Holographic study of shock wave interaction with two oil droplets

D. Igra; Kazuyoshi Takayama

doi:10.1117/12.424338

17 April 2001 Holographic study of shock wave interaction with two oil droplets

D. Igra, Kazuyoshi Takayama

Proceedings Volume 4183, 24th International Congress on High-Speed Photography and Photonics; (2001) https://doi.org/10.1117/12.424338
Event: 24th International Congress on High-Speed Photography and Photonics, 2000, Sendai, Japan

Abstract

This paper reports the results of shock wave loading on two oil droplets positioned in tandem. These oil droplets were suspended one after the other inside the test section of a 60 mm X 150 mm shock tube. They were attached to thin wires that kept their initial position constant. The droplets had an initial diameter of about 1.7 mm, their height was about 3 mm. The droplets shape resembled that of a tear drop. The initial distance between the two wires was 5 mm. A shock wave of Mach number 1.27 in atmospheric air impinged upon the droplets. The corresponding Weber number and Reynolds number were 3,600 and 25,300, respectively. Double exposure holographic interferometry was employed to visualize the flow field around the droplets. Interferograms were taken at various times during the breakup process in order to analyze the interaction between the shock wave and the oil droplets. Due to the high viscosity of the oil droplets their breakup mode was different from that of a water droplet for this Weber number. Stripping type breakup typically occurs for water droplets at this weber number, however the breakup mode of these droplets resembled that of a bag and stamen which usually occurs at much lower Weber number in water droplets.

Citation Download Citation

D. Igra and Kazuyoshi Takayama "Holographic study of shock wave interaction with two oil droplets", Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); https://doi.org/10.1117/12.424338

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