THE HIGH-FREQUENCY REGION OF THE SPECTRUM OF NOISE FORMATION OF A JET,
Abstract
The spectrum and characteristics of the directivity of noise emitted by a submerged air jet flowing from a tapered nozzle at an excess pressure greater than the critical pressure (which is equal to 0.9 atm) are studied. The results of measuring the spectrum and the characteristics of directivity, which were compared with photographs of a jet in different operating conditions, allow one to consider that in the emission spectrum of a jet there is discrete emission connected with the 'cellular' structure of the jet, high-frequency noise, which can be connected with 'vortical Mach waves', and comparatively low-frequency noise of turbulent origin. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 23, 1967
- Accession Number
- AD0655012
Entities
People
- R. E. Shikhinskaya
- V. A. Kresilnikov
Organizations
- National Air and Space Intelligence Center