6. Physics of a Fluid, Neutral and Ionized Gases

MULTIMODE PULSATIONS IN THE AXISYMMETRIC CAVERN AT SUPERSONIC FLOW

Dmitriy A. Gubanov
1. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
gubanov@itam.nsc.ru
Valeriy I. Zapryagaev
1. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS Novosibirsk, Russian Federation
zapr@itam.nsc.ru
The material was received by the Editorial Board: 02.02.2017
Experimental study results of flow structure and pressure pulsation spectral characteristics of axisymmetric cavern at supersonic flow with Mach number 2 is presented. Multimode pulsation existence is observed. Different modes dominate in different time moments. Maximum of one mode amplitude correspond to minimum value of another. Mode tuning nature is incidental. Time of one mode existence is much more than one of mode oscillation period. It is determine that pulsation mode exist in the form of toroidal and helical disturbances. Numerical calculation results qualitative reproduce multimode fluctuation and corresponded to experimental data.

Keywords:
axisymmetric cavern, supersonic flow, multimode pulsation.
УДК 533.6.011.5

MULTIMODE PULSATIONS IN THE AXISYMMETRIC CAVERN AT SUPERSONIC FLOW
References: Gubanov D. A., Zapryagaev V. I. MULTIMODE PULSATIONS IN THE AXISYMMETRIC CAVERN AT SUPERSONIC FLOW. Siberian Journal of Physics . 2017, vol. 12, no. 2. P. 119–128. (in Russ.). DOI: 10.54362/1818-7919-2017-12-2-119-128