Gold nanowires with polyelectrolytes adsorbed on their surface are widely used in various biomedical research. In this work, for the first time, conformationalchanges in polyelectrolytes on the surface of a gold nanowire transversely polarized in an external electric field were considered. The properties of a specially created analytical model of conformational rearrangements of a Gaussian macromolecular chain adsorbed on the surface of a cylindrical metal nanowire in an external electric field transverse to the axis of the nanowire were investigated. Conformational changes of uniformly charged polypeptides on the surface of a transversely polarized gold nanowire have been studied using molecular dynamics simulation. On the basis of the analytical model and the results of molecular dynamics simulation, the spatial distributions of the density of polyelectrolyte units on the surface of the nanowire were constructed. With an increase in the strength of the external electric field, an asymmetric stretching of the polyelectrolyte fringe in the direction of the dipole moment of the transversely polarized nanowire was observed.
{"title":"MODELING OF CONFORMATIONAL CHANGES OF POLYELECTROLYTES ON THE SURFACE OF A TRANSVERSELY POLARIZED METAL NANOWIRE IN AN EXTERNAL ELECTRIC FIELD","authors":"M. Kucherenko","doi":"10.31489/2022no2/19-29","DOIUrl":"https://doi.org/10.31489/2022no2/19-29","url":null,"abstract":"Gold nanowires with polyelectrolytes adsorbed on their surface are widely used in various biomedical research. In this work, for the first time, conformationalchanges in polyelectrolytes on the surface of a gold nanowire transversely polarized in an external electric field were considered. The properties of a specially created analytical model of conformational rearrangements of a Gaussian macromolecular chain adsorbed on the surface of a cylindrical metal nanowire in an external electric field transverse to the axis of the nanowire were investigated. Conformational changes of uniformly charged polypeptides on the surface of a transversely polarized gold nanowire have been studied using molecular dynamics simulation. On the basis of the analytical model and the results of molecular dynamics simulation, the spatial distributions of the density of polyelectrolyte units on the surface of the nanowire were constructed. With an increase in the strength of the external electric field, an asymmetric stretching of the polyelectrolyte fringe in the direction of the dipole moment of the transversely polarized nanowire was observed.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46757752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-15DOI: 10.31489/2022no2/101-106
Saulebekov A.O, Kambarova Zh.T
The approach for the modeling of corpuscular-optical systems for the analysis of charged particle flows is considered. For all the methods considered and used earlier, the condition of spatial focusing of the particle beam was required. However, this strict condition is not always feasible in combination with other requirements. When a cylindrical electrostatic mirror analyzer is used as the main element, spatial focusing ofthe beam is incompatible with focusing in time of flight in terms of energy. In the paper the possibility of using the collimation regime of charged particle beam is considered, thereby eliminating the need to fulfill the focusing condition.
{"title":"SE OF COLLIMATION REGIME OF CHARGED PARTICLE BEAM FOR EXPAND THE FUNCTIONAL CAPABILITIES OF CORPUSCULAR OPTICAL SYSTEMS","authors":"Saulebekov A.O, Kambarova Zh.T","doi":"10.31489/2022no2/101-106","DOIUrl":"https://doi.org/10.31489/2022no2/101-106","url":null,"abstract":"The approach for the modeling of corpuscular-optical systems for the analysis of charged particle flows is considered. For all the methods considered and used earlier, the condition of spatial focusing of the particle beam was required. However, this strict condition is not always feasible in combination with other requirements. When a cylindrical electrostatic mirror analyzer is used as the main element, spatial focusing ofthe beam is incompatible with focusing in time of flight in terms of energy. In the paper the possibility of using the collimation regime of charged particle beam is considered, thereby eliminating the need to fulfill the focusing condition.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44293028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The ability to use the algorithm synthetic inertia (SI) is one of the most important properties of renewable energy sources (RES) generating units connected to the network via a power converter (GUPC). Through the useof SI algorithm there is an opportunity to increase the inertia and damping properties of such plants. The effectiveness of the SI algorithm depends on the mains frequency input value, which is formed by the phase locked loop (PLL), which is an integral part of the power converter control system. However, the operation of the PLL can lead to oscillations with different frequencies when the GUPC is installed in weak electrical networks and, accordingly, adversely affect the performance of the SI algorithm. The studies have shown that the PLL in the photovoltaic plant (PV) control system allows to influence the performance of the SI algorithm, but the nature of this influence depends on the electric network density and can be positive or negative. The influence obtained on the test EPS is also confirmed for the power system of large-scale.
