The complex thermophysical property of temperature-sensitive paint (TSP) research is discussed. TSP is used for visualization of the surface temperature distribution in wind tunnel aerodynamic tests. The purpose of this research was to provide reliable, experimental, thermophysical data of the paint applied as a coating. As TSP is applied as thin surface layers, investigation of its final properties is challenging and demands the application of non-standard procedures. At present, most measurements were performed on composite specimens of TSP deposed onto a thin metallic film substrate or on TSP combined with a cellulose sheet support. The studies involved gravimetric„ thermogravimetric, and microcalorimetric analyses, transversal thermal diffusivity estimation from laser flash data and in-plane effective thermal diffusivity measurements done by the temperature oscillation technique. These results were complemented with scanning electron microcopy analysis, surface characterization and the results of dilatometric measurements performed on the TSP bulk specimens obtained from liquid substrate by casting. Complex analysis of the obtained results indicated an isotropic characteristic of the thermal diffusivity of the TSP layer and provided reliable data on all measured thermophysical parameters—they were revealed to be typical for insulators. Further to presenting these data, the paper, in brief, presents the applied investigation procedures.
{"title":"Thermophysical Properties of Temperature Sensitive Paint","authors":"W. Stryczniewicz, A. Panas, R. Szczepaniak","doi":"10.2514/6.2018-3268","DOIUrl":"https://doi.org/10.2514/6.2018-3268","url":null,"abstract":"The complex thermophysical property of temperature-sensitive paint (TSP) research is discussed. TSP is used for visualization of the surface temperature distribution in wind tunnel aerodynamic tests. The purpose of this research was to provide reliable, experimental, thermophysical data of the paint applied as a coating. As TSP is applied as thin surface layers, investigation of its final properties is challenging and demands the application of non-standard procedures. At present, most measurements were performed on composite specimens of TSP deposed onto a thin metallic film substrate or on TSP combined with a cellulose sheet support. The studies involved gravimetric„ thermogravimetric, and microcalorimetric analyses, transversal thermal diffusivity estimation from laser flash data and in-plane effective thermal diffusivity measurements done by the temperature oscillation technique. These results were complemented with scanning electron microcopy analysis, surface characterization and the results of dilatometric measurements performed on the TSP bulk specimens obtained from liquid substrate by casting. Complex analysis of the obtained results indicated an isotropic characteristic of the thermal diffusivity of the TSP layer and provided reliable data on all measured thermophysical parameters—they were revealed to be typical for insulators. Further to presenting these data, the paper, in brief, presents the applied investigation procedures.","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124359801","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}
E. Khalil, A. Adel, Gamal a. ElHarriri, W. Abdelmaksoud, E. Saad
{"title":"On the Modelling of Shell and Tube Heat Exchanger Characteristics","authors":"E. Khalil, A. Adel, Gamal a. ElHarriri, W. Abdelmaksoud, E. Saad","doi":"10.2514/6.2018-3906","DOIUrl":"https://doi.org/10.2514/6.2018-3906","url":null,"abstract":"","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124805244","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}
{"title":"Extension of Kestrel to General Thermochemical Models, Part II","authors":"R. B. Bond, D. Stefanski","doi":"10.2514/6.2018-3267","DOIUrl":"https://doi.org/10.2514/6.2018-3267","url":null,"abstract":"","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126648473","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}
{"title":"Helical Droplet Heat Exchanger: A Novel Thermal Management Device","authors":"W. Flaherty, R. Fontaine","doi":"10.2514/6.2018-4183","DOIUrl":"https://doi.org/10.2514/6.2018-4183","url":null,"abstract":"","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115219654","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}
Lucas Prado Mattos, M. E. Cruz, J. Bravo-Castillero
{"title":"Numerical Calculation of the Effective Thermal Conductivity of Three-Dimensional Three-Scale Microstructures","authors":"Lucas Prado Mattos, M. E. Cruz, J. Bravo-Castillero","doi":"10.2514/6.2018-3587","DOIUrl":"https://doi.org/10.2514/6.2018-3587","url":null,"abstract":"","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116200330","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 aerodynamics of entry into gas giants are dominated by thermochemical processes occurring in the shock layers. These processes are specific to the gas giants, with their unique atmospheric composition of hydrogen and helium, and are not well understood. This paper used the condition with the maximum enthalpy which can be achieved in the expansion tube, X2, as well as increased helium content in the test gas, to generate a radiation field representative of blunt body Saturn entry. These are the first spectrally resolved radiation measurement ever performed in an impulse facility to study simulated Saturn entry. Both high speed imaging and spectrometry were employed to measure the atomic hydrogen radiation emitted from Balmer series of hydrogen atoms. The bright region in the radiation field merely exists near the model surface, indicative of the slow ionization process,which causes the electron number densities to build up only near the surface. From the central streamline spectral data, H-α was the strongest transition, while other transitions (n < 3) were negligible after the shock, and became brighter near the body. Both the horizontal radiance profile and high speed image were employed to locate the focused slices in vertical shots. It was also found by the Specair calculation that self-absorption is more likely to occur in H-α radiance than in H-β radiance with the line of sight in this study.
