竖直管内R113降膜流动数值模拟  

Numerical Simulation on Falling Flow of R113 inside a Vertical Tube

作　　者：王为术[1] 王涛[1] 彭岩 上官闪闪 时小宝 赵冰超[1] 

机构地区：[1]华北水利水电大学热能工程研究中心,郑州450045 [2]中信重工机械股份有限公司,洛阳471003

出　　处：《科学技术与工程》2017年第18期63-68,共6页Science Technology and Engineering

基　　金：国家重点研发计划(2016YFB0601404);河南省科技创新人才杰出青年计划(154100510011);河南省高校科技创新团队支持计划(16IRISTHN017)资助

摘　　要：为研发有机工质余热发电降膜蒸发装置,采用RNG k-ε模型对氟利昂(R113)竖直管内气液两相逆流降膜进行数值模拟。对液膜的流动形态和速度特性进行详细的分析研究。研究发现在沿管长方向的流动过程中,流速呈现出逐渐增大的趋势,但随着流动的发展,这种增势变缓。膜厚由均匀变至厚薄交替并呈现出平稳段、波动段和震荡段三种不同的流动形态,虽然出现震荡波动但无断裂,与理论值对比模拟结果较可靠。For developing falling film evaporation device that is suitable for organic fluid cogeneration, the gas-liquid two-phase countercurrent R113 falling film was simulated by using the RNG k-ε model in the vertical tube.The flow pattern and velocity characteristics of liquid film are analyzed.The results indicate that along the longitudinal direction, the velocity increases and the tendency tends to gently.The film thickness changes from uniform to uneven.Three kinds of flow patterns are founded, which are the steady flow, the wave flow and the shock flow.In the flow process, the liquid has a shock wave but no fracture.Compared with the theoretical value, the simulation results are reliable.

关 键 词：竖直管 降膜 液膜厚度 液膜速度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]