The investigation of vortex chamber aerodynamics

Author

Volchkov, E.P. ; Dvornikov, N.A. ; Lebedev, V.P. ; Lukashov, V.V.

Author_Institution

Inst. of Thermophys., Acad. of Sci., Novosibirsk, Russia

Volume

1

fYear

1999

fDate

1999

Firstpage

40

Abstract

In the paper the results of an experimental and numerical study of the flow field in a vortex chamber are presented. The experiments showed the non-symmetry of the axial and tangential velocity profiles. The power spectra of the velocity fluctuation demonstrated the increasing of velocity pulsations at frequency close to 20 Hz. This may be caused by the periodical displacement of the vortex axis relative to the position of the chamber axis (vortex precession). Numerical simulation done in the axisymmetrical formulation showed that the standard k-e model of turbulence obtains the maximum of the tangential velocity near the wall of the chamber, while the modified k-e model of turbulence and the experiments obtain the maximum of tangential velocity close to the radius of an exit diaphragm

Keywords

aerodynamics; flow simulation; fluctuations; numerical analysis; turbulence; vortices; 20 Hz; axial velocity profiles; exit diaphragm; flow field; fluid dynamics; maximum tangential velocity; modified k-e model; power spectra; standard k-e model; tangential velocity profiles; turbulence; velocity fluctuation; vortex chamber aerodynamics; vortex precession; Aerodynamics; Equations; Fluctuations; Fluid flow measurement; Frequency; Linear discriminant analysis; Numerical models; Numerical simulation; Spirals; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Science and Technology, 1999. KORUS '99. Proceedings. The Third Russian-Korean International Symposium on

Conference_Location

Novosibirsk

Print_ISBN

0-7803-5729-9

Type

conf

DOI

10.1109/KORUS.1999.875862

Filename

875862