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2004, 5

S. S. Voronkov

On sound velocities in viscous gas flow with transverse shift

language: Russian

received 30.12.2003, published 07.05.2004

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ABSTRACT

At mathematical simulation of wave processes in a gas tract of energy equipment, e.g. compressors, turbines etc, a question arises: is it correctly to use isentropic value of sound velocity. A formula is obtained for velocity of sound in a viscous gas flow taking into account energy dissipation and heat exchange. Essential dependence of sound velocity in shifted flow from disturbance intensity, frequency, flow speed etc. is found out. It is shown the amplitude of sound velocity changing in shifted flow is inversely proportional to amplitude of density disturbance and grows with flow speed increasing. The results of numerical experiment are presented.

7 pages, 3 figures

Сitation: S. S. Voronkov. On sound velocities in viscous gas flow with transverse shift. Electronic Journal “Technical Acoustics”, http://www.ejta.org, 2004, 5.

REFERENCES

1. Newton I. Mathematical Initials in Natural Philosophy. Moscow, Nauka, 687 pages, 1989, (in Russian).
2. Rayleigh. Theory of Sound. T. II. – Moscow: Publishing House of Technical and Theoretic Literature, 475 pages, 1955, (in Russian).
3. Shlihting H. Theory of boundary layer. – Moscow: Nauka, 712 pages, 1974, (in Russian).
4. Loytzyansky L. G. Mechanics of Fluid and Gas. – 5 th ed. – Moscow, Nauka, 736 pages, 1978, (in Russian).
5. Roache P. Computational fluid dynamics. – Moscow, Mir, 616 pages, 1980, (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