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Numerical Simulation of Turbulent Flow Control at Pipe Inlet to Advance Flow Relaminarizationстатья
- Авторы: Lushchik V.G., Makarova M.S., Reshmin A.I.
- Журнал: Fluid Dynamics
- Том: 58
- Номер: 1
- Год издания: 2023
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 57
- Последняя страница: 71
- DOI: 10.1134/S0015462822601954
- Аннотация: Various methods of flow relaminarization in a pipe are considered by means of controlling the average and turbulent flow parameters. For numerical simulation of flows with turbulence growth and suppression it is proposed to use a three-parameter RANS turbulence model, which has shown good results in modeling existing experiments on relaminarization. Calculations for three variants of inlet devices with different velocity profiles and the same small-scale turbulence at the inlet show the possibility of achieving flow relaminarization in pipes at Reynolds numbers Re > 10000. Among three variants of inlet devices considered, the most effective one is the variant with organization of a two-zone flow with slow flow in the central region of the pipe and accelerated flow in the near-wall region. In this version, relaminarization occurs up to the Reynolds number Re* = 16000. It is shown that decrease in the turbulence intensity and scale leads to an even larger value of the relaminarization Reynolds number Re*. This work is supported by the Russian Science Foundation under grant no. 20-19-00404.
- Добавил в систему: Решмин Александр Иванович