PARAMETRIC STUDY OF DROPLET BREAKUP BEHIND A SHOCK WAVE BY THE SHEET STRIPING MECHANISM

The physical grounds of droplet breakup in a flow behind an incident shock wave in accordance with one of possible sheet stripping mechanisms (shedding of a liquid boundary layer) are considered. The analysis is performed on the basis of data of high-speed shadowgraphy of the droplet behavior behind...

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Bibliographic Details
Published in:Journal of applied mechanics and technical physics 2022-06, Vol.63 (3), p.408-417
Main Author: Poplavski, S. V.
Format: Article
Language:English
Subjects:
Ablation
Applications of Mathematics
Boundary layers
Breakup
Classical and Continuum Physics
Classical Mechanics
Droplets
Fluid- and Aerodynamics
Liquid surfaces
Mathematical Modeling and Industrial Mathematics
Mechanical Engineering
Parameters
Parametric statistics
Physics
Physics and Astronomy
Surface stability
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Summary:The physical grounds of droplet breakup in a flow behind an incident shock wave in accordance with one of possible sheet stripping mechanisms (shedding of a liquid boundary layer) are considered. The analysis is performed on the basis of data of high-speed shadowgraphy of the droplet behavior behind the shock wave in the range of the Weber numbers We = 200–2200, measurements of the breakup induction period, and registration of the ablation character. The condition of instability of the liquid surface by the sheet stripping mechanism and the criterion of interface breakup are formulated with the use of parameters of a conjugate boundary layer in the fluid. On this basis and with due allowance for previous investigations, a dependence of the delay of droplet breakup by this mechanism on the fluid characteristics and flow parameters is derived.
ISSN:0021-8944
1573-8620
DOI:10.1134/S0021894422030051