分离式尾缘襟翼翼缝影响机理及其改型研究  

Influence Mechanism of Discrete Trailing-edge Flap Gap on Aerodynamic Performance of the Airfoil and its Modification

作　　者：郝文星 李春[2] HAO Wenxing;LI Chun(School of Mechanical and Electrical Engineering,Shaoxing University,Shaoxing 312000,Zhejiang Province,China;School of Energy and Power Engineering,University ofShanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]绍兴文理学院机械与电气工程学院,浙江绍兴312000 [2]上海理工大学能源与动力工程学院,上海200093

出　　处：《动力工程学报》2020年第10期838-844,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51976131,51676131);上海市“科技创新行动计划”地方院校能力建设资助项目(19060502200)。

摘　　要：针对分离式尾缘襟翼翼缝对翼型气动性能与襟翼调控能力的影响,采用计算流体力学方法结合2种湍流模型从翼型宏观气动力与微观流场结构的角度对不同外形的翼缝进行了研究。在对比分析直翼缝与弯曲翼缝气动性能与流场结构的基础上,对翼缝外形进行了改进,并进一步分析了改进后翼缝的气动性能。结果表明:直翼缝在附着流时升力系数损失大于弯曲翼缝,而分离流时其延缓失速能力较强;改进翼缝能很好地贴合流体流动状态,相对于直翼缝,附着流时其升力损失较小;对于襟翼的载荷调控能力,未改进翼缝使襟翼调控能力有所减弱,改进翼缝不影响襟翼在正方向偏转时的调控能力。To study the effects of discrete trailing-edge flap gaps on aerodynamic performance of the airfoil and on the control ability of the flap,the gaps in different shapes were researched based on macroscopic mechanics and microscopic flow field structure of the airfoil using computational fluid dynamics(CFD)combined with two turbulence models.The profile of the gap was then modified by comparing the aerodynamic performance and flow field structure of the non-contoured gap and contoured gap,and subsequently the aerodynamic performance of the modified flap was further analyzed.Results show that the loss of lift coefficient in attached flow caused by non-contoured gap is greater than the contoured gap,but in separated flow,the non-contoured gap has stronger capability in stall delay.The improved flap can well fit the fluid flow state;compared with the non-contoured gap,the lift loss of contoured flap in attached flow is smaller.As for the control ability of the flap,the unimproved gap weakens the control ability of the flap,but does not affect the control ability when the flap deflects in the positive direction.

关 键 词：尾缘襟翼 襟翼翼缝 外形改进 气动性能 调控能力 计算流体力学 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]