The Generation and Radiation of Supersonic Jet Noise. Volume 3. Turbulent Mixing Noise Data
Abstract
The characteristics, both spectral and directivity, of the sound field of supersonic shock-free jets are studied by measuring the turbulent mixing noise in the far field from four two-inch diameter nozzles, namely a convergent nozzle for pressure ratios up to critical and three convergent- divergent nozzles having nominal design Mach numbers of 1.4, 1.7, and 2.0, respectively. The measurements were conducted in a free-field environment. The results from 75 jet exit conditions are presented in a systematic manner in the form of tabulated one-third octave spectra. The test program was carefully planned in order to obtain results (i) at constant jet efflux temperature with varying jet velocity, and conversely (ii) at constant exit velocity while varying jet efflux temperature. The effects of jet velocity and exhaust temperature on turbulent mixing noise can therefore be assessed independently.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 23, 1976
- Accession Number
- ADA032882
Entities
People
- H. K. Tanna
- Peter D. Dean
- Robert H. Burrin