Pub Date : 2018-07-15DOI: 10.20998/2078-774X.2018.11.12
A. Khalatov, N. Panchenko
{"title":"Influence of the Surface Rotation on the Efficiency of Film Cooling Behind the Trench Holes","authors":"A. Khalatov, N. Panchenko","doi":"10.20998/2078-774X.2018.11.12","DOIUrl":"https://doi.org/10.20998/2078-774X.2018.11.12","url":null,"abstract":"","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133007380","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 : 2018-07-15DOI: 10.20998/2078-774X.2018.12.09
O. Chernousenko, A. G. Nikulenkov, T. Nikulenkova, L. S. Butovsky, I. Bednarska
To extend the operation life of the turbine of nuclear power plant the range of work should be done to evaluate the technical state of turbine, in particular to detect and analyze the defects, carry out investigation into the causes of a failure and the mechanisms of their appearance and possible development. The residual life is also assessed and the recommendations on the control of ageing are given to provide reliable and safe turbine operation during the period exceeding the design service life. One of the methods of estimation of the residual life is the use of the software based on the finite-element method of the solution of differential equations with partial derivative and also integral equations. This scientific paper gives the computation data for boundary conditions obtained to define the heat state and estimate the operational life of high pressure rotor using the software based on finite-element method. The high-pressure rotor was conventionally split into specific sections for which the coefficients of heat transfer from the steam medium to the rotor body were defined depending on the standard schedule of the cold, warm and hot starts-up of the turbine.
{"title":"Calculating Boundary Conditions to Determine the Heat State of High Pressure Rotor of the Turbine NPP K-1000-60/3000","authors":"O. Chernousenko, A. G. Nikulenkov, T. Nikulenkova, L. S. Butovsky, I. Bednarska","doi":"10.20998/2078-774X.2018.12.09","DOIUrl":"https://doi.org/10.20998/2078-774X.2018.12.09","url":null,"abstract":"To extend the operation life of the turbine of nuclear power plant the range of work should be done to evaluate the technical state of turbine, in particular to detect and analyze the defects, carry out investigation into the causes of a failure and the mechanisms of their appearance and possible development. The residual life is also assessed and the recommendations on the control of ageing are given to provide reliable and safe turbine operation during the period exceeding the design service life. One of the methods of estimation of the residual life is the use of the software based on the finite-element method of the solution of differential equations with partial derivative and also integral equations. This scientific paper gives the computation data for boundary conditions obtained to define the heat state and estimate the operational life of high pressure rotor using the software based on finite-element method. The high-pressure rotor was conventionally split into specific sections for which the coefficients of heat transfer from the steam medium to the rotor body were defined depending on the standard schedule of the cold, warm and hot starts-up of the turbine.","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"391 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116225892","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 : 2018-07-15DOI: 10.20998/2078-774x.2018.12.07
O. Chernousenko, D. Rindyuk, V. Peshko
The power-generating units at the Kurakhovska Heat Power Plant of 200MW with steam turbines K-200-130 that reached their fleet life require today the decision taking on the possibility of their further operation. In this connection, the problems of taking into consideration the damages caused by the action of high local temperatures, the local temperature nonuniformity and a reliable estimation of the residual life of rotors is vital. Based on the developed methods of calculated estimate of the action of local nonuniformity of heat losses we computed the residual life of HP and AP rotors of the steam turbine K-200-130-3. The elastically deformed rotor state was calculated taking into account the joint action of the temperature gradient, centrifugal forces and steam-pressure in operation. A total level of damage of the metal of HPR and APR was defined based on the computations of the low-cycle fatigue and the static damageability. The recommendations were given on the opportunity for the refreshing extension of the service life of high pressure rotors and low pressure rotors of the steam turbine of 200 MW used for the power-generating units No 4 and No 5 at Kurakhovska heat power plant, exceeding their fleet life stated in current normative documents. High pressure rotors and low-pressure rotors of the power-generating unit No 4 at Kurakhovska heat power plant can operate for additional 45 thousand hours and the power-generating unit No 5 can additionally operate during 50 thousand hours. Key words: average pressure rotor, high pressure rotor, cold start-up, warm start-up, hot start-up, residual life, low-cycle fatigue and the long-term strength.
