静止扰动的振幅对层流浸没式射流非模态增长的影响

IF 0.5 4区工程技术 Q4 MECHANICS

Journal of Applied Mechanics and Technical Physics Pub Date : 2024-08-21 DOI:10.1134/S0021894424010073

L. R. Gareev, O. O. Ivanov, V. V. Vedeneev, D. A. Ashurov

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引用次数: 0

摘要

摘要本文探讨了引入层流射流的偏转器振幅对静止扰动径向分量线性变化系数的影响。文章介绍了引入和测量扰动的方法。研究表明，偏转器振幅的减小对流动模式没有影响，不能阻止代数增长机制，并导致静止速度扰动的径向分量成比例地减小。在达到与初始扰动振幅无关的某个径向扩展值后，湍流就会形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

EFFECT OF THE AMPLITUDE OF A STATIONARY PERTURBATION ON ITS NON-MODAL GROWTH IN A LAMINAR SUBMERGED JET

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EFFECT OF THE AMPLITUDE OF A STATIONARY PERTURBATION ON ITS NON-MODAL GROWTH IN A LAMINAR SUBMERGED JET

This paper touches upon the effect of an amplitude of a deflector introduced into a laminar jet flow on the linear change coefficient of the radial component of a stationary perturbation. Methods for introducing and measuring the perturbations are described. It is shown that a decrease in the deflector amplitude has no effect on the flow pattern, cannot prevent an algebraic growth mechanism, and causes a proportional decrease in the radial component of the stationary velocity perturbation. Turbulence is established after reaching some radial expansion value that is independent of the initial perturbation amplitude.

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来源期刊

Journal of Applied Mechanics and Technical Physics 物理-力学

CiteScore

1.20

自引率

16.70%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Applied Mechanics and Technical Physics is a journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The Journal presents papers on fluid mechanics and applied physics. Each issue contains valuable contributions on hypersonic flows; boundary layer theory; turbulence and hydrodynamic stability; free boundary flows; plasma physics; shock waves; explosives and detonation processes; combustion theory; multiphase flows; heat and mass transfer; composite materials and thermal properties of new materials, plasticity, creep, and failure.