| One—Dimensional Analysis of Thermal Choking in Case of Heat Addition in Ducts |
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| 引用本文： | YoshiakiMiyazato MasashiKashitani 等.One—Dimensional Analysis of Thermal Choking in Case of Heat Addition in Ducts[J].热科学学报(英文版),2000,9(3):224-229. |
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| 作者姓名： | YoshiakiMiyazato MasashiKashitani |
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| 作者单位： | Yoshiaki Miyazato; Mitsuharu Masuda; Kazuyasu Matsuo (Department of Energy and Environmental Engineering，Graduate School of Engineering Science，Kyushu University，6-1 Kasuga-Kouen，Kasuga，Fukuoka，816-8580，Japan |
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| 摘 要： | IntroductionThe s up ersonic- combus t ion ram j et (s cramj et ) engine is one of the most prollilsing air breathing prOPulsion systems for hypersonic transports. It is essentialto the design of scramjet engines that the fueLair miX-ture remains supersonic throughout the combustor.The subsonic combustion is better than the supersonic combustion from a standpoint of efficiency, bescause total pressure losses in heated supersonic flowsare higher than those in heated subsonic flows withsame st…
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| 关 键 词： | 燃烧室 边界层 热阻塞 热喷管 |
| 收稿时间： | 16 February 2009 |
One-dimensional analysis of thermal choking in case of heat addition in ducts |
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| Yoshiaki Miyazato,Mitsuharu Masuda,Kazuyasu Matsuo,Masashi Kashitani,Yutaka Yamaguchi.One-dimensional analysis of thermal choking in case of heat addition in ducts[J].Journal of Thermal Science,2000,9(3):224-229. |
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| Authors: | Yoshiaki Miyazato Mitsuharu Masuda Kazuyasu Matsuo Masashi Kashitani Yutaka Yamaguchi |
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| Affiliation: | (1) Department of Energy and Environmental Engineering, Graduate School of Engineering Science, Kyushu University, 6-1 Kasuga-Kouen, Kasuga, 816-8580 Fukuoka, Japan;(2) Department of Aerospace Engineeirng, National Defense Academy, 1-10-20 Hashirimizu, 239-8686 Yokosuka, Kanagawa, Japan |
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| Abstract: | The thermal choking phenomenon is of great importance in an inlet isolator in dual-mode ram jet/scramjet combustor. In some cases the choked flow creates a pseudo-shock wave including a shock train in it at the engine inlet and causes large amounts of drag and radically reduces the performance of the engine at high flight Mach numbers. The present paper describes a one-dimensional flow model taking account of the upstream boundary-layer as well as heat addition by using a mass-weighted av- eraging technique. The simple relationships for the flow field in a constant area duct in which the effect of the upstream boundary-layer is considered but the effect of the wall friction in the duct can be neglected are presented. The results of the calculation such as the maximum heat addition when the thermal choking occurs, the downstream Mach number and the static pressure ratio are presented and examined in detail. |
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| Keywords: | thermal chocking boundary-layer one-dimensional model compressible flow |
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