试题与答案

进气道冲压比的定义,影响冲压比的因素?

题型:问答题 简答题

题目:

进气道冲压比的定义,影响冲压比的因素?

答案:

参考答案:

进气道的冲压比是:进气道出口处的总压与远方气流静压的比值。冲压比越大,说明空气在压气机前的冲压压缩程度越大。

影响冲压比因素:流动损失,飞行速度和大气温度。(大气密度、高度、发动机转速):当大气温度和飞行速度一定时,流动损失大,则冲压比下降;当大气温度和流动损失一定时,飞行速度越大,则冲压比增加;当飞行速度和流动损失一定时,大气温度上升,则冲压比下降。

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