{"title":"STUDY OF ALGORITHM SYNTHETIC INERTIA FUNCTIONING IN ELECTRIC NETWORKS OFDIFFERENT DENSITY","authors":"V. Rudnik","doi":"10.31489/2022no2/75-85","DOIUrl":"https://doi.org/10.31489/2022no2/75-85","url":null,"abstract":"The ability to use the algorithm synthetic inertia (SI) is one of the most important properties of renewable energy sources (RES) generating units connected to the network via a power converter (GUPC). Through the useof SI algorithm there is an opportunity to increase the inertia and damping properties of such plants. The effectiveness of the SI algorithm depends on the mains frequency input value, which is formed by the phase locked loop (PLL), which is an integral part of the power converter control system. However, the operation of the PLL can lead to oscillations with different frequencies when the GUPC is installed in weak electrical networks and, accordingly, adversely affect the performance of the SI algorithm. The studies have shown that the PLL in the photovoltaic plant (PV) control system allows to influence the performance of the SI algorithm, but the nature of this influence depends on the electric network density and can be positive or negative. The influence obtained on the test EPS is also confirmed for the power system of large-scale.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46972281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Large-scale deployment of the perovskite photovoltaic technology using such high-performance materials as СH3NH3PbI3may face serious environmental issuesin the future. Implementation of perovskite solar cellbased on Sncouldbe an alternative solution for commercialisation. This paperpresents the results of a theoretical study of a lead-free, environmentally-friendlyphotovoltaic cellusing СH3NH3SnI3as a light-absorbing layer. The characteristics of a photovoltaic cell based on perovskite were modelled using the SCAPS-1D program. Various thicknesses of the absorbing layer were analysed,and an optimised device structure is proposed,demonstratinga high power conversionefficiencyof up to 28% at ambient temperature. The analysis of the thicknesses of the СH3NH3SnI3absorbing layer revealedthat at a thickness of 500 nm, performance is demonstrated with an efficiencyof 27.41 %, a fill factor of 85.92 %, a short circuit current density of 32.60 mA/cm2and an open-circuit voltage of 0.98 V. The obtained numerical results indicate that the СH3NH3SnI3absorbing layer may be a viable replacement forthe standard materials and may form the basis of a highly efficient technology of the environmentally-friendlyperovskite solar cells.
{"title":"PERFORMANCE SIMULATION OF ECO-FRIENDLY SOLAR CELLS BASED ONCH3NH3SnI3","authors":"Z. Omarova","doi":"10.31489/2022no2/58-64","DOIUrl":"https://doi.org/10.31489/2022no2/58-64","url":null,"abstract":"Large-scale deployment of the perovskite photovoltaic technology using such high-performance materials as СH3NH3PbI3may face serious environmental issuesin the future. Implementation of perovskite solar cellbased on Sncouldbe an alternative solution for commercialisation. This paperpresents the results of a theoretical study of a lead-free, environmentally-friendlyphotovoltaic cellusing СH3NH3SnI3as a light-absorbing layer. The characteristics of a photovoltaic cell based on perovskite were modelled using the SCAPS-1D program. Various thicknesses of the absorbing layer were analysed,and an optimised device structure is proposed,demonstratinga high power conversionefficiencyof up to 28% at ambient temperature. The analysis of the thicknesses of the СH3NH3SnI3absorbing layer revealedthat at a thickness of 500 nm, performance is demonstrated with an efficiencyof 27.41 %, a fill factor of 85.92 %, a short circuit current density of 32.60 mA/cm2and an open-circuit voltage of 0.98 V. The obtained numerical results indicate that the СH3NH3SnI3absorbing layer may be a viable replacement forthe standard materials and may form the basis of a highly efficient technology of the environmentally-friendlyperovskite solar cells.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43599679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The polycrystalline copper-zinc manganite was synthesized by the solid-phase interaction in the range of 800-1200 °C of oxides of lanthanum (III), copper (II), zinc (II), manganese (III) and magnesium carbonate, thus its nanostructured particles were first obtained by grinding on the vibrating mill “Retsch” (Germany). The X-ray investigations determined that the nanostructured manganite is crystallized in the cubic syngony. On the LCR-7817/827 device(Company «Good Will Instrument Co., Ltd., Taiwan») in the range of 293-483 K at frequencies equal to 1.5 and 10 kHz, the dielectric constantand electrical resistance were investigated and it was found that this compound at 293-353 K has the semiconductorconductivity, at 353-373 K -metal and at 373-483 K -semiconductor conductivity again. The band gap widths were calculated. The permittivity at 483 K reaches gigantic values at all frequencies.Referring to the above, the objective of this paper is to study the temperature dependence of the dielectric constantand the electrical resistance of a new nanostructured copper-zinc manganite of lanthanum and magnesium.
