吸附式风扇叶栅流场数值模拟

针对某型高性能风扇第2级转子叶片,采用NUMECA商业软件数值模拟的方法,分析了在叶片吸力面距前缘50％和75％弦长处采用吸气技术前后叶栅总压系数、气流转折角和静压升等方面的变化情况.结果表明:在相同攻角相同Ma下,叶栅总压损失随吸气量的增加逐渐降低;叶栅气流转折角随吸气量的增加逐渐交大;叶栅静压升随吸气量的增加逐渐提高;在6°攻角下,在不同Ma下进行吸气,叶栅总压损失都有所降低.

Numerical Simulation of Cascade Flowfield for Aspirated Fan

Based on the second stage rotor blade of a high performance fan, the cascade total pressure coefficient, flow deflection angle and static pressure rise adopted suction technology were analyzed at blade suction side distancing leading edge of 50% and 70% of chord by numerical simulation methods with NUMECA commercial software. The results indicate that the total pressure loss of cascade reduce gradually with the increasing of suction flow rate in the same attack angle and Mach number. The flow deflection angle and the static pressure rise increase gradually with the increasing of suction flow rate. The total pressure loss of cascade was decreased at 6° attack angle and different Mach number.