水工结构中的空化问题-《郑州大学学报(工学版)》

文章信息/Info

Author(s):: Huang Jianbo;; East China Institute, East China, Ma’anshan City, Anhui,

摘要:: 本文从N—S方程及气泡运动与扩散生长方程出发,建立了描述紊流场中气核空化过程的统一数学模型,并据此导出了流场空化相似准则。指出空化相似包括宏观与微观相似两个方面,空化过程实际上是气核从微观尺度向宏观尺度转化的过程,在建立空化起始判据、空化相似准则时,均需考虑这一特点。本文的分析表明,要在减压实验条件下对原型空化进行相似模拟是非常困难的,数值模拟与实验模拟相结合,是解决水利工程中面临的空化现象“比尺影响”问题的可行途径。

Abstract:: This article starts from the N -S equation and bubble movement and diffusion growth equations. It has established a unified mathematical model describing the gasification process in the gone flow field, and exported similar guidelines for the flowing field as empty. It is pointed out that the similarity of airification includes two aspects: macro and micro similarity. The process of vacation is actually the process of transforming the gas nucleus from micro -scale to macro scale. When establishing an empty starting judgment and similar guidelines, this feature must be considered. The analysis of this article shows that it is very difficult to simulate the prototype airification under decompression experimental conditions. The combination of numerical simulation and experimental simulation is a feasible way to solve the problem of "comparison" problems faced in water conservancy projects.