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过程工程学报 ›› 2019, Vol. 19 ›› Issue (3): 524-532.DOI: 10.12034/j.issn.1009-606X.218281

• 流动与传递 • 上一篇    下一篇

内置涡流发生器的管内过冷沸腾与强化换热的模拟

陈鑫1,2, 肖颀3, 管小平2, 杨宁2*   

  1. 1. 中国石油大学(北京)化学工程学院,北京 102249 2. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京 100190 3. 武汉第二船舶设计研究所热能动力技术重点实验室,湖北 武汉 430064
  • 收稿日期:2018-08-27 修回日期:2018-11-21 出版日期:2019-06-22 发布日期:2019-06-20
  • 通讯作者: 杨宁

Simulation of enhanced heat transfer in subcooled boiling tube of vortex generator inserts

Xin CHEN1,2, Qi XIAO3, Xiaoping GUAN2, Ning YANG2*   

  1. 1. School of Chemical Engineering, China University of Petroleum (Beijing), Beijing 102249, China 2. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3. Science and Technology on Thermal Energy and Power Laboratory, Wuhan 2nd Ship Design and Research Institute, Wuhan, Hubei 430064, China
  • Received:2018-08-27 Revised:2018-11-21 Online:2019-06-22 Published:2019-06-20

摘要: 采用欧拉双流体模型结合RPI沸腾模型对高压管内过冷沸腾进行三维非稳态模拟,考察了涡流发生器对管内过冷沸腾的影响,模拟了高压下光管内的过冷沸腾、层流下内置涡流发生器的换热管内的流动和湍流下内置涡流发生器的换热管内的过冷沸腾。结果表明,内置涡流发生器的换热管在层流状态下换热能力明显提升,过冷沸腾时管内换热能力有一定提升,且壁面附近的气泡由于扰流作用被大量卷入锥形片内,降低了壁面附近产生气膜的可能性,延迟了过冷沸腾起始点的位置。

关键词: 过冷沸腾, RPI沸腾模型, 涡流发生器, 计算流体力学, 气液两相流

Abstract: An Eulerian?Eulerian two-fluid model together with the RPI boiling model was used to simulate the three-dimensional unsteady subcooled boiling flow in high pressure tubes. The effect of vortex generator on the subcooled boiling was investigated through the simulation. The tube fluid dynamics of vortex generator in laminar flow and the subcooled boiling process with the vortex generator in turbulent flow were simulated. The simulation indicated that the heat transfer capacity was obviously enhanced under laminar flow conditions by the vortex generator. The heat transfer capacity in the tube was only slightly improved in the case of subcooled boiling, and the bubbles near the wall were affected by the disturbance of the fluid. The bubbles near the wall surface were largely entangled into the delta wing due to the disturbance of the fluid. Therefore, the possibility of generating a gas film near the wall surface was reduced, and delayed the starting point position of subcooled boiling.

Key words: subcooled boiling, RPI boiling model, vortex generator, computational fluid dynamics, gas?liquid flow