Theory of film condensation on shock-tube endwall behind reflected shock wave. (Part II: Theoretical basis for determination of condensation coefficient)
Theory of film condensation on shock-tube endwall behind reflected shock wave. (Part II: Theoretical basis for determination of condensation coefficient)
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反射激波后激波管端壁薄膜凝结理论。
DOI：
10.1002/(sici)1520-6556(1996)25:3
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
N. Takasugi
中科院分区：
文献类型：
--
作者：
S. Fujikawa;M. Kotani;N. Takasugi
本文讨论了用激波管测定水蒸气凝结系数的理论基础。本文根据作者的气体动力学理论，分析了反射激波后激波管端壁的膜状凝结。明确了在液膜生长期间存在过渡现象，即，在冲击波反射之后液膜立即与时间成比例地生长，并且在过渡时间之后，液膜与时间的平方根成比例地生长。这些生长之间的过渡现象是由端壁处热传导特性的变化引起的。阐明了在转捩前必须确定凝结系数的原因。
We are concerned with the theoretical basis for the determination of the condensation coefficient of vapor by means of a shock tube. Film condensation on the shock-tube endwall behind a reflected shock wave is analyzed on the basis of the first author's gas-dynamics theory. It is clarified that there exists a transition phenomenon during the growth of a liquid film, that is, the liquid film grows in proportion to time immediately after the reflection of the shock wave, and after a transition time, it grows in proportion to the square root of time. The transition phenomenon between these growths is caused by the change in heat conduction characteristics at the endwall. The reason why the condensation coefficient must be determined before the transition is clarified.