| 黏性对高压空气弹射装置内弹道性能的影响 |
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| 引用本文： | 邵亚军,张炜,高钦和,杨正伟,管文良.黏性对高压空气弹射装置内弹道性能的影响[J].航空动力学报,2017,32(8):1933-1942. |
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| 作者姓名： | 邵亚军 张炜 高钦和 杨正伟 管文良 |
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| 作者单位： | 1.火箭军工程大学 动力工程系,西安 710025 |
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| 基金项目： | 国家自然科学基金（51475462, 51575516, 51305447） |
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| 摘 要： | 针对高压空气弹射装置中,气体黏性流动造成的内耗散和沿程损失对内弹道性能的影响,结合高压下空气黏度公式,重点考虑低压室内的黏性流动,得到了未充分发展黏性流体在非定常状态下的能量损失计算方法。基于高压空气真实气体效应分析,建立了考虑气体摩擦的高压空气弹射内弹道数学模型,进行了数值求解。对比结果表明:气体摩擦效应对快速、瞬时过程造成的干扰量较小,对象宏观特性变化不大,低精度系统中可忽略不计。通过对结果的规律性进行探究,发现摩擦效应降低了有用功的转化率,减缓了气体膨胀速率,造成低压室压力的非均匀分布、高压室到低压室的质量流量波动和弹体初始时刻的碰撞。
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| 关 键 词： | 高压空气 黏性 弹射系统 内弹道模型 摩擦损失 |
| 收稿时间： | 2016/3/21 0:00:00 |
Influence of viscosity on interior ballistics of high-pressure air ejection device |
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| SHAO Yajun,ZHANG Wei,GAO Qinhe,YANG Zhengwei,GUAN Wenliang.Influence of viscosity on interior ballistics of high-pressure air ejection device[J].Journal of Aerospace Power,2017,32(8):1933-1942. |
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| Authors: | SHAO Yajun ZHANG Wei GAO Qinhe YANG Zhengwei GUAN Wenliang |
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| Abstract: | The gas viscous flow in the high-pressure air ejection device causes energy dissipation and pressure loss,and may change the performance of the interior ballistics. An energy loss calculation method was obtained for the non-fully developed unsteady flow. An interior ballistic model was established on the basis of the real gas effects for the high-pressure air ejection device under the gas friction effects. The numerical experiments were performed. The results show that the gas friction effects cause little errors for the quick gas expansion,and the performance of the missile changes not too much. The gas friction effects can be ignored in the low precision system. However,the law curves show that the gas friction effects reduce the energy quality,and slow down the gas expansion rate. Besides,the gas friction effects make the pressure in the low pressure chamber unequal,and generate the mass flowrate fluctuation from high pressure chamber to low pressure chamber. The missile collision occurs because of the gas friction. |
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| Keywords: | high-pressure air viscosity ejection system interior ballistic model friction loss |
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