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为分析航空发动机离心通风器通风阻力的影响因素,应用计算流体动力学(CFD)和雷诺应力模型(RSM)对离心通风器内流场进行数值计算.比较相同工况下通风阻力的计算与试验值,保证模型的适用性.通过计算得到不同工况和结构的足够拟合数量的离心通风器阻力值,对数据进行二元二次空间趋势面回归分析.结果表明:流量和转速的增加都带来更大的通风阻力;通风孔偏心设计与减小辐板顶圆半径可以减小通风阻力,通风孔偏心设计存在最佳偏心距约为7.5mm.
In order to analyze the influencing factors of the ventilation resistance of aero-engine centrifugal ventilator, the computational fluid dynamics (CFD) and the Reynolds stress model (RSM) are used to numerically calculate the flow field in the centrifugal ventilator.Comparing the calculation and experiment of the ventilation resistance under the same conditions Value, to ensure the applicability of the model.By calculating the resistance value of the centrifugal ventilator with a good fit of the number of different conditions and structures, the trend analysis of the data in the binary quadratic space is carried out. The results show that both the flow rate and the speed increase Resulting in greater ventilation resistance. The eccentric design of the ventilation holes and the reduction of the radius of the top circle of the spoke plates can reduce the ventilation resistance. The optimal eccentricity of the ventilation hole eccentricity design is about 7.5mm.