Unsteady laminar gas flows in an annular nozzle

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• 作者：V. A. Levin ; N. E. Afonina ; V. G. Gromov ; I. S. Manuilovich&#8230
• 刊名：High Temperature
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：54
• 期：6
• 页码：837-841
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Atoms and Molecules in Strong Fields, Laser Matter Interaction; Materials Science, general; Classical and Continuum Physics; Physical Chemistry; Industrial Chemistry/Chemical Engineering;
• 出版者：Pleiades Publishing
• ISSN：1608-3156
• 卷排序：54

文摘

On the basis of the Navier–Stokes equations, a parametric study of the influence of various factors on the development of initial perturbations caused by starting an air-blown annular nozzle is performed for the laminar model of flow. Flow regimes are found in which the start perturbations accompanying the initiation of the nozzle do not attenuate but pass to a quasi-periodic mode. The frequency Fourier spectrum of pressure fluctuations at the center of the thrust wall and the value of the thrust of the nozzle are determined. Typical pulsed pressure signals obtained in the calculation model and detected in the experiments are presented.