Condensing Behavior of a Freon Bubble with MPS-MAFL
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摘要: 采用无网格粒子混合法(MPS-MAFL)模拟氟里昂气泡在过冷液池中的冷凝现象,对同一气泡在不同过冷度下的冷凝行为进行敏感性分析,对气泡中含有不凝气体的情况进行分析研究。模拟结果表明:气泡冷凝开始后,冷凝会使气泡内的压力降低,气-液界面开始收缩;在冷凝后期,气泡内压力会超过环境压力;气泡破碎时会产生一个压力脉冲;气泡在一定的过冷度下会产生最大的压力脉冲峰值;当过冷度增大或者减少时,脉冲压力峰值都会降低,并随着过冷度的变化逐渐消失;最大的压力峰值约在3 MPa左右,出现在过冷度20℃左右。
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关键词:
- 粒子法 /
- MPS-MAFL程序 /
- 气泡冷凝 /
- 氟里昂 /
- 过冷液池
Abstract: In the study,MPS-MAFL is used to simulate the phenomenia of a Freon bubble condensing in a subcooled pool.The sensitivity on pool subcooling is also studied to understand the condensation behavior.The simulating shows that the bubble pressure decreases as the condensation begins with the shrinking of the interface.At the later phase of the condensation,the bubble pressure becomes larger than that of the circum-stance.A peak pressure will emerge at the moment that the bubble collapses and there will be a maximum pressure value at a certain subcooling.As the subcooling increases or decreases,the peak pressure will drop and may fade away.The maximum pressure is 3.12MPa at a subcooling about 20℃.-
Key words:
- Moving particle methods /
- MPS-MAFL /
- Bubble condensing /
- Freon /
- Subcooled pool
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