文献类型：期刊文献

中文题名：圆形喷嘴平行射流组流体动力学特性

英文题名：The Characteristics of Fluid Mechanics on Multiple CircularParallel Jets

作者：王峻晔[1];章明川[1];任德刚[1];吴东棣[2]

机构：[1]上海交通大学能源工程系,上海200240;[2]华东理工大学机械工程系,上海200232

年份：1998

卷号：13

期号：2

起止页码：229

中文期刊名：水动力学研究与进展（A辑）

外文期刊名：Chinese Journal of Hydrodynamics

收录：CSTPCD;;Scopus;北大核心:【北大核心1996】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：多束射流;射流;分离流;平行射流组;喷嘴

外文关键词：multiple jets, jet, the shear flow,parallel jets.

摘要：本文在簿剪切层理论基础上,建立了平行射流组的理论模型,并依据Prandtl混合长度理论,求出了该模型的分析解。通过该模型的计算分析,得出:(1)沿流动方向轴向速度逐渐衰减,其轴心最大速度衰减与单射流相同;(2)沿y方向,轴向速度按余弦规律分布,并且随着向射流组下游发展,其速度振幅逐渐减少,直到趋于平坦。在离喷嘴足够远的流动相似区,计算结果与实验结果是一致的。
In accordance with the theory of thin shear layer an analytical model is introduced for a parallel-multiple jets. Based on Prandtl's mixing length hypothesis, the analytical solutions for the model are obtained. The results show that (1) the axial velocity decreases slowly along streamline. and the central velocity decreases is in a similar way to that of a single jet ; (2) the distribution of the axial velocity is in a cosine form along the direction parallel to the main channel, its amplitude of velocity decreases slowly, in the flow direction, and finally tends to smooth off. At far downstream distance, the calculated results agree with experimental ones.