Compound-Compressible Nozzle Flow
Compound-Compressible Nozzle Flow
复制标题
复合可压缩喷嘴流量
DOI：
10.1115/1.3607742
复制
发表时间：
1966
期刊：
影响因子：
--
通讯作者：
C. Hevenor
中科院分区：
文献类型：
--
作者：
A. Bernstein;W. Heiser;C. Hevenor
摘要：本文提出了一种基于基本流动关系的一维理论，用于分析一股或多股气流流过单个喷嘴的行为。这种复合可压缩流理论表明，每个流的行为受到其他流的存在的影响。该理论还表明，复合可压缩流的行为是通过确定喷嘴出口平面的变化条件如何影响喷嘴内的条件来预测的。研究发现，复合可压缩流喷管发生阻塞时，存在一个有趣的现象。复合可压缩流在喷管喉部被阻塞，尽管那里的单个气流马赫数不等于1。通过波分析证实了这种现象，波分析表明，当发生阻塞时，即使某些单独气流的马赫数小于1，压力波也不能向上游传播到喷管喉部。基于此复合可压缩流理论的代数方法被用来证明这种方法在计算复合可压缩流喷嘴的行为的有效性。
Abstract : A one-dimensional theory based upon fundamental flow relationships is presented for analyzing the behavior of one or more gas streams flowing through a single nozzle. This compound-compressible flow theory shows that the behavior of each stream is influenced by the presence of the other streams. The theory also shows that the behavior of compound-compressible flow is predicted by determining how changing conditions at the nozzle exit plane affect conditions within the nozzle. It is found that, when choking of the compound-compressible flow nozzle occurs, an interesting phenomenon exists. The compound-compressible flow is shown to be choked at the nozzle throat, although the individual stream Mach numbers there are not equal to one. This phenomenon is verified by a wave analysis which shows that, when choking occurs, a pressure wave cannot be propagated upstream to the nozzle throat even though some of the individual streams have Mach numbers less than one. Algebraic methods based on this compound-compressible flow theory are used to demonstrate the usefulness of this approach in computing the behavior of compound-compressible flow nozzles.