Contents: 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001

2007, 18

S. S. Voronkov

On velocity of sound and transition to turbulence

language: Russian

received 15.06.2007, published 17.09.2007

Download article (PDF, 260 kb, ZIP), use browser command "Save Target As..."
To read this document you need Adobe Acrobat © Reader software, which is simple to use and available at no cost. Use version 4.0 or higher. You can download software from Adobe site (http://www.adobe.com/).

ABSTRACT

It is shown that some zones of acoustic conductivity appear in centre of canal and near to the wall, when Reynolds numbers correspond to transition to turbulence. The sound velocity in the zones is higher than adiabatic value. Acoustic disturbances propagate in these conductivity zones with higher velocity. It leads to appearance of transverse pressure gradients in the canal and symmetric vortex structures. The results of computing and physical experiments are presented.

Keywords: turbulence, acoustic conductivity, sound velocity, acoustic disturbances

7 pages, 3 figures

Сitation: S. S. Voronkov. On velocity of sound and transition to turbulence. Electronic Journal “Technical Acoustics”, http://www.ejta.org, 2007, 18.

REFERENCES

1. Voronkov S. S. On velocity of sound in viscous gas flow with transverse shift (in Russian). Electronic Journal «Technical Acoustics» http://www.ejta.org 2004, 5.
2. Voronkov S. S. Dependence of the velocity of sound in viscous gas flow on different factors. Collection of works of 16-th session of the Russian acoustic society. Moscow: GEOS, 2005, vol. 1, pp. 262-265.
3. Loytzyansky L. G. Mechanics of Fluid and Gas. 5-th ed. Moscow: Nauka, 1978, 736 pages (in Russian).
4. Lin Tszja-tszjao. Theory of hydrodynamic stability. Moscow: Inostrannaya Literatura, 1958, 194 pages (in Russian).
5. Betchov R., Kriminale W. Questions of hydrodynamic stability. Moscow: Mir, 1971, 350 pages (in Russian).
6. Shlihting H. Theory of border layer. Moscow: Nauka, 1974, 712 pages (in Russian).
7. Turbulence. Fundamentals and Applications. Edited by W. Frost and T. Moulden. Moscow: Mir, 1980, 535 pages, (in Russian).
8. Kachanov Yu. S., Kozlov V. V., Levchenko V. Ya. Onset of turbulence in border layer. Novosibirsk: Nauka, 1982, 151 pages (in Russian).


 

Sergey Voronkov graduated from Leningrad Polytechnic Institute (Russia) in 1979, PhD. Presently he is a head of department of heating engineering and hydraulics at Pskov Polytechnic Institute. Scientific area: hydrodynamics, nonlinear acoustics.

e-mail: kafgid(at)ppi.psc.ru