弹道学报2025，Vol.37Issue(3)：33-42,10.DOI:10.12115/ddxb.2024.05002
变外形制导炮弹气动力建模与气动特性分析
Aerodynamic Modeling and Analysis of Aerodynamic Characteristics of Morphing Guided Projectile
邹宇 1史金光 1任华杰 2耿宝魁3
作者信息
- 1. 南京理工大学 能源与动力工程学院,江苏 南京 210094
- 2. 海装沈阳局驻沈阳地区第三军事代表室,辽宁 沈阳 110066
- 3. 西北工业集团有限公司,陕西 西安 710043
- 折叠
摘要
Abstract
In order to maintain a better aerodynamic performance of the guided projectile while facing different flight conditions in the whole flight space and to increase the maximum range of the projectile,the aircraft wing deformation technology was applied to the fixed-wing guided projectile in this paper.Two types of variable shape of the tail of the guided projectile was proposed.The aerodynamic force of the variable shape guided projectile was modeled,and the aerodynamic characteristics of the projectile under different types of variable shape was studied.The aerodynamic data of different profiles of the projectile under various flight conditions were obtained by Datcom software,and the aerodynamic model of the projectile with respect to the Mach number and the angle of attack was obtained by using the nonlinear least squares method to fit the data.The variable profile parameter was introduced to describe the changes of the tail swept-back angle and the spreading length.The polynomial coefficients in the model were quadratically fitted to the relationship between the polynomial coefficients and variable profile parameter to obtain the corresponding aerodynamic model of the projectile with the variable spreading length and the variable swept-back angle.The aerodynamic model was obtained while the shell changing its spread and swept back angle,and the aerodynamic characteristics of the guided shell with different shapes were analyzed by numerical calculation.The results show that,by changing the swept-back angle and spread length of the tail of the guided projectile,the aerodynamic characteristics of the projectile are better than those of the base shape at different flight speeds by improving the lift-to-drag ratio.The aerodynamic model of the guided projectile with variable shape established by the nonlinear least-squares method can quickly and accurately estimate the aerodynamic data of the projectile with different angles of attack,Mach numbers and deformation parameters,which is useful for the trajectory design and computation,control,and control of this type of projectile.It provides a model basis and theoretical reference for the ballistic design and calculation of this type of projectile and the research of control method.关键词
变外形制导炮弹/非线性最小二乘法/气动力模型/气动特性Key words
morphing guided projectile/nonlinear least squares/aerodynamic model/aerodynamic characteristics分类
军事科技引用本文复制引用
邹宇,史金光,任华杰,耿宝魁..变外形制导炮弹气动力建模与气动特性分析[J].弹道学报,2025,37(3):33-42,10.
