混合动力机车动力间的热力学分析及结构优化

Thermodynamic Analysis and Structure Optimization of Hybrid Locomotive Power Compartment

以混合动力机车动力间通风系统为研究对象,在初始方案基础上提出两种通风系统优化方案:方案1为去掉动力间侧墙百叶窗,保留侧墙换气扇;方案2为同时去掉动力间侧墙百叶窗和换气扇。利用计算流体动力学软件ANSYS-FLUENT对动力间内部的湍流性能和熵产进行热力学分析。计算结果表明:包括初始方案在内的3种方案动力间内部平均温度均低于设计要求,但方案1可以显著增强动力间内冷却空气的湍流性能,对于迅速降低动力间内部温度更为有效,从而提高动力间通风系统的散热性能。

Taking the power compartment ventilation system of hybrid locomotive as the research object,two optimization schemes of ventilation system are put forward on the basis of the initial scheme.One is to remove the side-wall blinds and retain the side-wall ventilation fans;the other is to remove the side-wall blinds and ventilation fans.Thermodynamic analysis of turbulence performance and entropy generation in dynamic interaction was carried out by using computational fluid dynamics software ANSYS-FLUENT.The results show that the average temperature of the three schemes which including the initial scheme is all lower than the design requirement temperature,but the first scheme can significantly enhance the turbulence performance of the cooling air in the power room,and is more effective for rapidly reducing the internal temperature of the power compartment,thereby improving the heat dissipation performance of the power compartment ventilation system.