Abstract: The probability of using ramjet at high Mach number flight for the aerospace-plane was discussed and the ramjet characteristics using liquid hydrogen, methane and propane as fuel was calculated and analyzed in detail. The diamond-shaped ramjet operating zone, the engine characteristics and the matching relation among basic cross-sections etc were presented in the paper.The results show that the ramjet performance meets the demand of aerospace-plane on propulsion system in the range of Ma = 2-6 and H = 0-40km and not only liquid hydrogen, but also methane and propane may be used as fuel for the ramjet under certain conditions.

Key words: Variable geometry jet engine;Hypersonic ramjet;Jet propulsion;Space shuttle main engine;Fuel;Hydrogen fuel

摘要： 本文论证了高M_α数亚燃冲压发动机用于航天飞机的可能性。并对用液氢、甲烷、丙烷等作为燃料的冲压发动机特性作了详细的计算分析。讨论了冲压发动机的工作菱形区、发动机特性及各截面的协调关系等问题。计算结果表明,在M_α=2～6及H=0～40km范围内,亚燃冲压发动机能满足航天飞机对动力装置的要求。在一定的条件下,液氢、甲烷和丙烷均可以被选为航天飞机用的冲压发动机的燃料。

关键词: 变几何形状喷气发运机;高超音速冲压喷气发动机;冲压推进;航天飞机主发动机;燃料;氢燃料