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采用RNGk-ε两方程紊流模型和Simple算法,利用Fluent软件对蜂窝密封内的三维流动情况进行了数值模拟,从压比、蜂窝芯格尺寸、蜂窝深度、蜂窝壁厚等因素分析蜂窝密封的泄漏流动特性.结果表明:蜂窝密封特殊的六边形蜂窝结构可以将泄漏流分割成许多小涡流,气体在蜂窝腔中呈逆时针螺旋式三维紊流运动;随着压比的增大,蜂窝密封泄漏量增加,压比越大,泄漏量增加的趋势减缓;蜂窝芯格尺寸小,泄漏流被分割成小涡流的个数多,密封间隙摩阻效应大,泄漏量减少;蜂窝深度增大,泄漏量减少,蜂窝深度大于4mm时,泄漏量减少的趋势减缓;随着蜂窝壁厚的增加,泄漏量略有减少.
The two-equation turbulence model RNGk-ε and the Simple algorithm were used to simulate the three-dimensional flow in the honeycomb seal by using Fluent software. From the pressure ratio, honeycomb core size, honeycomb depth, honeycomb wall thickness and other factors, The results show that the hexagonal honeycomb structure can divide the leakage flow into many small vortices and the gas presents anticlockwise spiral three-dimensional turbulent flow in the honeycomb cavity. With the increase of the pressure ratio, the honeycomb The leakage rate increases, the pressure ratio increases, the leakage rate tends to increase; the honeycomb core size is small, the leakage flow is divided into a small number of small eddy currents, the sealing gap friction effect is large, reduce the leakage; honeycomb depth increases , The amount of leakage is reduced, and when the honeycomb depth is greater than 4 mm, the trend of decrease of the amount of leakage slows down; as the honeycomb wall thickness increases, the amount of leakage slightly decreases.