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Acoustic Design and Performance of Turbojet Test Facilities
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English
Abstract
THE high noise level associated with turbojet testing creates two noise problems:
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1.
The reduction of noise in the neighborhood of the installation to an acceptable level.
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2.
The protection of operating personnel from excessive noise.
Desirable sound levels are established and, on the basis of these levels, specifications are written for the acoustic treatment of the turbojet facilities. The acoustic treatment must not only be satisfactory from the point of view of noise reduction, but it must also be able to withstand the very rigorous operating conditions. High-temperature and high-velocity flow of gases through the exhaust stack makes for these rigorous conditions.
Designs which meet these specifications are discussed in this paper, together with performance data obtained on these designs.
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Citation
Fehr, R. and Crocker, B., "Acoustic Design and Performance of Turbojet Test Facilities," SAE Technical Paper 550252, 1955, https://doi.org/10.4271/550252.Also In
References
- Journal of the Acoustical Society of America, Vol. 24 September 1952 480 489 “Acoustic Design of Aircraft Gas Turbine Test Cells,” Fehr, R. O. Wells, R. J. and Bray. T. L.
- Journal of the Acoustical Society of America, Vol. 25 May 1953 423 428 “Noise Control Measures for Jet-Engine Test Installations,” Hardy. H. C.
- Wright Air Development Center Technical Report 52-204 1952 Handbook for Acoustic Noise Control, Vol. I, Physical Acoustics
- Journal of the Acoustical Society of America, Vol. 25 May 1953 405 411 “Review of Influence of Meteorological Conditions on Sound Propagation,” Ingard. U.
- Journal of the Acoustical Society of America, Vol. 23 July 1951 435 439 “Levels and Spectra of Traffic, Industrial, and Residential Area Noise,” Bonvallet. G. L.
- Proceedings of National Noise Abatement Symposium Vol. 2 October 1951 21 38 “Physiological and Psychological Effects of Noise,” Parrack. H. O.
- Journal of the Acoustical Society of America, Vol. 25 May 1953 429 432 “Comparison between Model Study Tests and Field Measurements on Aircraft Test-Cell Silencer,” Callaway D. B. and Lemmerman. R. D.
- Journal of the Acoustical Society of America, Vol. 25 May 1953 433 437 “Sound Radiation Patterns of Gas Turbine Exhaust Stacks,” Wells R. J. and Crocker. B. E.
- ATC Report No. ARTC-2 “Uniform Practices for Measurement of Aircraft Noise.” Aircraft Industries Association Washington, D. C. Aug. 1 1952