内埋武器机弹分离动态风洞投放试验研究
Dynamic wind tunnel drop testing on internal store separation
姜金俊 1陈连忠1
作者信息
- 1. 中国航天空气动力技术研究院,北京 100074
- 折叠
摘要
基于动力学相似的动态风洞投放试验研究了尖拱圆柱体从空腔中分离的气动及运动特性,并创新性地采用快响应压敏漆技术对动态运动模型表面上的压力分布测量进行初步探索研究,试验中探究了不同空腔模型攻角(α= 0°,-1.5°,-3°)及弹体在空腔内的不同位置(L0 =25 mm,39 mm)对内埋武器机弹分离特性的影响.结果表明:弹体在空腔内的位置对机弹分离运动特性的影响最大,当L0 =25mm时,弹体模型头部区域压力明显高于后部区域压力,产生抬头俯仰力矩,导致弹体模型俯仰角逐渐增大,最终碰撞空腔模型,降低载机攻角并未改变弹体模型碰撞空腔模型的效果.当L0 =39mm时,弹体模型在给定的攻角下均能安全地从空腔中分离.
Abstract
The aerodynamic and motion characteristics of a cylinder separated from a cavity-model were studied by the wind tunnel freedrop testing based on dynamic similarity.The pressure distribution measurement on the surface of the dynamic model was explored by using the fast-response pressure sensitive paint(Fast-PSP).The effects of different attack angle(α=0°,-1.5°,-3°)of the cavity model and different positions of the store in the cavity(L0 =25 mm,39 mm)were studied.The results show that the position of the store in the cavity has the greatest influence on the separation characteristics.When the distance is L0 =25 mm,the pressure on the head-area of the store-model is obviously higher than that in the rear-area,which results in a nose-up pitching moment,increasing the pitch-angle of the store-model and finally collides with the cavity-model.Reducing the angle-of-attack of the cavity-model does not change the effect of the store-model colliding with the cavity-model.When the distance is L0 =39 mm,the store-model can be safely separated from the cavity-model at the given angle-of-attack.
关键词
内埋武器/机弹分离/气动干扰/风洞投放试验/非定常效应Key words
internal weapon/store separation/aerodynamic interference/wind tunnel drop testing/unsteady effect引用本文复制引用
出版年
2024
NETL
NSTL
万方数据