自适应襟翼流动分离控制数值研究  

Numerical Study on Flow Separation Control of Adaptive Flap

作　　者：郝文星[1] 李春[1] 丁勤卫 陈福东 朱海天 HAO Wenxing;LI Chun;DING Qinwei;CHEN Fudong;ZHU Haitian(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Yangpu District,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海市杨浦区200093

出　　处：《中国电机工程学报》2019年第2期536-542,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51676131);上海市科学技术委员会项目资助(13DZ2260900)~~

摘　　要：改善叶片流动分离是提高叶轮机械与飞行器运行效率与安全性的关键。通过在叶片吸力面布置类似鸟类羽毛的自适应襟翼,采用数值模拟的方法,结合SST k-ω湍流模型,模拟了自适应襟翼在一系列攻角和抬起角度下对翼型气动性能的影响,并从宏观气动力与微观流场的角度分析了襟翼改善流动分离的特性与机理。结果表明:襟翼通过影响分离区域大小及翼型表面压力以改变升阻力的大小,进而改善翼型流动分离特性;襟翼处于气动力矩平衡角度时,翼型最大升力系数提升3.9%,处于最佳角度时,翼型最大升力提升12.7%;襟翼在最佳角度时对应的气动力矩一定范围内随最佳角度增大而近似线性增大。实际应用中,这一特点可为采取外力矩约束襟翼运动以提升襟翼流动分离控制能力提供参考。Improving the flow separation performance of blades is critical to the high efficient operation of turbomachinery as well as its safety. An adaptive flap similar to the bird feather was arranged on the blade suction surface. Numerical simulation method using SST k-ω turbulence model was performed to study the effects of flap lifting angles on the airfoil aerodynamic performance with different angles of attack. The flow characteristics and control mechanism were analyzed in terms of the macroscopic aerodynamic force and microscopic flow field. Results show that the varying separation field and the pressure distribution using the flap result in the variation of lift coefficients and drag coefficients, and then improve the flow separation performance of airfoil. The maximum lift coefficient of airfoil increases by 3.9% when the flap was in the condition with equilibrium aerodynamic moments. The maximum lift coefficient of the airfoil can be increased by 12.7% as the flap operated with optimum angles. When the flap operated with optimum angles, the moment coefficient of the flap approximately linear increases with the optimum angle at some extend. In practical application, this characteristics will provide references for the improvement of the flow separation control ability using external moments to constrain the flap motion.

关 键 词：自适应襟翼 流动分离 气动性能 数值模拟 

分 类 号：TM61[电气工程—电力系统及自动化]