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三角翼的双襟翼控涡作用的数值模拟研究
引用本文:袁礼,忻鼎定.三角翼的双襟翼控涡作用的数值模拟研究[J].力学学报,2000,32(2):151-158.
作者姓名:袁礼  忻鼎定
作者单位:1. 中国科学院计算数学与科学工程计算研究所,科学与工程计算国家重点实验室,北京,100080
2. 北京航空航天大学流体力学研究所,北京,100083
基金项目:国家自然科学基金!19393100,航空科学基金!96105A003B
摘    要:对装有“前端襟翼”和“前缘襟翼”的74°后掠三角翼的不可压缩流场作了数值模拟,以研究襟翼的旋涡控制作用.数值模拟是用拟压缩性方法求解一般曲线坐标系下的三维不可压缩Navier-Stokes方程,时间离散用向后Euler差分,空间无粘项的离散用二阶迎风TVD格式,所得的离散方程用对角化形式的近似隐式因子分解格式求解.湍流模型用Baldwin-Lomax代数模式.计算了三种平面形状的机翼在迎角范围为10°~50°的绕流和气动特性.计算和实验的比较表明,襟翼向下偏转可以推迟旋涡破裂,且对提高机翼的减阻能力、升阻比和改善失速前后的气动特性有明显效果,双襟翼具有更佳的控涡效果.

关 键 词:双襟翼控涡作用  三角翼  高速飞行器  数值模拟
收稿时间:1999-6-9

NUMERICAL SIMULATION OF THE EFFECTS OF VORTEX CONTROL BY USING BI-FLAP SYSTEM ON A DELTA WING
Yuan Li,Hsing Tingding.NUMERICAL SIMULATION OF THE EFFECTS OF VORTEX CONTROL BY USING BI-FLAP SYSTEM ON A DELTA WING[J].chinese journal of theoretical and applied mechanics,2000,32(2):151-158.
Authors:Yuan Li  Hsing Tingding
Abstract:Numerical simulation of the incompressible flow past a 74 delta wing equipped with an apex flap and a leading-edge flap was conducted to investigate the effects of vortex control by using such a hi-flap system. The three-dimensional incompressible Navier-Stokes equations in curvilinear coordinates were solved by using pseudo-compressibility method. The implicit approximatelyfactorized scheme was utilized to solve the discrete equations resulting from the application of backward Euler difference for time derivative and second-order upwind TVD scheme for inviscid terms. Baldwin-Lomax turbulence model was used. Flowfields past three kinds of planform and the resulting aerodynamic characteristics were computed for 10 ~ 50 range of incidence. The comparison of numerical and previous experimental results shows that vortex breakdown can be delayed, and drag reduction, lift/drag ratio and other aerodynamic characteristics near stall can be improved by drooping the flap downward. The hi-flap system has its performance superior to NASA leading-edge flap system or a single delta wing.
Keywords:hi-flap control  detached vortex  incompressible N-S equations  pseudo-compressibilty method  turbulence  
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