高速转动圆盘流动数值模拟研究
发布时间：2018-10-20 16:44
【摘要】：重点研究高速离心压气机叶轮与机匣间的间隙流动及其温度分布。研究将离心压气机简化为高速转动圆盘,搭建了相关实验平台,并开展了相应的数值模拟研究。通过改变转动圆盘的转速和轴向进入的冷却流的流量,研究了转速和流量对于间隙内温度和速度分布的影响。结果显示,转速是影响温度变化的最主要因素,转速越大,温度越高;同等幅度的流量变化对温度的影响则较小。研究发现,在实验和模拟对应的大雷诺数条件下,无量纲的速度分布基本不受到圆盘转速、冷却流量和温度场的影响。
[Abstract]:The gap flow and temperature distribution between impeller and casing of high speed centrifugal compressor are studied. The centrifugal compressor is simplified as a high speed rotating disk, and a related experimental platform is set up, and the corresponding numerical simulation research is carried out. The effects of rotation speed and flow rate on the temperature and velocity distribution in the gap were studied by changing the rotational speed of the rotating disc and the flow rate of the axial flow. The results show that the rotational speed is the most important factor affecting the temperature change, the higher the rotational speed is, the higher the temperature is, and the less the change of flow rate of the same amplitude is to the temperature. It is found that the dimensionless velocity distribution is not affected by the disk speed, cooling flow rate and temperature field under the experimental and simulated conditions of large Reynolds number.
【作者单位】： 清华大学航天航空学院;
【基金】：国家自然科学基金(11272183)资助项目
【分类号】：O357.5
，
本文编号：2283755
[Abstract]:The gap flow and temperature distribution between impeller and casing of high speed centrifugal compressor are studied. The centrifugal compressor is simplified as a high speed rotating disk, and a related experimental platform is set up, and the corresponding numerical simulation research is carried out. The effects of rotation speed and flow rate on the temperature and velocity distribution in the gap were studied by changing the rotational speed of the rotating disc and the flow rate of the axial flow. The results show that the rotational speed is the most important factor affecting the temperature change, the higher the rotational speed is, the higher the temperature is, and the less the change of flow rate of the same amplitude is to the temperature. It is found that the dimensionless velocity distribution is not affected by the disk speed, cooling flow rate and temperature field under the experimental and simulated conditions of large Reynolds number.
【作者单位】： 清华大学航天航空学院;
【基金】：国家自然科学基金(11272183)资助项目
【分类号】：O357.5
，
本文编号：2283755
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