本文采用雷诺平均Navier Stokes方程和修正Baldwin Lomax代数湍流模型,以Roe二阶流通量差分分裂格式进行离散,数值模拟了典型烧蚀外形的高超声速流场,重点讨论了流动转捩的判定及其与复杂流态的关联。结果表明:数值模拟出的球钝锥外形转捩点位置与工程估算结果符合较好;对工程估算中存在困难的奶头状凹陷烧蚀外形,数值模拟也可给出符合流场结构的转捩点位置。 In this paper, the Reynolds-averaged Navier Stokes equation and the modified Baldwin Lomax algebraic turbulence model are discretized using the second-order Roe differential split scheme, and the hypersonic flow field of a typical ablation profile is numerically simulated. The determination of flow transition and its Associated with complex flow regimes. The results show that the numerical simulation of the obtuse point of the ball obtuse cone shape is in good agreement with the engineering estimation result. There is a difficult nipple shape ablation profile in engineering estimation, and the numerical simulation can also give the position of the transition point consistent with the flow field structure.