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为研究离心机内部的流动状况 ,采用矢量分裂的有限体积法对强旋转流场中激波进行计算。通过选用二阶总变差减小 (TVD)格式 ,很好地捕捉到了障碍物前方的激波。讨论了在不同气体介质及不同强度的旋转流场中障碍物对激波性质的影响。计算表明 :在障碍物附近 ,随着速度的升高 ,激波强度增强。激波在障碍物两侧有延伸 ,在侧壁高密度区域的激波强度在高马赫数时减弱 ;中心低密度区域由于存在回流 ,使得这一部分气体密度急剧升高。通过数值计算可以为离心机设计提供参考。
In order to study the flow inside the centrifuge, the finite volume method of vector splitting was used to calculate the shock wave in the strong rotating flow field. By choosing the second order total variation reduction (TVD) format, the shock in front of the obstacle is well captured. The effects of obstacles on the properties of shock waves in different gas media and rotational flow fields with different intensities are discussed. The calculation shows that the intensity of the shock wave increases with the increase of the velocity near the obstacle. The shock wave extends on both sides of the obstacle, and the shock intensity in the high-density region of the sidewall decreases at high Mach numbers. Due to the backflow in the central low-density region, the shock intensity of this part of the gas sharply increases. The numerical calculation can provide reference for centrifuge design.