Theoretical analysis on choking of convergent nozzle flows with boundary layers
Theoretical analysis on choking of convergent nozzle flows with boundary layers
复制标题
边界层收敛喷嘴流阻塞的理论分析
DOI：
10.1299/kikaib.71.2480
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
M. Masuda
中科院分区：
文献类型：
--
作者：
Y. Miyazato;Makiko Yonamine;M. Masuda
为了了解真实的喷管流动的阻塞现象，本文用控制体积法对有边界层的管道流动中的弱激波进行了分析。给出了平面声波作为弱激波极限情况的关系式。文中给出并讨论了考虑边界层时收敛喷管的阻塞和流量系数的判据。结果发现，收敛喷管出口处边界层厚度与喷管半高（或轴对称几何形状中的半径）之比对阻塞条件和流量系数有显著影响。
To understand choking phenomena of real nozzle flows, an analysis of weak shock waves in duct flows with boundary layers has been carried out by the control volume method where an appropriate mean flow is assumed over a given cross section of the flows. Relations for plane sound waves as the limiting case of the weak shock waves are presented. The criteria for choking and discharge coefficients of convergent nozzles taking account of boundary layers are shown and discussed. As a result, it is found that the ratio of the boundary layer thickness to the duct half-height (or radius in axisymmetric geometries) at the nozzle exit of a convergent nozzle significantly affects choking conditions as well as discharge coefficients.