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本文通过数值模拟的方法研究了雷诺数和攻角对76°大后掠三角翼和50°中等后掠三角翼前缘涡轴向速度的影响.前缘涡速度沿轴向的变化趋势反映了三角翼前缘涡的产生、发展及其演化过程,计算结果表明,后掠角、攻角和雷诺数共同影响前缘涡轴向速度的发展和展向分布特征,其中雷诺数是最重要的影响因素.较高雷诺数下,大后掠三角翼和中等后掠三角翼前缘涡轴向速度呈现出常见的射流型轴向速度分布;而降低雷诺数至105以内时,中等后掠三角翼前缘涡轴向速度剖面为尾流型,大后掠三角翼在较小攻角下也表现出尾流型的特征.
In this paper, the influence of Reynolds number and angle of attack on the axial velocities of the front vortex of 76 ° large swept delta wing and 50 ° mid-swept delta wing was studied by numerical simulation.The variation trend of the front vortex velocity in the axial direction reflected The results show that the sweep angle, the angle of attack and the Reynolds number affect the development of the axial velocity of the leading edge vortex and the distribution characteristics of the vortex, of which the Reynolds number is the most important Under the condition of high Reynolds number, the axial velocity distribution of the front vortex of the large swept delta wing and the middle swept delta wing shows a common jet axial velocity distribution. When the Reynolds number is reduced to less than 105, the mid-swept triangle The leading edge vortex axial velocity profile is wake type, and the large swept delta wing also shows the characteristics of wake type at smaller angles of attack.