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Title:
热化学非平衡流动中黏性干扰和化学反应对HB2 气动力的影响
Alternative Title: Effect of viscosity and chemical reactions on aerodynamic force in chemical nonequilibrium flow
Author: 李康; 胡宗民; 姜宗林
Source: 中国科学:物理学 力学 天文学
Issued Date: 2014-12
Volume: 45, Issue:4, Pages:044702-1~044702-11
Abstract:
已知研究认为, 相比冻结流动下的压力值, 热化学非平衡条件下HB2 模型扩张裙体部分压力的偏大是由黏性干扰引起的. 研究探讨了黏性干扰和高温气体效应对HB2 扩张裙体部分压力的影响规律.数值求解了有限速率的N-S 方程, 化学反应模型考虑了5 种组分、17 个基元反应, 并采用Park T-Tv 双温度模型求解. 对比扩张裙体部分压力对黏性干扰和化学反应的敏感性发现, 热化学反应流动中扩张裙体部分压力的偏大并非由黏性的改变引起, 而是由化学反应所主导. 对比流动各参量对压力的贡献值发现, 压力上升速率增加主要来源于温度项的贡献.
English Abstract: The present work deals with the sensitivity of aerodynamic force to variations in viscous coefficients and chemical reaction rates in thermochemical nonequilibrium flow over HB2 model. Within this scope, numerical simulations are conducted by varying the viscous coefficients and chemical reaction rates over their uncertainty range. The numerical method uses Park's two-temperature model for the description of thermochemical nonequilibrium processes and solves the full N-S equations for a multicomponent reacting gas mixture. The effect of variations in viscous coefficients and chemical reaction rates on pressure coefficient on the flare skirt part shows a big difference. The thicker boundary layer is not the reason for pressure becoming higher on the flare part. It is found that the main contribution to the pressure increase in the nonequilibrium case is the change of temperature due to chemical nonequilibrium, but not the increase of viscous coefficient.
Keyword: 高焓热化学非平衡 ; 黏性干扰 ; HB2 模型 ; 压力系数 ; 化学反应边界层
Language: 中文
Indexed Type: CSCD
Corresponding Author: 姜宗林
Correspondent Email: zljiang@imech.ac.cn
Related URLs: 查看原文
ISSN: 1674-7275
Subject: 流体力学 ; 流体力学::空气动力学 ; 流体力学::非平衡流 ; 流体力学::计算流体力学
CSCD ID: CSCD:5369748
Department: LHD激波与爆轰物理
Classification: 二类
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/49647
Appears in Collections:高温气体动力学国家重点实验室_期刊论文

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Recommended Citation:
李康,胡宗民,姜宗林. 热化学非平衡流动中黏性干扰和化学反应对HB2 气动力的影响[J]. 中国科学:物理学 力学 天文学,2014-12-01,45(4):044702-1~044702-11.
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文件名: 热化学非平衡流动中黏性干扰和化学反应对HB2气动力的影响.pdf
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