Numerical modeling of the self-oscillation onset near a three-dimensional backward-facing step in a transonic flow


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Abstract

The results of a numerical investigation of the nature of self-oscillation processes occurring in transonic flow past a backward-facing step and a cavity with a flow of the open type are presented. The turbulent flow past the above-mentioned bodies is modeled using the NOISEtte software package intended for solving problems of aerodynamics and aeroacoustics on unstructured grids. The modeling is performed using the eddy-resolving IDDES method that belongs to the class of hybrid RANS-LES approaches. The adequacy of the calculations is confirmed by means of comparing the results obtained with the available experimental data. The structure and the salient features of the self-oscillatory, hydrodynamic-in-nature process, which arises in flow past a cavity and a backward-facing step, are established.

About the authors

B. N. Dan’kov

Central Research Institute of Mechanical Engineering (TSNIIMASH)

Email: Alexey.Duben@gmail.com
Russian Federation, ul. Pionerskaya 4, Korolev, Moscow oblast, 141070

A. P. Duben’

Peter the Great Saint-Petersburg Polytechnic University; Keldysh Institute of Applied Mathematics

Author for correspondence.
Email: Alexey.Duben@gmail.com
Russian Federation, ul. Politekhnicheskaya 29, St. Petersburg, 195251; Miusskaya pl. 4, Moscow, 125047

T. K. Kozubskaya

Peter the Great Saint-Petersburg Polytechnic University; Keldysh Institute of Applied Mathematics

Email: Alexey.Duben@gmail.com
Russian Federation, ul. Politekhnicheskaya 29, St. Petersburg, 195251; Miusskaya pl. 4, Moscow, 125047

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