{"title":"Refreshing Extension of the Operation of High Pressure Rotors and Average Pressure Rotors of the Turbine K-200-130 at the Kurakhovska Heat Power Plant","authors":"O. Chernousenko, D. Rindyuk, V. Peshko","doi":"10.20998/2078-774x.2018.12.07","DOIUrl":"https://doi.org/10.20998/2078-774x.2018.12.07","url":null,"abstract":"The power-generating units at the Kurakhovska Heat Power Plant of 200MW with steam turbines K-200-130 that reached their fleet life require today the decision taking on the possibility of their further operation. In this connection, the problems of taking into consideration the damages caused by the action of high local temperatures, the local temperature nonuniformity and a reliable estimation of the residual life of rotors is vital. Based on the developed methods of calculated estimate of the action of local nonuniformity of heat losses we computed the residual life of HP and AP rotors of the steam turbine K-200-130-3. The elastically deformed rotor state was calculated taking into account the joint action of the temperature gradient, centrifugal forces and steam-pressure in operation. A total level of damage of the metal of HPR and APR was defined based on the computations of the low-cycle fatigue and the static damageability. The recommendations were given on the opportunity for the refreshing extension of the service life of high pressure rotors and low pressure rotors of the steam turbine of 200 MW used for the power-generating units No 4 and No 5 at Kurakhovska heat power plant, exceeding their fleet life stated in current normative documents. High pressure rotors and low-pressure rotors of the power-generating unit No 4 at Kurakhovska heat power plant can operate for additional 45 thousand hours and the power-generating unit No 5 can additionally operate during 50 thousand hours. Key words: average pressure rotor, high pressure rotor, cold start-up, warm start-up, hot start-up, residual life, low-cycle fatigue and the long-term strength.","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"167 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114304303","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 : 2018-07-15DOI: 10.20998/2078-774X.2018.12.04
A. Usaty, A. Pham
ABSTRACT As a result of conducting and processing the results of numerical studies, an analytical dependence was obtained to estimate the squares of the velocity coefficients of the nozzle arrays with Rotating diaphragms. The obtained dependence makes it possible to estimate the effect of the geometric and regime parameters of the gratings on their efficiency. To obtain such a dependence using the rich Rechtshafner plan and an additional plan that increases the accuracy and adequacy of the dependence, a computational experiment was planned. In accordance with the developed experiment plans, a number of nozzle arrays with different geometries and the relative displacement of their fixed and Rotating parts were designed and their calculated areas were constructed. With the help of complex CFD, the corresponding computational studies were carried out to evaluate the effect of geometric and regime parameters of nozzle arrays with Rotating diaphragms on their effectiveness. The squares of the velocity coefficients of the nozzle arrays with Rotating diaphragms obtained in the course of numerical studies were used in the process of appropriate processing and the creation of an analytic dependence to evaluate the effectiveness of such gratings. The results of numerical studies, the form of the analytical dependence and the graphs of the influence of geometric and regime parameters on the squares of the speed coefficients of the nozzle arrays with Rotating diaphragms are presented. The obtained dependence is intended for solving problems of synthesis and analysis of heating turbines with adjustable steam samplings.
{"title":"Evaluation of the Efficiency of the Socket Latches by Turn-Link Diaphragms Using the Cfd-Packet","authors":"A. Usaty, A. Pham","doi":"10.20998/2078-774X.2018.12.04","DOIUrl":"https://doi.org/10.20998/2078-774X.2018.12.04","url":null,"abstract":"ABSTRACT As a result of conducting and processing the results of numerical studies, an analytical dependence was obtained to estimate the squares of the velocity coefficients of the nozzle arrays with Rotating diaphragms. The obtained dependence makes it possible to estimate the effect of the geometric and regime parameters of the gratings on their efficiency. To obtain such a dependence using the rich Rechtshafner plan and an additional plan that increases the accuracy and adequacy of the dependence, a computational experiment was planned. In accordance with the developed experiment plans, a number of nozzle arrays with different geometries and the relative displacement of their fixed and Rotating parts were designed and their calculated areas were constructed. With the help of complex CFD, the corresponding computational studies were carried out to evaluate the effect of geometric and regime parameters of nozzle arrays with Rotating diaphragms on their effectiveness. The squares of the velocity coefficients of the nozzle arrays with Rotating diaphragms obtained in the course of numerical studies were used in the process of appropriate processing and the creation of an analytic dependence to evaluate the effectiveness of such gratings. The results of numerical studies, the form of the analytical dependence and the graphs of the influence of geometric and regime parameters on the squares of the speed coefficients of the nozzle arrays with Rotating diaphragms are presented. The obtained dependence is intended for solving problems of synthesis and analysis of heating turbines with adjustable steam samplings.","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114478734","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 : 2018-07-15DOI: 10.20998/2078-774x.2018.12.08
Y. A. Oleynik, A. Prasko, Elena Georgievna Osmanova, S. Naumenko
