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弹箭与制导学报 >

2025 , Vol. 45 >Issue 1: 26 - 33

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2025.01.004

基于仿真的旋转稳定动不平衡弹丸气动特性

  • 毕思健 ,
  • 王雨时 ,
  • 王光宇
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  • 南京理工大学机械工程学院,江苏 南京 210094
王雨时(1962—),男,教授。E-mail:

毕思健(1998—),男,硕士研究生。E-mail:

收稿日期: 2024-06-04

  网络出版日期: 2025-03-12

基金资助

基础加强计划重点项目(2019-JCJQ-ZD-144-00)

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Aerodynamic Characteristics of Dynamic Imbalance Spin-stabilized Projectile Based on Simulation

  • BI Sijian ,
  • WANG Yushi ,
  • WANG Guangyu
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  • School of Mechanical Engineering, Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China

Received date: 2024-06-04

  Online published: 2025-03-12

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摘要

为了给引信外弹道环境分析提供参考,应用FLUENT仿真软件对大口径旋转稳定动不平衡底凹弹的气动特性进行数值模拟,得到该弹丸全弹道气动参数,并利用1stOpt软件拟合得到了其与动不平衡角和马赫数的函数关系。研究发现:动不平衡角对阻力系数的影响在2%内;升力系数、翻转力矩系数和极阻尼力矩系数均与弹丸动不平衡角线性正相关;马格努斯力系数和马格努斯力矩系数则与弹丸动不平衡角线性负相关;当动不平衡角为1°时,相比于无动不平衡角,极阻尼力矩系数增大约2~4倍。

关键词： 旋转弹丸; 动不平衡角; 气动特性; 外弹道环境; 数值模拟

本文引用格式

毕思健 , 王雨时 , 王光宇 . 基于仿真的旋转稳定动不平衡弹丸气动特性[J]. 弹箭与制导学报, 2025 , 45(1) : 26 -33 . DOI: 10.15892/j.cnki.djzdxb.2025.01.004

Abstract

In order to provide reference for the analysis on exterior ballistic environment of fuze, FLUENT software is applied to numerically simulate the aerodynamic characteristics of a large caliber dynamic imbalance spin-stabilized projectile with base cavity, and corresponding aerodynamic characteristics of the whole trajectory are obtained. The function relationship of aerodynamic characteristics, dynamic imbalance angle with Mach number of the projectile is fitted 1stOpt software. The influence exerted by dynamic imbalance angle on drag coefficient is small and within 2% lift coefficient, overturning moment coefficient and polar damping moment coefficient are positively linearly correlated with dynamic imbalance angle of the projectile while Magnus force coefficient and Magnus moment coefficient are negatively linearly correlated with dynamic imbalance angle of the projectile. When dynamic imbalance angle is large (such as 1°), polar damping moment coefficient will increase 2~4 times compared with that dynamic imbalance angle is zero.

Key words： spinning projectile; dynamic imbalance angle; aerodynamic characteristics; exterior ballistic environment; numerical simulation

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