| 引用本文: | 黄奕勇,许军校.超声速气液两相流液化升压装置研究.[J].国防科技大学学报,2009,31(3):1-5,36.[点击复制] |
| HUANG Yiyong,XU Junxiao.Research on the Supersonic Two Phase Flow Liquefaction Equipment[J].Journal of National University of Defense Technology,2009,31(3):1-5,36[点击复制] |
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| 超声速气液两相流液化升压装置研究 |
| 黄奕勇, 许军校 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 基于超声速气液两相流升压原理的水蒸气液化升压装置具有液化迅速、出口压力高的特点，但是两相流升压的物理过程十分复杂，目前分析模型中考虑的参数较少，对细节刻画不够全面。针对这一问题，文章建立了两相流分析模型，考虑了液滴与水蒸气的传热、传质过程，分析了冷却水温度、引射比、混合室收缩比、过冷度和速度滑移比对性能的影响；得到了激波前的压力、干度、空泡份额与引射比的关系，以及凝结激波前后的温度和压力与引射比的关系。计算结果表明：为提高系统性能，需要尽可能地提高液体的雾化程度，降低冷却水的温度，同时将引射比控制在6～8附近；如果设计合理，装置的升压系数可达3倍以上。 |
| 关键词: 两相流 液化 引射 |
| DOI： |
| 投稿日期：2009-02-10 |
| 基金项目:国家自然科学基金资助项目(50406006) |
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| Research on the Supersonic Two Phase Flow Liquefaction Equipment |
| HUANG Yiyong, XU Junxiao |
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(College of Aerospace and Materials Engineering，National Univ. of Defense Technology，Changsha 410073，China)
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| Abstract: |
| Liquefaction scheme based on the supersonic lifting-pressure principle of steam injector has good performance on outlet pressure and liquefaction speed. However, the physical proceed of equipment is very complex; many parameters haven't been contained in the theory equations. The paper established the theory equations which consider the heat and mass transfer between the steam and water. The effects made by the coolant water temperature, injection coefficient, convergent ratio, water undercooling and speed difference are analyzed. The results show that the water should be atomized as smaller as possible, the coolant temperature should be lower, and injection coefficient should be 6～8. If design is correct, the lifting-pressure ratio of the convergent-divergent type steam injector can reach three times than the original. |
| Keywords: two phase flow liquefaction steam injector |
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