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研究了动力排气系统集水箱内高温烟气的喷雾降温问题.基于欧拉-拉格朗日方法(ELM)对烟气与水雾两相流的流动和能量方程进行求解计算.分析了集水箱内部分流管的结构对集水箱温降和压降特性的影响,以及喷雾流量对烟气温降的影响,并通过实验数据对仿真结果进行了校验.结果表明:内层管长大于外层管长的弯管结构模型的综合特性较好;随着喷雾流量的增加,烟气温度、水雾的相对蒸发率和烟气进出口压差均呈降低趋势;当喷雾流量为0.04kg/s时,未蒸发的水雾量增加,继续增加喷雾流量,烟气温度变化不明显.
The spray cooling of high temperature flue gas in the exhaust system of a power exhaust system was studied.The flow and energy equations of two phase flue gas and water mist flow were calculated and solved based on the Euler-Lagrange method (ELM) The influence of the structure of partial flow tube inside the water tank on the temperature drop and pressure drop of the water collecting tank and the influence of the spray flow on the temperature drop of the flue gas are also verified by the experimental data.The simulation results show that the inner tube grows longer than the outer layer With the increase of spray flow rate, the flue gas temperature, the relative evaporation rate of mist and the pressure drop of flue gas inlet and outlet showed a decreasing trend. When the spray flow rate was 0.04kg / s , The amount of water vapor that did not evaporate increased, continue to increase the spray flow, flue gas temperature change is not obvious.