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Thermophysics and Aeromechanics

2020 year, number 3

Structure of the gas-droplet wall jet injected through round holes into a transverse trench. Comparison of Eulerian and Lagrangian approaches

M.A. Pakhomov, V.I. Terekhov
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Keywords: film cooling, thermal efficiency, gas-droplet wall jet, injection through the holes, trench, numerical simulation

Abstract

The flow structure and thermal efficiency of a gas-droplet wall jet, injected through inclined holes into a transverse trench, is analyzed numerically. The predictions are carried out using three-dimensional RANS equations in the following ranges of two-phase flow parameters: initial droplet size d 1 = 0 -20 mm and their mass fraction M L1 = = 0 - 0.05. Gas turbulence is simulated using the model of Reynolds stress transport taking into account the two-phase character of the flow. The obtained simulation results are compared using the Eulerian and Lagrangian descriptions. The applicability of both approaches to describing the dynamics and heat transfer of a two-phase wall jet is shown.