航天推进技术研究院主办
[1]赵 娅,袁军娅,任 翔.微喷管中稀薄流动时热力学非平衡现象研究[J].火箭推进,2020,46(03):19-25,40.
ZHAO Ya,YUAN Junya,REN Xiang.Study on thermodynamic non-equilibrium phenomenon of rarefied flow in micro-nozzle[J].Journal of Rocket Propulsion,2020,46(03):19-25,40.
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ZHAO Ya,YUAN Junya,REN Xiang.Study on thermodynamic non-equilibrium phenomenon of rarefied flow in micro-nozzle[J].Journal of Rocket Propulsion,2020,46(03):19-25,40.
微喷管中稀薄流动时热力学非平衡现象研究
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
46
期数:
2020年03期
页码:
19-25,40
栏目:
研究与设计
出版日期:
2020-06-25
- Title:
- Study on thermodynamic non-equilibrium phenomenon of rarefied flow in micro-nozzle
- 文章编号:
- 1672-9374(2020)03-0019-07
- Keywords:
- micro-nozzle; numerical simulation; flow mechanism; work performance; thermodynamic non-equilibrium phenomenon
- 分类号:
- V411.6
- 文献标志码:
- A
- 摘要:
- 微喷管作为微推进系统中的重要部件,其工作性能的研究对于微推进系统的设计有着重要理论指导意义。采用求解带滑移边界条件的N-S方程和直接模拟蒙特卡洛(DSMC)方法,研究微喷管中的稀薄流动,通过设定气体分子转动松弛所需要的松弛碰撞数Zrot研究微喷管中的热力学非平衡现象。结果表明:Kn>0.1时,微喷管中流动开始变得稀薄,连续性假设失效,N-S方程求解结果出现误差; 随着微喷管中流动稀薄程度增加,热力学非平衡现象逐渐明显; 热力学非平衡现象使微喷管内气体内能转化为平动能的量减少,微喷管内速度和推力整体减小; 热力学非平衡现象对微喷管流场影响大于对其工作性能的影响,考虑转动松弛对微喷管内温度场的影响大于速度场
- Abstract:
- As an important component in the micro-propulsion system, the study on the work performance of micro-nozzle has important theoretical guiding significance for the design of the micro-propulsion system. N-S equation with the slip boundary condition and direct simulated Monte Carlo(DSMC)method were used to study the rarefied flow in the micro-nozzle. The thermodynamic non-equilibrium phenomenon in the micro-nozzle was studied by setting the number of relaxation collision Zrot required for the rotational relaxation of the gas molecules. The results show that when Kn>0.1, the flow in the micro-nozzle begins to become rarefied, the continuity assumption fails, and the N-S equation results in errors. With the increase of the flow rarefaction in the micro-nozzle, the thermodynamic non-equilibrium phenomenon is gradually obvious. The thermodynamic non-equilibrium phenomenon reduces the amount of gas internal energy converted into translational kinetic energy in the micro-nozzle, which is followed by the velocity and thrust in the micro-nozzle decreasing. The thermodynamic non-equilibrium phenomenon has greater influence on the flow field of the micro-nozzle than on its working performance. The influence of considering the rotational relaxation on the temperature field is larger than the velocity field in the micro-nozzle
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备注/Memo
收稿日期:2019-08-28; 修回日期:2019-11-11
基金项目:国家自然科学基金(51676010)
作者简介:赵娅(1995—),女,硕士,研究领域为微尺度流动与传热
通信作者:袁军娅(1978—),女,博士,高级工程师,研究领域为高超声速飞行器气动热环境与热防护
更新日期/Last Update:
2020-06-25