| 常重力及微重力下液氢膜态沸腾换热预测 |
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| 引用本文： | 王磊,朱康,马原,谢福寿,厉彦忠.常重力及微重力下液氢膜态沸腾换热预测[J].航空动力学报,2017,32(8):1835-1843. |
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| 作者姓名： | 王磊 朱康 马原 谢福寿 厉彦忠 |
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| 作者单位： | 1.西安交通大学 能源与动力工程学院 制冷与低温工程系，西安 710049 |
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| 基金项目： | 国家自然科学基金（51406142）； 航天低温推进剂技术国家重点实验室基金（SKLTSCP1407）； 陕西省自然科学基础研究计划资助项目（2015JQ5133）; 陕西省博士后科研项目 |
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| 摘 要： | 以液氢膜态沸腾换热为对象，收集并分析文献中涉及液氢膜态沸腾换热的实验数据。通过充分的对比研究，考核3种典型关系式针对液氢膜态沸腾换热预测的适用性与预测精度，建立可预测微重力下液氢膜态沸腾换热热流密度的数学关系式。研究发现:在地面重力下，加热面几何结构、朝向似乎不会对沸腾换热热流密度产生明显影响，均可采用Breen & Westwater公式预测其传热系数；而重力水平会对膜态沸腾换热产生较大影响，且不同重力下换热热流密度之比与重力比之间满足幂指数的关系；依据该关系式可以求解微重力下液氢的膜态沸腾换热热流密度，预测误差控制在15%以内。
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| 关 键 词： | 运载火箭 低温燃料 膜态沸腾 经验公式 微重力 |
| 收稿时间： | 2015/12/11 0:00:00 |
Heat transfer prediction on film boiling of liquid hydrogen under normal gravity and microgravity environments |
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| WANG Lei,ZHU Kang,MA Yuan,XIE Fushou,LI Yanzhong.Heat transfer prediction on film boiling of liquid hydrogen under normal gravity and microgravity environments[J].Journal of Aerospace Power,2017,32(8):1835-1843. |
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| Authors: | WANG Lei ZHU Kang MA Yuan XIE Fushou LI Yanzhong |
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| Abstract: | The film boiling heat transfer of liquid hydrogen was investigated, and the associated film boiling heat transfer experimental data in literatures were selected and analyzed. To validate the applicability and the predictive accuracy of three typical correlations for calculating heat transfer coefficient of film boiling events, a series of comparative studies were conducted. Moreover, a mathematical correlation was proposed to predict the film boiling heat flux of liquid hydrogen under microgravity. It was concluded that under the normal gravity condition, the heater geometries and their directions cannot significantly influence the film boiling heat flux of liquid hydrogen, and Breen & Westwater correlation was recommended to predict the heat transfer coefficient. Analysis of the experimental data shows that gravity has a significant influence on the film boiling heat transfer, and a power law correlation could be obtained to link the heat flux under different gravity conditions. In addition, a comparative study shows the proposed power law correlation allows to get the film boiling heat flux under any gravity condition as long as the heat flux under a similar reference condition has been known, and the predictive deviation is within 15%. |
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| Keywords: | launch vehicle cryogenic fuel film boiling empirical correlation microgravity |
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