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

BI Sijian; WANG Yushi; WANG Guangyu

doi:10.15892/j.cnki.djzdxb.2025.01.004

Journal of Projectiles, Rockets, Missiles and Guidance >

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

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

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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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

Cite this article

BI Sijian , WANG Yushi , WANG Guangyu . Aerodynamic Characteristics of Dynamic Imbalance Spin-stabilized Projectile Based on Simulation[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2025 , 45(1) : 26 -33 . DOI: 10.15892/j.cnki.djzdxb.2025.01.004

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