The Drag Reduction Design for Transonic Airfoil with Consideration of Laminar Transition

摘要：

The effect of laminar transition on the drag reduction design of transonic airfoil is investigated in this paper. Full eN transition prediction model coupled with RANS solver is used to automatically determine transition position. Gradient-based optimization method is adopted for modification of airfoil profile. The gradient for optimization is obtained by adjoint method with fixed angle of attack. In order to examine the effect of laminar transition on optimization, two flow conditions are considered in the present paper for airfoil drag reduction design. Airfoil of RAE2822 taken as example is optimized with full turbulence model and full eN transition prediction model respectively. Then, the two kinds of designed airfoils are verified under the same flow condition. The results show that whether the flow condition for test is full turbulent or transitional flow the airfoil designed with consideration of laminar transition gives smaller drag than airfoil designed with full turbulence model does. Therefore, it is beneficial that taking transition prediction into consideration in the optimization design process.

关键词： drags reduction optimization airfoils transonic flow linear stability analysis laminar flow boundary transition flow computational fluid dynamics

作者: Wang Long Song Wenping Zhang Kun Yang Xudong

作者单位: National Key Laboratory of Science and Technology on Aerodynamic Design and Research,Northwestern Polytechnical University,Xian 710072, China

会议类型: 国际会议

会议名称: 2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)

会议地点: 西安

会议语种:英文

页码: 279-282

在线出版日期: 2010-09-01（万方平台首次上网日期，不代表论文的发表时间）