| 液体火箭发动机自然循环预冷回路的数值研究 |
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| 引用本文： | 陈二锋,厉彦忠,程向华. 液体火箭发动机自然循环预冷回路的数值研究[J]. 航空动力学报, 2009, 24(3): 698-704 |
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| 作者姓名： | 陈二锋 厉彦忠 程向华 |
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| 作者单位： | 西安交通大学能源与动力工程学院,西安,710049;西安交通大学能源与动力工程学院,西安,710049;西安交通大学动力工程多相流国家重点实验室,西安,710049 |
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| 基金项目： | 教育部高等学校博上学科点专项科研基金,教育部长江学者和创新团队发展计划 |
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| 摘 要： | 针对低温液体火箭发动机预冷自然循环回路的流动与传热过程,建立了一维非稳态均相流数学模型,采用反环状流和弥散流两种流型描述膜态沸腾流型及传热特性.数值计算结果表明:自然循环预冷回路中推进剂流量的不稳定特性是由驱动力——循环回路释热量的不稳定性造成的;预冷过程约80%的管路壁面温度下降由膜态沸腾所引起;反环状流和弥散流膜态沸腾流型的引入,可较好解释回流管壁面温度在预冷过程中的逆向分布规律.
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| 关 键 词： | 低温液体火箭发动机 自然循环 膜态沸腾 流动与传热 |
| 收稿时间： | 2008-03-06 |
| 修稿时间： | 2008-09-16 |
Numerical studies on natural circulation precooling loop of cryogenic liquid rocket engine |
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| CHEN Er-feng,LI Yan-zhong and CHENG Xiang-hua. Numerical studies on natural circulation precooling loop of cryogenic liquid rocket engine[J]. Journal of Aerospace Power, 2009, 24(3): 698-704 |
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| Authors: | CHEN Er-feng LI Yan-zhong CHENG Xiang-hua |
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| Affiliation: | 1.School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China2.State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China |
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| Abstract: | One set of one-dimensional unsteady homogenous mathematic models for flow and heat process of natural circulation precooling loop of cryogenic liquid rocket engine was established,whilst both inverted annular model and dispersed model were introduced for the prediction of filming boiling region.The results indicate the unstable characteristics of circulation flow rate in precooling process is caused by the unstable characteristics of natural circulation driving force,that is,the heat flux transferred to the... |
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| Keywords: | cryogenic liquid rocket engine natural circulation filming boiling flow and heat transfer |
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