低雷诺数下翼型层流分离泡及吹吸气控制数值研究  

Numerical investigation of the laminar separation bubble control by blowing/suction on an airfoil at low Re number

作　　者：刘沛清[1] 马利川[2] 屈秋林[1] 段中喆[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191 [2]中国航天空气动力技术研究院,北京100074

出　　处：《空气动力学学报》2013年第4期518-524,540,共8页Acta Aerodynamica Sinica

基　　金：国家重点基础研究发展计划(973计划)(批准号:2009CB72400101)

摘　　要：在低雷诺数下Eppler387翼型表面会出现层流分离泡现象,因此本文使用Fluent求解器开展吹/吸气控制翼型表面层流分离泡的数值研究,主要探究了射流位置、射流角度、射流速度比三个控制参数对层流分离泡控制的影响规律。研究结果表明,采用与SSTk-ω湍流模型耦合的γ-R槇eθt转捩模型可以准确预测层流分离泡的位置;吹/吸气可以有效抑制低雷诺数下层流分离泡的发展,明显提高低雷诺数下翼型升阻比。固定射流位置,较大吸气速度比和较小吹气速度比可分别获得较好的流动控制效果,且吸气控制比吹气控制对层流分离泡的抑制作用更加有效。A laminar separation bubble appears generally on the Eppler387airfoil at low Reynolds number.In the present paper,control of the laminar separation bubble over the Eppler387airfoil at low Reynolds number using suction or blowing is investigated computationally employing the Fluent solver.Numerical simulations are carried out with a range varities of the key control parameters of jet locations,jet angles and jet velocity ratios.Numerical simulations showed that employing the gamma-theta transition model coupling the SSTk-ωturbulence model can predict the location and extent of the laminar separation bubbles accurately;blowing/suction control is effective in suppressing the laminar separation bubble over the airfoil and increasing the lift-to-drag radio at low Reynolds number obviously.The results with larger suction velocity ratios are better at the fixed suction jet locations while the smaller blowing velocity ratios results are better at the fixed blowing jet locations.Furthermore,suction on the airfoil’s upper surface is more effective to control laminar separation bubbles than blowing control.

关 键 词：低雷诺数 层流分离泡 流动控制 转捩模型 数值模拟 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]