Wall Effects in Shock Tube Flow
Wall Effects in Shock Tube Flow
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激波管流中的壁效应
DOI：
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发表时间：
1958
期刊：
影响因子：
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通讯作者：
D. B. Wheeler
中科院分区：
文献类型：
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作者：
R. J. Emrich;D. B. Wheeler
为了研究激波管流动中的壁面效应，对激波强度、管中平均密度和壁面压力进行了测量。这些测量结果与Trimpi和Cohen以及Mirels和Braun的明确预测进行了比较。在这些理论应该适用的条件下，它们预测激波衰减和流动变量的值足够好，以证明基本上正确的假设，即激波产生的湍流边界层类似于定常流动中观察到的边界层，壁效应产生的波可以被认为是一维的。然而，在某些情况下缺乏定量的一致性，这表明需要对这些理论进行一些修改。观察到热气体和冷气体的相当大的混合发生。既没有理论试图解释混合，也没有考虑它对波传播的影响。
In order to study wall effects in shock tube flows, measurements have been made of shock strength, of average density across the tube, and of pressure at the walls. These measurements are compared with explicit predictions of Trimpi and Cohen and of Mirels and Braun. Under conditions where the theories should apply, they predict shock attenuation and values of the flow variables sufficiently well to justify as essentially correct the assumptions that the turbulent boundary layer produced by the shock is similar to the boundary layer observed in steady flows and that waves generated by wall effects can be considered as one‐dimensional. A need for some modification of the theories is indicated, however, by lack of quantitative agreement in certain cases. Considerable mixing of the hot and cold gases is observed to occur. Neither theory attempts to explain the mixing nor takes into account its effects on wave propagation.