Numerical simulations on dynamic stall of a complex motion of airfoil under unsteady freestream velocity

被引：0
|
作者：
Xie K. [1 ]
Laith K.A. [1 ]
Chen D. [1 ]
Yang F. [1 ]
Rui X. [1 ]
机构：
[1] Institute of Launch Dynamics, Nanjing University of Science and Technology, Nanjing
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2019年 / 40卷 / 05期
关键词：
Computational fluid dynamics; Dynamic stall; Helicopter rotor airfoil; Lagging motion; Overset grid; Pitching motion; Plunging motion;
D O I：
10.11990/jheu.201711100
中图分类号：
学科分类号：
摘要：
This study aims to simulate a 2D helicopter SC1095 airfoil under Re=3.92×106 using an SST k-ω turbulence model with transitive correction and overset grid technology for the dynamic stall problem when the helicopter is flying forward. Based on the condition of the pure pitching motion under unsteady free-steam velocity, the effects of phase difference and amplitude on dynamic stall are analyzed when the plunging and lagging motions are superimposed, respectively. Then, the effects of the plunging and lagging motions on the dynamic stall angle are compared. Results show that an increase in the phase difference value during the plunging and lagging motions may advance the occurrence of dynamic stall and increase the lift coefficient peak when amplitude is fixed. When the phase angle is fixed, an increase in the amplitude of the plunging and lagging motions delays the occurrence of dynamic stall and reduces the peak value of the lift coefficient. The effect of plunging motion on the dynamic stall angle of a pure pitching airfoil under unsteady freestream velocity is more dominant than that of the lagging motion. The computation methods and research results in this paper provide reference for the prediction of dynamic stall behavior of airfoil under multi-degree of freedom coupled motions. © 2019, Editorial Department of Journal of HEU. All right reserved.
引用
收藏
页码：865 / 871
页数：6
相关论文
共 19 条
  • [1] Carr L.W., Progress in analysis and prediction of dynamic stall, Journal of Aircraft, 25, 1, pp. 6-17, (1988)
  • [2] Zhao G., Zhao Q., Wang Q., Simulations and parametric analyses on unsteady dynamic stall characteristics of rotor airfoil based on CFD method, Acta Aerodynamica Sinica, 33, 1, pp. 72-81, (2015)
  • [3] Lin Y., Huang J., Huang S., Et al., Experimental investigation of rotor airfoil dynamic stall characteristics, Aeronautical Science & Technology, 4, pp. 25-28, (2012)
  • [4] Pierce G.A., Kunz D.L., Malone J.B., The effect of varying freestream velocity on dynamic stall characteristics, Proceedings of the 32nd Annual National Forum of the American Helicopter Society, (1976)
  • [5] Leishman J.G., Beddoes T.S., A semi-empirical model for dynamic stall, Journal of the American Helicopter Society, 34, 3, pp. 3-17, (1989)
  • [6] Mcalister K.W., Lambert O., Petot D., Application of the ONERA model of dynamic stall. NASA technical paper 2399, (1984)
  • [7] Shao M., Yang M., Chen F., Numerical simulation study on dynamic stall characteristics of rotor airfoil, Computer Simulation, 29, 7, pp. 70-74, (2012)
  • [8] Mccroskey W.J., Carr L.W., Mcalister K.W., Dynamic stall experiments on oscillating airfoils, AIAA Journal, 14, 1, pp. 57-63, (1976)
  • [9] Geissler W., Raffel M., Dietz G., Et al., Helicopter aerodynamics with emphasis placed on dynamic stall, Wind Energy, pp. 199-204, (2007)
  • [10] Gharali K., Johnson D.A., Numerical modeling of an S809 airfoil under dynamic stall, erosion and high reduced frequencies, Applied Energy, 93, pp. 45-52, (2012)
12