华中科技大学学报（自然科学版）2013，Vol.41Issue(2)：31-35,5.
基于ELM的动力排气系统喷雾降温研究
Study of cooling engine exhaust systems with water spray by using ELM
摘要
Abstract
The water spray cooling the hot exhaust gas in a water-collecting box (WCB) of engine exhaust systems was investigated. The flow and thermal equations of gas-droplets two-phase flow were solved by an Eulerian-Lagrangian method (ELM), The effect of tubes' structure on the characteristics of temperature and pressure drops of WCB, and the effect of spray flux on the temperature drop of exhaust gas were analyzed. The predicted results were validated by the available experimental data. The bended-tube model, within which the outer tube length was less than inner one, is testified better than other ones. As the water spray flux increased? the gas temperature, the relative evaporation rate of water droplets and the resistance loss of exhaust gas tend to decrease. When the spray flux rises to the value of 0. 04 kg/s, the increase of spray flux can not make the gas temperature decrease any longer.关键词
喷雾降温/气/雾两相流/欧拉-拉格朗日方法/排气系统/集水箱Key words
spray cooling/ gas-droplets two-phase flow/ Eulerian-Lagrangian method/ exhaust system/ water-collecting box (WCB)分类
能源科技引用本文复制引用
王小川,贺国..基于ELM的动力排气系统喷雾降温研究[J].华中科技大学学报（自然科学版）,2013,41(2):31-35,5.基金项目
国防预研基金资助项目(101050202). （101050202）