通过镧（III）、铜（II）、锌（II）和锰（III）以及碳酸镁的氧化物在800-1200°C范围内的固相相互作用合成了多晶铜锌锰酸盐，从而首次在振动磨机“Retsch”（德国）上研磨获得了其纳米结构颗粒。X射线研究确定纳米结构的锰酸盐在立方合成气中结晶。在LCR-7817/827器件（公司«Good Will Instrument Co.，有限公司，台湾»）上，在293-483K范围内，在等于1.5和10kHz的频率下，研究了介电常数和电阻，发现该化合物在293-353K下具有半导电性，在353-373K下为金属，在373-483K下再次具有半导体导电性。计算了带隙宽度。483K的介电常数在所有频率下都达到了巨大的值。参考以上内容，本文的目的是研究一种新的镧和镁纳米结构铜锌锰酸盐的介电常数和电阻的温度依赖性。
{"title":"ELECTROPHYSICAL PROPERTIES OF NEW NANOSTRUCTURED COPPER-ZINC MANGANITE OF LANTHANUM AND MAGNESIUM","authors":"B. K. Kasenov","doi":"10.31489/2022no2/42-47","DOIUrl":"https://doi.org/10.31489/2022no2/42-47","url":null,"abstract":"The polycrystalline copper-zinc manganite was synthesized by the solid-phase interaction in the range of 800-1200 °C of oxides of lanthanum (III), copper (II), zinc (II), manganese (III) and magnesium carbonate, thus its nanostructured particles were first obtained by grinding on the vibrating mill “Retsch” (Germany). The X-ray investigations determined that the nanostructured manganite is crystallized in the cubic syngony. On the LCR-7817/827 device(Company «Good Will Instrument Co., Ltd., Taiwan») in the range of 293-483 K at frequencies equal to 1.5 and 10 kHz, the dielectric constantand electrical resistance were investigated and it was found that this compound at 293-353 K has the semiconductorconductivity, at 353-373 K -metal and at 373-483 K -semiconductor conductivity again. The band gap widths were calculated. The permittivity at 483 K reaches gigantic values at all frequencies.Referring to the above, the objective of this paper is to study the temperature dependence of the dielectric constantand the electrical resistance of a new nanostructured copper-zinc manganite of lanthanum and magnesium.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44653970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper describes the results of studies of hardening boride coatings obtained during the implementation of the process of self-propagating high-temperature synthesis. These coatings were composite materials based on aluminum oxide and boron. The obtained coatings were subjected to X-ray phase and microstructural analysis, which showed the maincomponents of the resulting compositions and made it possible to assess the thickness and structure of the coating-base metal transition area. The different content of silicon and iron makes it possible to assess the occurrence of surface chemical and metallurgical processes during self-propagating high-temperature synthesis when heating of the base mixture samples on high-frequency current treatment. The expediency of using high-frequency current treatment in combination with the process of self-propagating high-temperature synthesis for better-quality spattering of the hardening coating is shown. The appearance of two areas in the coating with different thickness and structure of the coating is established.
