环形隔板结构参数对燃气弹射压力冲击平滑效果影响

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (20) : 193-199.

论文

程洪杰，陈力，赵媛，刘准

作者信息 +

Smoothing effect influence of annular baffle structural parameter on the pressure impact of gas-ejection

CHENG Hongjie,CHEN Li,ZHAO Yuan,LIU Zhun

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文章历史 +

摘要

针对燃气弹射压力双波峰冲击的问题，采用RNG k-ε 湍流模型、有限速率/涡耗散模型和动态分层动网格技术，建立了含运动边界的初容室二次燃烧数值模型。在实验数据验证模型可靠性的基础上，研究了增加环形隔板对平滑压力冲击的有效性，并解耦分析了环形隔板主要结构参数对平滑效果的影响机理，得到了一组较理想的结构参数组合。结果表明，环形隔板能显著降低导弹加速度峰值，随着隔板个数的增加，压力峰值逐渐减小，4个隔板平滑效果最理想；随着最下方隔板布置高度的增加，压力峰值先减小后增加，布置高度为300mm时平滑效果最优；随着隔板间距的增加，压力峰值先减小后增加，间距为200mm时压力峰值最小；合理布置隔板后，导弹加速度峰值减小10.5%，出筒速度降低0.55%，出筒时间延迟2.6%。

Abstract

For double pressure peaks impact of gas-ejection, RNG k-ε turbulence model, Finite-Rate/Eddy- Dissipation model and layering dynamic mesh technique were adopted to establish an initial cavity secondary combustion numerical model with missile movement.Experimental data were used to verify the reliability of model.The effectiveness of smoothing pressure impact through increasing annular baffle was studied.The influence mechanism of main structural parameters of annular baffle on smoothing effect was analyzed by decoupling.A set of ideal structural parameters was obtained.The results show that as the number of annular partitions increases, the pressure peak is gradually reduced and smoothing effect of the four baffles is optimal.As the number of the height of bottom baffle increases, the pressure peak is decreased at first and then increases.When the height is 200mm, the pressure peak reaches the smallest.After baffles are arranged reasonably, the peak value of missile acceleration is reduced by 10.5%, and the velocity out of tube is decreased by 0.55% and the time out of tube is delayed by 2.6%.

导出引用

程洪杰，陈力，赵媛，刘准. 环形隔板结构参数对燃气弹射压力冲击平滑效果影响[J]. 振动与冲击, 2018, 37(20): 193-199

CHENG Hongjie,CHEN Li,ZHAO Yuan,LIU Zhun. Smoothing effect influence of annular baffle structural parameter on the pressure impact of gas-ejection[J]. Journal of Vibration and Shock, 2018, 37(20): 193-199

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