Numerical simulation of the piston effect in superheated liquid R134a

doi:10.7523/j.issn.2095-6134.2018.04.004

Abstract

Abstract: In this paper, a model of one-dimensional cavity filled with meta-stable superheated liquid R134a is built to investigate influence of the piston effect (PE). Numerical simulation method is used in boundary condition of a temperature jump. The PE is caught in the superheated liquid by solving energy transport equation of compressible fluid. Then the equivalent thermal conductivity of PE is calculated. Furthermore, the influence of liquid superheat degree on piston effect is investigated. The higher the superheat degree is, the stronger the PE effect is. In conclusion, the piston effect is capable of carrying higher heat flux and speeding up thermal equilibrium in superheated liquid of R134a. The equivalent thermal conductivity of PE is obviously superior to pure heat conduction, and the equivalent thermal conductivity of PE is tripled.

Key words: superheated liquid, R134a, piston effect, numerical simulation

CLC Number:

TK121

HUANG Caifeng, LI Yuhua, LI Zhigang, GUO Chaohong, JIANG Yuyan. Numerical simulation of the piston effect in superheated liquid R134a[J]. , 2018, 35(4): 451-456.

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