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该文建立了一种刷式密封的3维模型,结合ANSYS系列商用软件,利用计算流体动力学(CFD)方法计算了刷式密封的流场和温度场。研究了刷丝排数对泄漏量的影响,对刷丝排数为14排,厚0.93mm的刷式密封进行了流场和温度场计算,重点研究了刷丝间隙中的流动和刷丝及刷丝间隙中温度分布的细节及规律,讨论了不同工况参数及压差、干涉量、线速度对最高温度的影响。结果表明:随着刷丝排数的增加,泄漏量先呈指数下降,后呈趋缓的线性下降,最后基本趋于稳定。干涉量和线速度对最高温度的影响更为明显。
In this paper, a 3-D model of a brush seal was established. The flow field and temperature field of the brush seal were calculated by CFD method with ANSYS commercial software. The influence of the number of brush filaments on the leakage was studied. The flow field and temperature field were calculated for the brush seal with 14 rows and 0.93 mm brush filaments. The details and rules of the temperature distribution in the wire gap were discussed. The effects of different operating parameters and the pressure difference, the interference and the linear velocity on the maximum temperature were discussed. The results show that with the increase of the number of brush filaments, the amount of leakage decreases exponentially first, then decreases linearly, and finally stabilizes. The effect of interference and linear velocity on the maximum temperature is even more pronounced.