Parameter optimization research on lift-enhancing of multi-element airfoil using air-blowing
Based on the response surface methodology and the grid method combining with numerical simulation of Reynolds-averaged Navier-Stokes equations,the lift-enhancing optimizations of three-element airfoil parameters and its air-blowing flow control parameters are carried out.The finite volume method is adopted to discretize the Reynolds-averaged Navier-Stokes equations in space,the second-order upwind scheme is used in time advance,and SST k-ω turbulence model is used to compute turbulence viscosity.The objective function is obtained with the response surface methodology,and the optimal solution is made using nonlinear programming with the grid method.On the base of multi-element airfoil parameter optimization,the influencing parameters of air-blowing effect are analyzed and selected,the optimization design variables are determined as the air-blowing slot locations,angles and air-blowing momentum coefficients,and lift-enhancing aerodynamic optimization of air-blowing flow control parameters on multi-element airfoil is completed.It is shown from the results that the optimization method combining response surface methodology with the grid method is fit for parameter optimization of multi-element airfoil and its flow control with air-blowing on the flap for lift-enhancing; the flow around the multi-element airfoil can be well controlled and its aerodynamic performance is greatly improved,then the maximum lift coefficient achieves 4.9589 which is usually the maximum lift coefficient of the five-element airfoil; after optimization the air-blowing slot angles are of about 20° on the trailing edge flaps and the air-blowing momentum coefficients of slots exist an optimum value.
multi-element airfoil air-blowing flow control numerical simulation response surface methodology
Yuqin Jiao Yan Lu
National Key Laboratory of Science and Technology on Aerodynamic Design and Research,Northwestern Polytechnical University,Xian 710072,China
国际会议
2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)
上海
英文
1-9
2014-09-24（万方平台首次上网日期，不代表论文的发表时间）