【摘要】 <正> 一、绪言 在文献[1]中,给出了流经变截面管的粘性振荡流场解,但它是建立在微幅简谐振荡基础上的,而实际的工程问题都是非简谐、非微幅振荡,因此从实验和理论两个方面搞清振荡流的机理,是十分重要的。为此建立了适于研究流动机理的振荡管流试验台,对各种更多还原

【Abstract】 The experimental and numerical results of oscillating flow character In localized narrowing tube is presented in this article. It contains the visualization photograph for comparing the steady flow with the oscillating flow, the .measurement of the oscillating pressure on the tube wail, and numerical method to determine the unharmonic and unsmall amplitude oscillating flow.更多还原