大口径超高速平衡炮膛口流场特性分析

推进技术 ›› 2017, Vol. 38 ›› Issue (5): 992-997.

大口径超高速平衡炮膛口流场特性分析

李子杰,陈健伟,王浩,王健

南京理工大学能源与动力工程学院，江苏南京 210094,南京理工大学能源与动力工程学院，江苏南京 210094,南京理工大学能源与动力工程学院，江苏南京 210094,南京理工大学能源与动力工程学院，江苏南京 210094

发布日期:2021-08-15
作者简介:李子杰，女，博士生，研究领域为大口径超高速火炮流场特性分析。
基金资助:
国家自然科学基金项目(51305204)。

Characteristic Analysis of Muzzle Flow Fields Induced by Large Diameter Ultra-High Speed Balanced Gun

Energy and Power Engineering School，Nanjing University of Science and Technology，Nanjing 210094，China,Energy and Power Engineering School，Nanjing University of Science and Technology，Nanjing 210094，China,Energy and Power Engineering School，Nanjing University of Science and Technology，Nanjing 210094，China and Energy and Power Engineering School，Nanjing University of Science and Technology，Nanjing 210094，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究大口径超高速平衡炮的膛口流场特性，基于有限体积法，采用分块网格划分的整体运动处理方法，结合结构动网格技术，并采用N-S方程结合Realizable k-ε湍流模型，建立了膛口流场二维轴对称数值仿真模型。以300mm平衡炮为例，研究了1.72km/s，794m/s两种速度下的膛口流场特性。计算结果对比表明: 1.72km/s初速的弹丸膛口流场与794m/s初速弹丸膛口流场结构相似，但其射流结构更加明显，流场结构整体略呈“狭长”状，火药燃气速度达到2.5km/s，但不能追赶并包围弹丸，弹丸速度达到Ma=4.03，1.0ms时基本摆脱了流场对其运动的影响。而常规初速弹丸流场结构呈“圆球”状，火药燃气对弹丸的影响较大，作用时间大于超高速发射情况，速度达到Ma=1.27，1.5ms时基本摆脱了流场对其运动的影响。

关键词: 大口径超高速;膛口流场;动网格;特性分析

Abstract: In order to study the flow field characteristics of large diameter ultra-high speed balance gun，a 2-D axisymmetric numerical simulation model was established based on the finite volume method，using the holistic movement of a partitioned mesh processing method，combining with the structured dynamic grid technique，and using navier-stokes equation with realizable k-ε turbulence model. Taking the 300mm balanced gun as an example，the flow field characteristics of two different velocities which one is 1.72km/s and the other is 794m/s were researched. The calculation results show that the flow field of 1.72km/s is similar to that of 794m/s，but the structure is more obvious like“narrow”slightly as a whole. The powder gas velocity reaches 2.5km/s but it can not pursue and surround projectile. The projectile velocity reaches Ma=4.03，and gets rid of the influence of flow field at 1.0ms mostly. But the flow field structure of conventional velocity projectile is like a “ball”，the powder gas makes a greater impact on projectile and the function time is much longer than that of hypervelocity firing. The projectile velocity reaches Ma=1.27，and gets rid of the influence of flow field mostly at 1.5ms.

Key words: Large diameter ultra-high speed；Muzzle flow field；Dynamic mesh；Characteristic analysis

李子杰,陈健伟,王浩,王健. 大口径超高速平衡炮膛口流场特性分析[J]. 推进技术, 2017, 38(5): 992-997.

LI Zi-jie,CHEN Jian-wei,WANG Hao,WANG Jian. Characteristic Analysis of Muzzle Flow Fields Induced by Large Diameter Ultra-High Speed Balanced Gun[J]. Journal of Propulsion Technology, 2017, 38(5): 992-997.

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