绕管式换热器壳侧汽化模拟时的液滴粒径研究.

The Euler model that attaches to the ANSYS CFX software is used to simulate the ethane shear and vaporizing flow on the shell-side of spiral wound heat exchanger (SWHE). The diameter of the disperse liquid particle that influences the phase interactions in the governing equations is investigated. Based on the energy conservation, formula for the average diameter of the disperse liquid particle is deduced. The heat ratio of phase change is proposed to compute simply the liquid particle average diameter so that the shear and vaporizing flow on the shell-side of SWHE could be simulated accurately and within the deviation of ±20%. The heat ratio of phase change is mainly influenced by the shell-side operating parameters including inlet quality and pressure, hence a formula of the heat ratio of phase change is fitted by both shell-side inlet quality and vapor density variables. The formula of the heat ratio of phase change is also applicable under different conditions such as mass velocity and heat flux variation. [ABSTRACT FROM AUTHOR]