Internal flows of dense gases
Internal flows of dense gases
复制标题
稠密气体的内部流动
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
A. Kluwick
中科院分区：
文献类型：
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作者：
A. Kluwick
本文以无粘喷嘴流动和层流边界层流动为例，讨论了大比热稠密气体内部流动的特性。在第一种情况下，我们证明了稀疏激波可能是完全允许的。结果还表明，从亚音速状态到超音速状态的转变可能需要一种相当不寻常的喷管形状，它有两个喉部，而不是一个喉部。在绝热壁面条件下，能量方程在描述层流边界层中起着次要的作用。外部超音速流场中马赫数的非单调变化可能会产生稀薄气体中不可能产生的新效应。
Summary.The properties of internal flows of dense gases having large specific heats are discussed on the basis of two prototypical examples: inviscid nozzle flows and laminar boundary-layer flows. In the first case it is shown that rarefaction shocks may be completely admissible. Also it is shown that the transition from a subsonic to a supersonic state may require a rather unusual nozzle shape having two throats rather than a single throat. Under adiabatic wall conditions the energy equation is found to play a minor role in the description of laminar boundary layers. New effects not possible in dilute gases are seen to result from the non-monotonous Mach number variation in external supersonic flow fields.