Aerodynamic characteristics of co-flow jet wing with simple high-lift devices

作     者：Zhenhao ZHU Tianhang XIAO Haolin ZHI Shuanghou DENG Yujin LU Zhenhao ZHU;Tianhang XIAO;Haolin ZHI;Shuanghou DENG;Yujin LU

作者机构：College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2022年第35卷第10期

页      面：67-83页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：the National Natural Science Foundation of China (No. 11672133) the Fundamental Research Funds for the Central Universities, China (No. kfjj20180104) support from Rotor Aerodynamics Key Laboratory, China (No. RAL20190202-2/RAL20190101-1) 

主　　题：Active flow control Co-flow jet Continuous injection Discrete injection slot Simple high-lift device 

摘      要：Numerical investigations are conducted to explore the aerodynamic characteristics of three-dimensional Co-Flow Jet(CFJ) wing with simple high-lift devices during low-speed takeoff and landing. Effects of three crucial parameters of CFJ wing, i.e., angle of attack, jet momentum and swept angle, are comprehensively examined. Additionally, the aerodynamic characteristics of two CFJ configurations, i.e., using open and discrete slots for injection, are compared. The results show that applying CFJ technique to a wing with simple high-lift device is able to generate more lift,reduce drag and enlarge stall margin with lower energy expenditure due to the super-circulation effect. Increasing the jet intensity can reduce the drag significantly, which is mainly contributed by the reaction jet force. The Oswald efficiency factor is, in some circumstances, larger than one,which indicates the potential of CFJ in reducing induced drag. Compared with clean wing configuration, using CFJ technique allows the aerodynamic force variation less sensitive to the swept angle, and such phenomenon is better observed for small swept angle region. Eventually, it is interesting to know that the discrete slotted CFJ configuration demonstrates a promising enhancement in aerodynamic performance in terms of high lift, low drag and efficiency.