底排弹底排装置内流场的数值模拟

THE NUMERICAL SIMULATION OF FLOWFIELD WITHIN BASE BLEED DEVICE OF IHE BASE BLEED PRLJECTILE

利用不可压缩Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程组，耦合入ｋ－ε模型，对底排装置内流场作了数值模拟，得到了其内部时均速度场和压力场的详细公布规律，分析了底排装置内流场的结构特征及内部压力分布特片，并指出了形成压主力分布不均匀直接原因。计算结果可为底排装置内弹道研究提供有价值的数据和分析结论。

On the basis of Navier Stokes equations,the flowfield within base bleed device (BBD)is numericaly simulated by coupling with the k εequation.The detailed distribution laws of the velocity and pressure field inside BBD are obtained.The constructure characteristics of the interior flowfield of BBD and its pressure distribution are also analyzed.Further more,the direct reason of the inhomogeneous pressure distribution is given.The calculation results in the paper can not only provide sone valuable datum and conclusions for researching the interior ballistics of BBD,but also supply the real and reliable boundary conditions for the numerical calculation of the flowfield in the base zone.