高速自旋飞行体的气动加热特性

张俊; 许哲; 贾广臣

doi:10.13224/j.cnki.jasp.2020.10.014

高速自旋飞行体的气动加热特性

doi: 10.13224/j.cnki.jasp.2020.10.014

基金项目: 国家自然科学基金（51775329）；上海市科委创新行动计划(17050502000)；上海海洋大学科技发展专项基金（A2-2006-20-200210）

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出版历程
- 收稿日期: 2020-02-04
- 刊出日期: 2020-10-28

Aero-heating characteristics of flight body with high spinning speed

College of Engineering Science and Technology,Shanghai Ocean University,Shanghai 201306,China

摘要

摘要: 一种典型的弹箭类高速自旋飞行体为例,选取目标在超声速、跨声速、亚声速飞行状态下的弹道计算数据作为来流条件,结合滑移网格和多坐标系法,采用基于密度的耦合隐式算法、Roe-FDS(flux difference splitting)通量格式和SST(shear stress transfer) k -ω湍流模型,对飞行体的外流场进行了热流模拟研究。重点分析了目标在高速自旋飞行条件下的壁面压力、温度、气流密度、热流率、湍流动能等变化规律,并与不考虑飞行体高速自旋的流场进行了对比研究。研究结果表明:在高速自旋飞行条件下,飞行体表面的流线相互干扰,贴壁气流对飞行体产生的扰动更加剧烈,飞行体尾部的气流集聚效应明显,湍流发展与演化过程更加复杂,飞行体壁面的气流速度、压力、温度、热流率均高于无转速飞行情况,尤其在超声速飞行条件下的差异显著。
- 飞行体 /
- 有旋流动 /
- 飞行弹箭 /
- 气动加热 /
- 气动特性 /
- 湍流动能
Abstract: As a typical projectile with high spinning speed was taken as an example, the flight data of the projectile at supersonic, transonic and subsonic states were separately defined as the inflow conditions, and the fluid-thermal analysis was simulated by a combination of sliding mesh and multi-coordinate approaches. The coupling implicit algorithms based on density, Roe-FDS （flux difference splitting） flux scheme and SST (shear stress transfer) k -ω turbulence were also applied in simulations. The pressure, temperature, density,heat flux and turbulent kinetic energy on the surface of the flight body with high spinning speed were studied, and compared with the flow field disregarding the spinning speed. Results demonstrated that the streamlines interfered with each other, and disturbance of the airflow on the surface of the was more intense under the spinning conditions. Moreover, airflow accumulations at the tail of the were obvious, and the development and evolution of turbulence were more complicated. The velocity, pressure, temperature, and heat flux on the surface of the flight body were higher than those disregarding the spinning speed, especially at supersonic regimes.
- flight body /
- spinning flow /
- flying projectile /
- aero-heating /
- aerodynamic characteristics /
- turbulent kinetic energy

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参考文献(21)

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