【摘要】 文中以数值求解 N-S 方程组为出发点,详细探讨了粘性绕流模拟中的网格生成技术、N-S 方程的数值求解方法以及湍流模型的求解与应用。结合代数方法和求解椭圆型偏微分方程方法发展了一种复杂外形的高质量结构化粘性网格生成技术。在有限体积方法的基础上,采用改进的中心离散格式并基于 Baldwin-Lomax 湍流模型,通过求解 N-S 方程组精确地数值模拟了包括三维机翼、三维翼身组合体在内的亚、跨声速流场。更多还原

【Abstract】 At the basis of numerically solving N-S equations,the present work is mainly focused on the grid generation in viscous flow field,deeper numerically solving of N-S equations,the choosing of turbulence model. Solving the elliptic grid generation with an algebraic method marching along the normal-to-wall direction,viscous grids around complex geometries are generated.The boundary-layer grids with the algebraic method is othogonality and easy to control the distance to the wall.And finite volume methods,Baldwin-Lomax turbulence model,and the centered difference with artificial viscosity by Jameson is adopted to numerically simulate the subsonic、transonic flow field through solving N-S equations.更多还原