Study of the breakup of liquid droplets in the vortex wake behind pylon
at high airspeeds
K.Yu. Arefyev1,2,3, A.N. Prokhorov1,2, and A.S. Saveliev1,4
1Moscow Institute of Physics and Technology, Dolgoprudnyi, Russia
2Baranov Central Institute of Aviation Motors, Moscow, Russia
3Bauman Moscow State Technical University, Moscow, Russia
4Joint Institute for High Temperatures RAS, Moscow, Russia
E-mail: arefyev@ciam.ru, prokhorov@ciam.ru, fisteh@mail.ru
Keywords: high-speed flow, vortex wake, liquid injection, two-phase flow, droplet fractionation
Abstract
The study is devoted to the establishment of regularities in the process
of liquid-droplet breakup in the vortex wake behind pylon at high subsonic
airspeeds. The article describes the laboratory setup, the diagnostic tools, and the experimental procedure. Structure
of the unsteady gas flow behind pylon was examined, and the main
characteristics of the generated vortex wake were evaluated.
Experimental data concerning the variation of droplet diameters in the
gas-dynamic fractionation process versus the flow conditions and liquid
injection regimes were obtained. Typical distributions of droplet diameters and
velocities in the vortex wake behind pylon are reported. A comparison of
experimental data on the rate of the gas-dynamic fractionation process with
calculations made using previously developed evaluation procedures was
performed. The results of the study may prove useful when choosing the
configuration of systems for implementation of liquid injection into a
high-speed flow and, also, for validation of mathematical models intended for
calculation of parameters of two-phase flows.
DOI: 10.1134/S0869864318010055
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