配内燃机车离心风机的设计改型

利用商业软件Fluent对配内燃机车离心风机内部气流的流动情况进行了数值模拟。模拟结果与实验结果对比表明，两者能够较好的吻合，误差在5％以下。在此基础上，对风机内部的流场分布，尤其是沿叶高方向气流的流动情况进行了分析，找到了导致风机效率较低的原因，并有针对性地对风机进行了改型。改型后的模拟结果显示，风机的效率提高了6％左右，效率提升较为明显。

Remolding design of DF8CJ centrifugal fan

In this paper, a numerical simulation of the air flow pattern in the DF8CJ centrifugal fan was carried out using the commercial software Fluent. Experimental data from platform experiments indicate a well fit between the results from simulation and experiments, and the difference is below 5%. Based on the simulation, the inner flow field, especially the air flow status along the height of the blade, was analyzed. The main reason for a low efficiency of the DF8CJ centrifugal fan was thus found and a remoldin...