Pub Date : 2003-03-01DOI: 10.3154/JVS.22.1SUPPLEMENT_329
Yoshiaki Nakamura, M. Kurita
{"title":"Pressure- and Temperature-Sensitive Paint Measurements in Shock Tunnel","authors":"Yoshiaki Nakamura, M. Kurita","doi":"10.3154/JVS.22.1SUPPLEMENT_329","DOIUrl":"https://doi.org/10.3154/JVS.22.1SUPPLEMENT_329","url":null,"abstract":"","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132674649","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}
安部 隆士, 松田 淳, 藤田 和央, 佐藤 俊逸, T. Abe, A. Matsuda, K. Fujita, S. Sato
The nonequilibrium behavior behind the shock wave in a thin air was investigated experimentally. For the experiment, a free-piston-driven shock tube was used and a radiation from behind the shock front was investigated spectroscopically. Being based on the radiation spectrum emitted from the region behind the shock wave, the distributions for rotational and vibrational temperatures of N2 and N + 2 , and electron density were determined. These results were compared with those for a pure nitrogen gas which was investigated previously. It was found that there is remarkable resemblance between the distributions in an air and in a pure nitrogen gas. This suggests that the existence of molecular oxygen in an air has only a little in°uence on the behavior of temperatures of N2 or N + 2 , and the behavior of electron density behind the shock wave, compared with those observed in a pure nitrogen gas.
{"title":"Experimental Study of Nonequilibrium Phenomena behind Strong Shock Waves Generated in Super-orbital Reentry Flight","authors":"安部 隆士, 松田 淳, 藤田 和央, 佐藤 俊逸, T. Abe, A. Matsuda, K. Fujita, S. Sato","doi":"10.2514/6.2002-3101","DOIUrl":"https://doi.org/10.2514/6.2002-3101","url":null,"abstract":"The nonequilibrium behavior behind the shock wave in a thin air was investigated experimentally. For the experiment, a free-piston-driven shock tube was used and a radiation from behind the shock front was investigated spectroscopically. Being based on the radiation spectrum emitted from the region behind the shock wave, the distributions for rotational and vibrational temperatures of N2 and N + 2 , and electron density were determined. These results were compared with those for a pure nitrogen gas which was investigated previously. It was found that there is remarkable resemblance between the distributions in an air and in a pure nitrogen gas. This suggests that the existence of molecular oxygen in an air has only a little in°uence on the behavior of temperatures of N2 or N + 2 , and the behavior of electron density behind the shock wave, compared with those observed in a pure nitrogen gas.","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116014246","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 aerodynamic heating to the super orbital reentry capsule of MUSES-C is numerically studied by using thermochemical nonequilibrium full Viscous-Shock-Layer (VSL) equations. An 11 airspecies model is used for non-ablating boundary conditions. Six carbonous species are added for ablating boundary conditions. With a three-temperature model, thermal nonequilibrium effect is taken into account. The convective and radiative heat fluxes to the wall are examined for both fully catalytic wall (FCW) condition and non-catalytic wall (NCW) condition at various altitudes for the capsule reentry trajectory path. The maximum heat fluxes estimated for FCW and NCW are 8.7 MW/m2 at the altitude of 56 km and 6.1 MW/m2 at the altitude of 56 km, respectively. The radiative heat flux at the stagnation point of the capsule has also been calculated and the maximum radiative heat flux of 0.9 MW/m2 has been found at the altitude of 62 km. The intensity of UV and VUV spectra are extremely intense, so that such UV and VUV spectra mainly contribute to the radiative heat flux.
{"title":"A Thermochemical Nonequilibrium Flow around a Super Orbital Reentry Capsule with Ablation","authors":"Ryoji Doihara, M. Nishida, 良次 土井原, 迪雄 西田","doi":"10.1063/1.1407630","DOIUrl":"https://doi.org/10.1063/1.1407630","url":null,"abstract":"The aerodynamic heating to the super orbital reentry capsule of MUSES-C is numerically studied by using thermochemical nonequilibrium full Viscous-Shock-Layer (VSL) equations. An 11 airspecies model is used for non-ablating boundary conditions. Six carbonous species are added for ablating boundary conditions. With a three-temperature model, thermal nonequilibrium effect is taken into account. The convective and radiative heat fluxes to the wall are examined for both fully catalytic wall (FCW) condition and non-catalytic wall (NCW) condition at various altitudes for the capsule reentry trajectory path. The maximum heat fluxes estimated for FCW and NCW are 8.7 MW/m2 at the altitude of 56 km and 6.1 MW/m2 at the altitude of 56 km, respectively. The radiative heat flux at the stagnation point of the capsule has also been calculated and the maximum radiative heat flux of 0.9 MW/m2 has been found at the altitude of 62 km. The intensity of UV and VUV spectra are extremely intense, so that such UV and VUV spectra mainly contribute to the radiative heat flux.","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130786945","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 : 2000-12-01DOI: 10.1017/s0074180900226429
J. Mather, H. Stockman
The Next Generation Space Telescope NGST is an 6-7 m class radiatively cooled telescope, planned for launch to the Lagrange point L2 in 2009, to be built by a partnership of NASA, ESA, and CSA. The NGST science program calls for three core instruments: 1) Near IR camera, 0.6 - 5 micrometer; 2) Near IR multiobject spectrometer, 1 - 5 micrometer, and 3) Mid IR camera and spectrometer, 5 - 28 micrometers. I will report on the scientific goals, project status, and the recent reduction in aperture from the target of 8 m.
