Liquid Film Condensation behind Shock Waves on the Cold Wall of a Diaphragmless Vertical Shock Tube: An Experimental Study

H. D. Zhu; X. Chen; M. Y. Zhang; K. D. Yang; P. Lui; M. Wu; C. Ding; D. J. Liu

doi:10.47176/jafm.15.03.32912

Journal of Applied Fluid Mechanics (Mar 2022)

Liquid Film Condensation behind Shock Waves on the Cold Wall of a Diaphragmless Vertical Shock Tube: An Experimental Study

H. D. Zhu,
X. Chen,
M. Y. Zhang,
K. D. Yang,
P. Lui,
M. Wu,
C. Ding,
D. J. Liu

Affiliations

H. D. Zhu: College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
X. Chen: College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
M. Y. Zhang: College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
K. D. Yang: College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
P. Lui: College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
M. Wu: College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
C. Ding: College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
D. J. Liu: College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China

DOI: https://doi.org/10.47176/jafm.15.03.32912
Journal volume & issue: Vol. 15, no. 3
pp. 781 – 791

Abstract

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The aim of this study was to investigate the condensation of HFC-134a vapor on a shock tube wall behind shock waves. The time-dependent thickness of the condensed liquid film was measured using an optical interference method based on multiple reflections of a laser beam. The condensation on the wall was accompanied by an instantaneous increase in the pressure behind the incident shock wave, and when the reflected shock wave reached the observation window, condensation occurred again. In this experimental study, the characteristics of the diaphragmless vertical shock tube were verified. Reliable experimental data could be obtained using the shock tube. The shock waves could be visualized to study their behaviors in different time periods. The experimental results confirmed the formation of a liquid film on the cold wall of the shock tube after the passing of incident and reflected shock waves, with the liquid film behind the incident shock wave exhibiting a faster formation.

Published in Journal of Applied Fluid Mechanics

ISSN: 1735-3572 (Print); 1735-3645 (Online)
Publisher: Isfahan University of Technology
Country of publisher: Iran, Islamic Republic of
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://www.jafmonline.net/

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