摘要
为了充分发挥附面层抽吸对叶栅流动的控制作用,通过数值模拟,将两种典型的附面层抽吸槽布局与不同弯曲叶片相结合以研究复杂三维气动布局对扩压叶栅气动性能的影响。全叶高的吸力面抽吸能有效抑制吸力面中部的附面层发展,对降低叶栅主流损失最为有效;结合一定的叶片正弯曲,在叶片吸力面吸除进口流量2.27%的流体,最优的弯曲吸附式叶栅能将主流损失下降37.35%;但吸力面抽吸对角区分离的控制作用有限,裕度并未得到有效拓宽。紧贴于吸力面的端壁抽吸能有效吸除端区的低能流体,通过对角区分离的针对性控制,有效拓宽叶栅的工作范围;结合较小的叶片弯曲,仅在端区吸除进口流量1.48%的流体,便可将叶片的有效正攻角提高129.7%。
To give full play to the control action of boundary layer aspiration on the flow in cascades, by numerical simulations, two kinds of typical aspiration configurations with different curved blades were combined to study the effect of complex three-dimensional aerodynamic layouts on the aerodynanfie performance of compressor cascades. The fully spanwise suction surface aspiration can effectively suppress the development of the boundary layer on the suction surface near the midspan and is the most effective in reducing the main flow loss of the cascade. Combining with blade positive curving, removing 2.27% of the inlet flow, the optimum curved aspirated cascade can reduce the main flow loss by 37.35%. However, the control effect of suction surface aspiration on the corner separation is limited, and the margin can not been effectively broadened. The endwall aspiration which are close to the suction surface can effectively remove the low momentum fluid near the corner. With tile targeted control towards the corner separation, endwall aspiration effectively expands the working incidence range of the cascade. Combing with a smaller blade curved angle, only removing 1.48% of the inlet flow near the corners, the effective incidence of the cascade can be increased by 129.7%.
作者
丁骏
王松涛
朱伟
徐皓
王仲奇
DING Hun;WANG Song-Tao;ZHU Wei;XU Hao;WANG Zhong-Qi(Engine Aerodynamics Research Centre,Harbin lnstitute of Technology,Harbin 150001,China;Hangzhou Turbine Power Group Co.,Ltd.,Hangzhou 310016,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2018年第10期2152-2158,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51706052
No.51706051
No.51776048
No.51436002)