{"title":"Experimental study of Saturn entry radiation with higher amount of diluent in an expansion tube","authors":"Yu Liu, C. James, R. Morgan, T. Mcintyre","doi":"10.2514/6.2018-4070","DOIUrl":"https://doi.org/10.2514/6.2018-4070","url":null,"abstract":"The aerodynamics of entry into gas giants are dominated by thermochemical processes occurring in the shock layers. These processes are specific to the gas giants, with their unique atmospheric composition of hydrogen and helium, and are not well understood. This paper used the condition with the maximum enthalpy which can be achieved in the expansion tube, X2, as well as increased helium content in the test gas, to generate a radiation field representative of blunt body Saturn entry. These are the first spectrally resolved radiation measurement ever performed in an impulse facility to study simulated Saturn entry. Both high speed imaging and spectrometry were employed to measure the atomic hydrogen radiation emitted from Balmer series of hydrogen atoms. The bright region in the radiation field merely exists near the model surface, indicative of the slow ionization process,which causes the electron number densities to build up only near the surface. From the central streamline spectral data, H-α was the strongest transition, while other transitions (n < 3) were negligible after the shock, and became brighter near the body. Both the horizontal radiance profile and high speed image were employed to locate the focused slices in vertical shots. It was also found by the Specair calculation that self-absorption is more likely to occur in H-α radiance than in H-β radiance with the line of sight in this study.","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"7 19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122894633","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}
{"title":"Spatially Resolved Analysis of Material Response to Destructive Environments Utilizing Three-Dimensional Scans","authors":"J. Engerer, Alexander L. Brown","doi":"10.2514/6.2018-3761","DOIUrl":"https://doi.org/10.2514/6.2018-3761","url":null,"abstract":"","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128341474","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}
{"title":"Simulation of Radiative Heat Transfer in a Particle Laden Flow","authors":"K. Hansson, I. Boyd","doi":"10.2514/6.2018-4288","DOIUrl":"https://doi.org/10.2514/6.2018-4288","url":null,"abstract":"","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128913928","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}
{"title":"Molecular and Continuum Simulations of Binary Gas Mixture Flow Through Curved Micronozzles","authors":"M. Darbandi, Moslem Sabouri, G. Schneider","doi":"10.2514/6.2018-4184","DOIUrl":"https://doi.org/10.2514/6.2018-4184","url":null,"abstract":"","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114720044","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}
A. Wise, D. Prabhu, C. Johnston, David Saunders, K. Edquist
The simulation tools and processes used to generate aerothermodynamic environment definitions for the Mars 2020 entry capsule are presented. The Mars 2020 capsule leverages the heritage Mars Science Laboratory design, but the entry will follow a different trajectory, landing at a different location and altitude onMars. The general strategy for creating theMars 2020mission-specific environments follows from theMars Science Laboratory experience. The primary difference is that now the effects of shock-layer radiation are modeled, with particular concern for the backshell.
{"title":"Computational Aerothermodynamic Environments for the Mars 2020 Entry Capsule","authors":"A. Wise, D. Prabhu, C. Johnston, David Saunders, K. Edquist","doi":"10.2514/6.2018-3116","DOIUrl":"https://doi.org/10.2514/6.2018-3116","url":null,"abstract":"The simulation tools and processes used to generate aerothermodynamic environment definitions for the Mars 2020 entry capsule are presented. The Mars 2020 capsule leverages the heritage Mars Science Laboratory design, but the entry will follow a different trajectory, landing at a different location and altitude onMars. The general strategy for creating theMars 2020mission-specific environments follows from theMars Science Laboratory experience. The primary difference is that now the effects of shock-layer radiation are modeled, with particular concern for the backshell.","PeriodicalId":423948,"journal":{"name":"2018 Joint Thermophysics and Heat Transfer Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128063198","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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