离心通风器通风阻力的影响因素  

Influencing factors of flow resistance in oil-air separator

作　　者：徐让书[1,2] 胡慧[1] 邵长浩 牛玲[1,2] 

机构地区：[1]沈阳航空航天大学航空航天工程学部,沈阳110136 [2]沈阳航空航天大学航空航天工程学部辽宁省航空推进系统先进测试技术重点实验室,沈阳110136

出　　处：《航空动力学报》2014年第10期2410-2416,共7页Journal of Aerospace Power

摘　　要：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 flow resistance in the oil-air sep- arator of the aero-engine, flow field in the oil-air separator was caculated numerically using computational fluid dynamics （CFD） and Reynolds stress model （RSM）. The flow resistance of calculation and experiment under the same operating conditions were compared to ensure the applicability of the model. Enough number of flow resistance values of different operat- ing conditions and structures had been calculated for the binary quadratic space trend surface regression. The results show that the increasing of flow rate and rotational speed will bring greater flow resistance. The design of the breather hole eccentricity and the reducing the plate tip radius can reduce the flow resistance, the breather hole eccentricity design has the best eccentricity about 7.5 mm.

关 键 词：航空发动机 离心通风器 通风阻力 回归分析 计算流体力学数值模拟 

分 类 号：V233.4[航空宇航科学与技术—航空宇航推进理论与工程]