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On the forward throw of the caustic associated with transonic acceleration of a supersonic transport

Published online by Cambridge University Press:  04 July 2016

Ronald O. Onyeonwu
Ronald O. Onyeonwu*
Affiliation:
Department of Mechanical Engineering, University of Benin, Nigeria, and Institute for Aerospace Studies, University of Toronto, Canada
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Extract

The use of the theory of geometrical acoustics in the calculation of focussed bangs has received wide attention over the past two decades. None of these calculations however had been formulated for an aircraft manoeuvring in an arbitrary manner in a real atmosphere. Further, in most cases the results have not been presented in such a manner as to be useful to practising engineers. Recent formulation now permits the prediction of the focussing ray precisely and directly without having to compute all the rays reaching the ground from the source.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 80 , Issue 785 , May 1976 , pp. 227 - 228
Copyright
Copyright © Royal Aeronautical Society 1976 

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References

1. Lilley, G. M., Westley, R., Yates, A. H. and Busing, J. R. Journal of the RAeS, Vol 57, No 510, pp 396–414, June 1953.Google Scholar
2. Randall, D. G. Methods for estimating distributions and intensities of sonic bangs. RAE R&M No 3113, August 1959.Google Scholar
3. Warren, C. H. E. The propagation of sonic bangs in a nonhomogeneous still atmosphere. 4th Congress of the ICAS, Paris, 24th-28th August 1964.Google Scholar
4. Lansing, D. L. Application of acoustic theory to prediction of sonic-boom ground patterns from manoeuvering aircraft. NASA TN D-1860, October 1964.Google Scholar
5. Onyeonwu, R. O. Sonic boom signatures and ray focussing in general manoeuvres—I: Analytical foundations and computer formulation. Journal of Sound and Vibration, Vol 42 (I), pp 85–102, 1975.Google Scholar
6. Wanner, Jean-Claude L., Vallee, J., Vivier, C. and Theory, C. Theoretical and experimental studies of the focus of sonic booms. Journal of Acoustical Society of America, Vol 52, No 1, pp 13–32, 1972.Google Scholar