小攻角高超声速钝锥边界层失稳特性
Study of the instability characteristic in the boundary layer of a hypersonic blunt cone at low angle of attack
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摘要: 利用高阶紧致格式,采用直接数值模拟(DNS)和线性稳定性(LST)分析方法,对高超声速边界层的失稳机制和转捩特点进行了研究.通过对马赫数为6的2?攻角高超声速钝锥边界层的稳定性分析发现:小攻角高超声速钝锥边界层存在多枝不稳定模态;周向速度使钝锥的稳定性特征与不考虑周向速度时有本质的差别;转捩线在接近背风面处出现拐折现象是由失稳模态发生转换引起的.Abstract: DNS(direct numerical simulation) and LST(linear stability theory) were employed as tools to study the characteristics of instabilities and transitions in hypersonic boundary layers.The characteristics for flow past a blunt cone in Mach 6 free-stream with 5 half-angle at 2 degree angle of attack (AOA) were analyzed.The results show that there are multi branch instability modes.The instabilities of the blunt cone with the crossflow generated due to AOA is essential different from the cases without the crossflow.The crook in the transition front near the leeward line arises from a transformation between the instability modes.
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Key words:
- hypersonic /
- angle of attack /
- blunt cone /
- boundary layer /
- instability characteristic
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[1] Anderson J D.Hypersonic and high-temperature gas dynamics[M].Virgina:McGraw-Hill Companies,1989. [2] ZHONG X L,MA Y B.Boundary-layer receptivity of Mach 7.99 flow over a blunt cone to free-stream acoustic waves[J].Journal of Fluid Mechanics,2006,556:55-103. [3] Beckwith I E,Creel T R Jr.,Chen F J.Freestream noise and transition measurements on a cone in a Mach 3.5 pilot low-disturbance tunnel[R].NASA Technical Paper 2180,1983. [4] Stetson K F,Thompson E R,Donaldson J,et al.On hypersonic transition testing and prediction[R].AIAA Paper 88-2007,1988. [5] Schneider S P,Matsumura S,Rufer S.Hypersonic stability and transition experiments on blunt cones and a generic scramjet forebody[R].AIAA Paper 2003-1130,2003. [6] 李新亮,傅徳薰,马延文.可压缩尖锥边界层湍流的直接数值模拟[J].中国科学G辑,2008,38(1):89-101. LI Xinliang,FU Dexun,MA Yanwen.DNS of compressible turbulent boundary layer around a sharp cone[J].Science in China G,2008,8(1):89-101.(in Chinese) [7] 苏彩虹,周恒.小攻角高超音速尖锥边界层的转捩预测和e-N法的改进[J].中国科学G辑,2009,39(1):123-130. SU Caihong,ZHOU Heng.The transition prediction of boundary layers on a hypersonic cone at small angle of attack and the improvement of the e-N method[J].Science in China G,2009,39(1):123-130.(in Chinese) [8] TU Guohuai,YUAN Xiangjiang.A characteristic-based shock-capturing scheme for hyperbolic problems[J].Journal of Computational Physics,2007,225(2):2083-2097. [9] Malik M,Balakumar P.Instability and transition in three-dimensional supersonic boundary layers[R].AIAA-92-5049,1992. [10] DiCristina V.Three-dimensional laminar boundary-layer transition on a sharp 8? cone at Mach 10[J].AIAA Journal,1970,8(5):852-856. [11] 袁湘江,周恒.考虑流向曲率和压力梯度的可压缩边界层稳定性分析[J].空气动力学学报,1998,16(3):276-281. YUAN Xiangjiang,ZHOU Heng.Stability of compressible boundary layers with streamwise curvature and pressure grads[J].ACTA Aerodynamics Sinica,1998,16(3):276-281.(in Chinese) [12] Balakumar P,Jeyasingham S.Evolution of disturbances in three-dimensional boundary layers[R].AIAA-2000-014,2000.
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