{"title":"RAY PHASE AND MICROSTRUCTURAL ANALYSIS OFHARDENING COATINGS OBTAINED BYSELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS IN COMBINATION WITH HEATING OFA MIXTURE OF 𝑨𝒍+𝑩𝟐𝑶𝟑BASED ON HIGH-FREQUENCY CURRENT TREATMENT","authors":"A. Ishkov","doi":"10.31489/2022no2/6-12","DOIUrl":"https://doi.org/10.31489/2022no2/6-12","url":null,"abstract":"The paper describes the results of studies of hardening boride coatings obtained during the implementation of the process of self-propagating high-temperature synthesis. These coatings were composite materials based on aluminum oxide and boron. The obtained coatings were subjected to X-ray phase and microstructural analysis, which showed the maincomponents of the resulting compositions and made it possible to assess the thickness and structure of the coating-base metal transition area. The different content of silicon and iron makes it possible to assess the occurrence of surface chemical and metallurgical processes during self-propagating high-temperature synthesis when heating of the base mixture samples on high-frequency current treatment. The expediency of using high-frequency current treatment in combination with the process of self-propagating high-temperature synthesis for better-quality spattering of the hardening coating is shown. The appearance of two areas in the coating with different thickness and structure of the coating is established.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49053306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
One of the main tasks of the situational awareness system in near-Earth space is to determine the type and class of observed objects by analyzing its reflection spectra. This paper proposes a methodology and interpretation of the spectral observational data of geostationary orbit satellites obtained at the Tian Shan Astronomical Observatory (Kazakhstan) from June-December 2021. 8 geostationary objects, the type and design features of which are known were selected as observation targets. The selected satellites are stable (no fast rotation of these objects was detected) and have large reflecting surface areas. An analysis of the obtained reflection spectra shows the dependence on the phase angle of the object. The studies carried out are especially relevant for objects in high orbits, where the only currently available methods of detection and study are ground-based optical photometry and spectroscopy using meter-class telescopes.
{"title":"SPECTRAL OBSERVATIONS OF GEOSTATIONARY SATELLITES","authors":"A. Serebryanskiy","doi":"10.31489/2022no2/93-100","DOIUrl":"https://doi.org/10.31489/2022no2/93-100","url":null,"abstract":"One of the main tasks of the situational awareness system in near-Earth space is to determine the type and class of observed objects by analyzing its reflection spectra. This paper proposes a methodology and interpretation of the spectral observational data of geostationary orbit satellites obtained at the Tian Shan Astronomical Observatory (Kazakhstan) from June-December 2021. 8 geostationary objects, the type and design features of which are known were selected as observation targets. The selected satellites are stable (no fast rotation of these objects was detected) and have large reflecting surface areas. An analysis of the obtained reflection spectra shows the dependence on the phase angle of the object. The studies carried out are especially relevant for objects in high orbits, where the only currently available methods of detection and study are ground-based optical photometry and spectroscopy using meter-class telescopes.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43309951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The spectral dependences of the transmittance and optical anisotropy effects in magnetic fluid have been investigated. It is shown that the refractive index spectra of bulk magnetite known are of little use for the quantitativeand qualitative interpretation of optical effects in magnetic fluids. The transmission, birefringence, and dichroism spectra are calculated using the known refractive index spectra of magnetite. The best agreement with the experiment was obtained using the experimental spectra of the complex refractive index of the powder of magnetite nanoparticles. It is concluded that there is a significant difference in the spectra of the complex refractive index for bulk and nanosized magnetite.