{"title":"Determining the Coefficient of Efficiency for the Drives of Centrifugal and Piston Compressors","authors":"Y. A. Oleynik, A. Prasko, Elena Georgievna Osmanova, S. Naumenko","doi":"10.20998/2078-774x.2018.12.08","DOIUrl":"https://doi.org/10.20998/2078-774x.2018.12.08","url":null,"abstract":"","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121595085","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 : 2018-07-15DOI: 10.20998/2078-774X.2018.12.03
T. V. Sheleshey
{"title":"Influence of a Change in the Thermal Loading on the Temperature of Exhaust Gases of the Boilers Used by Gas-&-Fuel Fired Heat and Power Plants","authors":"T. V. Sheleshey","doi":"10.20998/2078-774X.2018.12.03","DOIUrl":"https://doi.org/10.20998/2078-774X.2018.12.03","url":null,"abstract":"","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132865950","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 : 2018-07-15DOI: 10.20998/2078-774X.2018.12.06
A. Baranyuk, Valeriy Rogachоv, A. Rachynskyi
It is known that today the cooling system of efficient air compressors that allows us to cool both heated compressor parts and the produced compressed air releases the heat to the environment. This heat can be used for common good, for example for the domestic water heating. Available cooling systems can conventionally be divided into the two types, in particular the air cooling system and the water cooling system. In the case of water cooling system it is possible to use the plate-type heat exchanger. It is known that plate-type heat exchangers are very compact and have a low hydraulic resistance at simultaneously high heat-exchange intensity. Today, we have an ample amount of developed analytical methods used for the computation of heat exchange and hydrodynamics in the channels of plate-type heat exchangers and the thermal state of such heat exchangers; however we are lacking of the research done using the tools of CFD-simulation. The authors made an attempt to determine the heat load and the hydraulic resistance of the plate-type heat exchanger of a sectional type using the developed methods of CFD-simulation in the software environment of ANSYS-Fluent system. The simulation data were verified and compared with the computation data obtained using a known engineering technique used for the computation of the heat-hydraulic characteristics of plate-type heat exchangers. The research data can be used for the heat-exchange intensification assessment and for the analysis of the flow to improve the efficiency of the plate-type heat exchanger.
{"title":"Numerical Simulation of Heat Hydraulic Characteristics of the Plate-Type Heat-Exchanger","authors":"A. Baranyuk, Valeriy Rogachоv, A. Rachynskyi","doi":"10.20998/2078-774X.2018.12.06","DOIUrl":"https://doi.org/10.20998/2078-774X.2018.12.06","url":null,"abstract":"It is known that today the cooling system of efficient air compressors that allows us to cool both heated compressor parts and the produced compressed air releases the heat to the environment. This heat can be used for common good, for example for the domestic water heating. Available cooling systems can conventionally be divided into the two types, in particular the air cooling system and the water cooling system. In the case of water cooling system it is possible to use the plate-type heat exchanger. It is known that plate-type heat exchangers are very compact and have a low hydraulic resistance at simultaneously high heat-exchange intensity. Today, we have an ample amount of developed analytical methods used for the computation of heat exchange and hydrodynamics in the channels of plate-type heat exchangers and the thermal state of such heat exchangers; however we are lacking of the research done using the tools of CFD-simulation. The authors made an attempt to determine the heat load and the hydraulic resistance of the plate-type heat exchanger of a sectional type using the developed methods of CFD-simulation in the software environment of ANSYS-Fluent system. The simulation data were verified and compared with the computation data obtained using a known engineering technique used for the computation of the heat-hydraulic characteristics of plate-type heat exchangers. The research data can be used for the heat-exchange intensification assessment and for the analysis of the flow to improve the efficiency of the plate-type heat exchanger.","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117149264","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 : 2018-07-15DOI: 10.20998/2078-774x.2018.12.01
V. Solodov, V. Konev
{"title":"Formation of Prospective l.P.C. Exhaust Compartment With the 1650 mm Blade Length","authors":"V. Solodov, V. Konev","doi":"10.20998/2078-774x.2018.12.01","DOIUrl":"https://doi.org/10.20998/2078-774x.2018.12.01","url":null,"abstract":"","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121976414","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 : 2018-07-14DOI: 10.20998/2078-774X.2018.11.05
T. V. Sheleshey
{"title":"Interaction of the Temperature of Exhaust Gases and the Economic, Technical and Ecological Indices of Heat and Power Plants","authors":"T. V. Sheleshey","doi":"10.20998/2078-774X.2018.11.05","DOIUrl":"https://doi.org/10.20998/2078-774X.2018.11.05","url":null,"abstract":"","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117246163","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 : 2018-07-14DOI: 10.20998/2078-774X.2018.11.02
O. Chernousenko, D. Rindyuk, V. Peshko
{"title":"Refreshing Extension of the Service Life of Cast High Temperature Equipment for the Power-Generating Units at Kurakhovska Heat Power Plant","authors":"O. Chernousenko, D. Rindyuk, V. Peshko","doi":"10.20998/2078-774X.2018.11.02","DOIUrl":"https://doi.org/10.20998/2078-774X.2018.11.02","url":null,"abstract":"","PeriodicalId":416126,"journal":{"name":"NTU \"KhPI\" Bulletin: Power and heat engineering processes and equipment","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127986187","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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