柴油机水下排气口气液两相流动状态研究  

The Two－Phase Flow Pattern of Submerged Exhaust of Diesel Engine

作　　者：张文平 张天元[2] 刘志刚[2] 张志华[2] 马强[2] 

机构地区：[1]哈尔滨工程大学31~#312教研室,哈尔滨市150001 [2]哈尔滨工程大学

出　　处：《内燃机工程》1996年第3期14-18,共5页Chinese Internal Combustion Engine Engineering

基　　金：国防科工委基金

摘　　要：利用摄像机拍摄和重放，观察和研究柴油机水下排气从管口到水面气液两相流动状态及管口气泡形成、上浮和破碎整个物理过程。发现，整个两相流动状态可明显地分成气泡形成、自由气泡、气泡云及水面喷涌四个区域。若对两相流动状态的轮廓平均，则类似于浮力射流结构。水介质以一定速度流动时，从水下排气口到水面气液两相流的流动状态相似，而流动轨迹与静水中的情况不同。In this paper, the authors observed and studicd process of bubbleforming, floating and breaking, and two－phase flow pattern from submerged exhaust outlet of diesel engine to water surface by means of TV camera's replay.It is found that the two－phase flow pattern from the outlet to the surface can beobviously devided into four regions, i. e. bubble formation, free bubble, bubbleswarm and spout or splash. The outline of the two－phase flow pattern outsidethe exit is similar to the one of buoyant jet. As the outlet in running water, thetwo－phase flow pattern of submerged exhaust is similar to that in still water, except the flow wake.

关 键 词：水下排气口 排气口 两相流动 柴油机 

分 类 号：TK421.3[动力工程及工程热物理—动力机械及工程]