{"title":"The Next Generation Space Telescope","authors":"J. Mather, H. Stockman","doi":"10.1017/s0074180900226429","DOIUrl":"https://doi.org/10.1017/s0074180900226429","url":null,"abstract":"The Next Generation Space Telescope NGST is an 6-7 m class radiatively cooled telescope, planned for launch to the Lagrange point L2 in 2009, to be built by a partnership of NASA, ESA, and CSA. The NGST science program calls for three core instruments: 1) Near IR camera, 0.6 - 5 micrometer; 2) Near IR multiobject spectrometer, 1 - 5 micrometer, and 3) Mid IR camera and spectrometer, 5 - 28 micrometers. I will report on the scientific goals, project status, and the recent reduction in aperture from the target of 8 m.","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121949930","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}
T. Abe, Syunichi Sato, Yutaka Matsukawa, Kazuyuki Yamamoto, K. Hiraoka
{"title":"Study for Dynamically Unstable Motion of Reentry Capsule","authors":"T. Abe, Syunichi Sato, Yutaka Matsukawa, Kazuyuki Yamamoto, K. Hiraoka","doi":"10.2514/6.2000-2589","DOIUrl":"https://doi.org/10.2514/6.2000-2589","url":null,"abstract":"","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122946988","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":"A Self-consistent Tension Shell Structure for Application to Aerobraking Vehicle and its Aerodynamic Characteristics","authors":"T. Abe","doi":"10.2514/6.1988-3405","DOIUrl":"https://doi.org/10.2514/6.1988-3405","url":null,"abstract":"","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121419599","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":"Computation of Three-Dimensional Chemically Reacting Viscous Flow around Rocket Body","authors":"K. Reddy, T. Fujiwara, T. Ogawa, K. Arashi","doi":"10.2514/6.1988-2616","DOIUrl":"https://doi.org/10.2514/6.1988-2616","url":null,"abstract":"","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122318956","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 : 1986-03-01DOI: 10.1007/978-3-642-82758-7_3
T. Kambe, T. Minota, Y. Ikushima
{"title":"Acoustic Waves Emitted by Vortex-Body Interaction","authors":"T. Kambe, T. Minota, Y. Ikushima","doi":"10.1007/978-3-642-82758-7_3","DOIUrl":"https://doi.org/10.1007/978-3-642-82758-7_3","url":null,"abstract":"","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"205 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123380074","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 permeability of a screen wick is a significant factor that governs the performance of heat pipe. The modified Blake-Kozeney equation indicates that the permeability of the screen wick is subject to the porosity of the screen wick. However, the porosity of the screen wick is usually unknown because of the structural complexity of the screen wick especially in the operating condition. Several conceivable parameters such as inter-wire clearance, inter-layer clearance, number of layers, etc. affect the porosity of the screen wick. Nevertheless, Marcus equation does not include these parameters. To include these significant perameters, the present study employs a geometric model in which the shape of the woven structure of the screen wick is represented by piecewise arcs and clearance exists between layers. Based on this model the equation for the permeability of the screen wick is derived. Numerical calculations are performed and experimental measurements are conducted for validation.
{"title":"Permeability of a Screen Wick","authors":"Y. Ikeda","doi":"10.1299/KIKAIB.52.2612","DOIUrl":"https://doi.org/10.1299/KIKAIB.52.2612","url":null,"abstract":"The permeability of a screen wick is a significant factor that governs the performance of heat pipe. The modified Blake-Kozeney equation indicates that the permeability of the screen wick is subject to the porosity of the screen wick. However, the porosity of the screen wick is usually unknown because of the structural complexity of the screen wick especially in the operating condition. Several conceivable parameters such as inter-wire clearance, inter-layer clearance, number of layers, etc. affect the porosity of the screen wick. Nevertheless, Marcus equation does not include these parameters. To include these significant perameters, the present study employs a geometric model in which the shape of the woven structure of the screen wick is represented by piecewise arcs and clearance exists between layers. Based on this model the equation for the permeability of the screen wick is derived. Numerical calculations are performed and experimental measurements are conducted for validation.","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129124713","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 : 1983-03-01DOI: 10.1017/S0263034600000306
S. Kawata, K. Niu
{"title":"Numerical Simulations for Intense Light-Ion Beam Propagation in Channel under Influence of Plasma Inertia","authors":"S. Kawata, K. Niu","doi":"10.1017/S0263034600000306","DOIUrl":"https://doi.org/10.1017/S0263034600000306","url":null,"abstract":"","PeriodicalId":205164,"journal":{"name":"The Institute of Space and Astronautical Science report. S.P","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116303224","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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