{"title":"SPECTRAL DEPENDENCIES OF MAGNETOOPTICAL EFFECTS IN MAGNETIC FLUIDS","authors":"C. Yerin","doi":"10.31489/2022no2/86-92","DOIUrl":"https://doi.org/10.31489/2022no2/86-92","url":null,"abstract":"The spectral dependences of the transmittance and optical anisotropy effects in magnetic fluid have been investigated. It is shown that the refractive index spectra of bulk magnetite known are of little use for the quantitativeand qualitative interpretation of optical effects in magnetic fluids. The transmission, birefringence, and dichroism spectra are calculated using the known refractive index spectra of magnetite. The best agreement with the experiment was obtained using the experimental spectra of the complex refractive index of the powder of magnetite nanoparticles. It is concluded that there is a significant difference in the spectra of the complex refractive index for bulk and nanosized magnetite.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41969371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Currently, there is an increase in average annual temperature and climate change across the various continents. Carbon dioxide emissions from energy facilities contributed to this condition. Implementation of oxy-fuel cycles is a promising solution for reducing carbon dioxide emissions from the energy sector. To date, the most efficient oxy-fuel cycle is the Allam cycle. In this cycle supercritical carbon dioxide acts as a working fluid of the cycle, wherein СО2’s temperature upstream of the turbine is 1,150 °С and the pressure is 30 MPa. Due to the high temperature of the working fluid, it is necessary to cool first stages of the carbon dioxide turbine. The feature of considered cooling system in this turbine is that carbon dioxide being used as a refrigerant too. This paper investigated two topologies of convective cooling systems in the carbon dioxide turbine’s nozzle blade as well as considers an option for increasing the intensity of heatexchange through the use of helical ribbing in the cylindrical cooling baffle. Numerical simulation involving the ANSYS software package was performed for two topologies of the cooling baffles arrangement in the nozzle blade body: configuration 1 -with 17 baffles of 1 mm diameter, configuration 2 -with three baffles of the blade profile shape. Configuration 1 proved to be more efficient: the Nusselt number has a value of 117, and average value of the heat transfer coefficient on the refrigerant side is 6,413 W/m2∙K. The effect of using helical ribbing in the cooling cylindrical baffle of the blade under study was investigated, which enabled to reduce the metal temperature by 54 °С on average and doubled the heat transfer coefficient.
{"title":"DEVELOPMENT AND RESEARCH OF THE TOPOLOGY OF COOLING BAFFLES FOR BLADES OF THE AXIAL CARBON DIOXIDE TURBINES","authors":"I. Komarov","doi":"10.31489/2022no2/48-57","DOIUrl":"https://doi.org/10.31489/2022no2/48-57","url":null,"abstract":"Currently, there is an increase in average annual temperature and climate change across the various continents. Carbon dioxide emissions from energy facilities contributed to this condition. Implementation of oxy-fuel cycles is a promising solution for reducing carbon dioxide emissions from the energy sector. To date, the most efficient oxy-fuel cycle is the Allam cycle. In this cycle supercritical carbon dioxide acts as a working fluid of the cycle, wherein СО2’s temperature upstream of the turbine is 1,150 °С and the pressure is 30 MPa. Due to the high temperature of the working fluid, it is necessary to cool first stages of the carbon dioxide turbine. The feature of considered cooling system in this turbine is that carbon dioxide being used as a refrigerant too. This paper investigated two topologies of convective cooling systems in the carbon dioxide turbine’s nozzle blade as well as considers an option for increasing the intensity of heatexchange through the use of helical ribbing in the cylindrical cooling baffle. Numerical simulation involving the ANSYS software package was performed for two topologies of the cooling baffles arrangement in the nozzle blade body: configuration 1 -with 17 baffles of 1 mm diameter, configuration 2 -with three baffles of the blade profile shape. Configuration 1 proved to be more efficient: the Nusselt number has a value of 117, and average value of the heat transfer coefficient on the refrigerant side is 6,413 W/m2∙K. The effect of using helical ribbing in the cooling cylindrical baffle of the blade under study was investigated, which enabled to reduce the metal temperature by 54 °С on average and doubled the heat transfer coefficient.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43325705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Energy-saving technologies are widely used in various technological processes, in particular for the final drying of plant waste. The purpose of the study is to ensure optimal flow distributions and making targeted changes in the design of the coolant supply system based on measurements of local velocities at characteristic points in space, using the methods of hot-wire anemometry.The measurements were carried out in stages and covered eight modifications of the installation. Based on the analysis of the data obtained, specific measures were developed to improve the design of the coolant supply system.
{"title":"OCAL APPROACH TO IMPROVE THE AERODYNAMIC CHARACTERISTICS OF THE FINAL DRYING PROCESS","authors":"T. Suprun","doi":"10.31489/2022no2/65-70","DOIUrl":"https://doi.org/10.31489/2022no2/65-70","url":null,"abstract":"Energy-saving technologies are widely used in various technological processes, in particular for the final drying of plant waste. The purpose of the study is to ensure optimal flow distributions and making targeted changes in the design of the coolant supply system based on measurements of local velocities at characteristic points in space, using the methods of hot-wire anemometry.The measurements were carried out in stages and covered eight modifications of the installation. Based on the analysis of the data obtained, specific measures were developed to improve the design of the coolant supply system.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43911251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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