Synthetic Jet Control on the Propulsion Behavior of a Foil in Plunge-pitch Motion  

作　　者：Yadong Li Guoqing Zhou Jie Wu 

机构地区：[1]Liaoning General Aviation Academy,Shenyang Aerospace University,Shenyang 110136,China [2]College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China [3]State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Journal of Bionic Engineering》2020年第2期303-314,共12页仿生工程学报（英文版）

基　　金：The authors acknowledge the support of the National Natural Science Foundation of China(Grant No.11622219);the Natural Science Foundation of Jiangsu Province(Grant No.BK20191271);This work is also supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).

摘　　要：The Synthetic Jet(S J)control on the propulsion behavior of a foil in plunge-pitch motion is examined in this work by numerical simulations.An elliptic foil with ratio of 8 performs the plunge and pitch motions synchronously.A pair of SJs with the same frequency and strength is integrated into the upper and lower surfaces of the foil.As a result,the local flow field around the foil could be obviously modified by the SJs.At the Reynolds number of 200,the effects of the inclined angle between the jet direction and the chord line,the phase angle between the SJs and the flapping motion as well as the location of SJ on the propulsion performance are systematically investigated.Compared with the pure plunging and pitching foil,it is indicated that the enhancement of mean thrust and propulsive efficiency can be obtained by the SJs with suitable working parameters.Based on the numerical analysis,it is found that the jet flow on the foil surfaces,which changes the local pressure distribution to increase the pressure difference between upper and lower surfaces,can benefit the propulsion behavior of the flapping foil.

关 键 词：PROPULSION BEHAVIOR plunge-pitch motion ELLIPTIC FOIL SYNTHETIC jet 

分 类 号：O35[理学—流体力学]