有叶增压器蜗壳内三维粘性可压缩流场的CFD模拟

为研究有叶蜗壳内的详细流场和其效率提高的可能性，提出了一种对蜗壳和喷嘴环流动区域利用控制容积法对其可压缩、粘性流体三维流场进行CFD数值模拟的方法，并以某增压器为例进行了计算分析。结果表明：这种方法可以清晰地展现模型内部流体压力、温度和度的分布情况，对所计算结果参数进行分析后，可找出模型内流动损失区域和造成损失的原因。以有针对性地对增压器内腔进行优化设计，降低不合适几何形状造成的损失。

CFD Simulation of 3D Viscous Compressible Turbulent Flow in Volute of a Turbocharger

To study the particular flow field and the possibility of improving efficiency, in this paper,a method is presented. The 3D viscous compressible flow in the model of volute and the vanes is simulated by CFD using CVM (control volumes method). And taking some turbocharger as an example, the simulation is carried out. The result shows that the method can display the distribution of pressure, temperature and velocity in the model clearly. The zone and the reasons resulting in loss will be found after analyzing the results, and then we can optimize and redesign the turbocharger purposeful to reduce the losses resulted from improper figure.