Advertisement

Shock Waves pp 973-978 | Cite as

Blast Waves and Explosions Sound generation by explosive decompression of an airplane

  • J. E. Shepherd
  • H. G. Hornung
Conference paper

Abstract

We examine sound generation by the explosive decompression of a pressurized airplane in flight. The near-field is numerically computed by assuming the sudden removal of an axial section of an idealized, streamlined, cylindrical fuselage with an external flow simulating flight. After an initial transient period, we find a nearly circular blast wave with a leading shock strength that is highest in the direction of motion and decreasing rapidly as the observer moves to the rear of the airplane. Geometric acoustics (ray tracing) is used to estimate the attenuation of the wave as it propagates through a model atmosphere to observers on the ground. The audibility of the event is examined in the case of the TWA 800 accident and compared to previous analyses.

Keywords

Shock Tube Blast Wave Sound Generation Sonic Boom Lead Shock Wave 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    ANSI: Estimating air blast characteristics for single point explosions in air with a guide to evaluation of atmospheric propagation and effects. Technical Report ANSI S2.20-1983 (R-1989), Acoust. Soc. Amer. (1983)Google Scholar
  2. 2.
    G. L. McAnich, K. P. Shepherd, and B.M. Sullivan: Audibility of the center tank explosion of twa flight 800. Technical report, NASA Langley Research Center, February 2000. National Transportation Safety Board Docket SA-516, Exhibit 4B, Appendix CGoogle Scholar
  3. 3.
    NTSB: In-flight breakup over the Atlantic Ocean, Trans World Airlines Flight 800. Aircraft Accident Report NTSB/AAR-00/03 DCA96MA070, National Transportation Safety Board (2000)Google Scholar
  4. 4.
    A. D. Pierce: Acoustics. (McGraw-Hill, 1981)Google Scholar
  5. 5.
    J. J. Quirk: Amrita — A Computational Facility (for CFD Modelling). (VKI 29th Lecture Series. 1998. ISSN 0377-8312)Google Scholar
  6. 6.
    J. W. Reed: How loud (pascals) is a “loud” explosion airblast? What happened to TWA 800? J. Low Frequency Noise, 19(1), 47 (2000)CrossRefGoogle Scholar
  7. 7.
    B. Sturtevant and J. E. Cates: Seismic detection of sonic booms. J Acoustic Soc. Am. 111(1), 614 2002ADSCrossRefGoogle Scholar
  8. 8.
    P. A. Thompson: Compressible Fluid Dynamics. (McGraw-Hill, 1972)Google Scholar
  9. 9.
    B. Vanderstraeten, M. Lefebvre, and J. Berghmans: A simple blast wave model for bursting spheres based on numerical simulation. J. Hazardous Materials 46, (1996)Google Scholar
  10. 10.
    N. Wiemeyer: Operational factors factual report. Technical report, National Transportation Safety Board, October 1997. Docket SA-516, Exhibit 2AGoogle Scholar

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • J. E. Shepherd
    • 1
  • H. G. Hornung
    • 1
  1. 1.Graduate Aeronautical LaboratoriesCalifornia Institute of TechnologyPasadenaUSA

Personalised recommendations