Starting characteristics of hypersonic pre-cooled turbojet inlet
Starting characteristics of hypersonic pre-cooled turbojet inlet
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DOI：
10.2514/6.2015-3595
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
T. Kojima;H. Taguchi;Hiroaki Kobayashi;Tetsuya Sato
中科院分区：
文献类型：
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作者：
T. Kojima;H. Taguchi;Hiroaki Kobayashi;Tetsuya Sato
在这项研究中，估算了高超声速预冷涡喷发动机重新启动可变进气时的旁路门面积。通过半比例进气模型的超音速风洞试验，获得了可变进气口的总压恢复和质量捕获率。通过发动机直连点火试验，获得了预冷器的压力损失和温度效率。利用这些结果，估计了旁路门可以启动进气的面积。重新启动进气的旁路门区域取决于预冷器的冷却能力。发动机燃用液氢时，旁通门面积为1800 mm~2000 mm(ABYP_ENG/A0=0.26~0.29)。如果预冷器的冷却剂为液氮，则旁通门的面积为2600 mm~2700 mm(ABYP_ENG/A0=0.37~0.39)。
In this study, bypass door area for the Hypersonic Precooled Turbojet Engine to restart the variable intake is estimated. Total pressure recovery and mass capture ratio of the variable air intake is acquired by the supersonic wind tunnel testing of the half scale intake model. Pressure loss and temperature effectiveness of the precooler is acquired by direct connect firing tests of the engine. Using these results, area of the bypass door by which the intake can start is estimated. The bypass door area to restart the intake depends on the precooler’s cooling capability. If the engine runs on liquid hydrogen, area of the bypass door is 1800mm~2000mm (Abyp_eng/A0=0.26~0.29). If the liquid nitrogen is used for the coolant of the precooler, area of the bypass door is 2600mm~2700mm (Abyp_eng/A0=0.37~0.39).