Noise and vibration induced by oscillating supersonic flow in a pressure reducing gas valve.

M. Nakano, E. Outa, K. Tajima

Research output: Contribution to journalArticle

Abstract

Generation of intense aerodynamic noise and vibration from a high pressure gas valve might have close relation to the flow patterns particular to the valve trim geometry and the flow condition. Characteristics of acoustic modes inside a model valve and of dynamic force acting to the valve stem are investigated by experiments. Special emphasis is put on to exhibit supersonic flow patterns which are essential to induce the noise and the force. A blow down facility is used, and, at the discharge spot of 10 mm diameter, a plane valve seat and a cylindrical chest are coaxially mounted. A conical plug is supported in the port axis by a stem. Compressed air is discharged through the valve to the atmosphere. The pressure ratio is up to twenty and the isentropic Mach number ranges to 2.5. Four typical patterns of the flow in the supersonic regime are observed by Schlieren photography and the two extreme patterns are simulated by a numerical analysis of the FLIC method. (from authors' abstract)

Original languageEnglish
Journal[No source information available]
Publication statusPublished - 1984 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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