Wave structure and unsteadiness of stabilized oblique detonation waves around hypersonic projectile

Yu Daimon, Akiko Matsuo, Jiro Kasahara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Unsteady combustion around spherical projectile flying into the combustible gas whose speed is over CJ detonation one is studied numerically. Simulations of 22 computational conditions using simple reaction model which assumes hydrogen-air premixed gas, are carried out with various projectile speed, diameter, and the premixed gas pressure under the axisymmetric and inviscid assumptions. The failed and stabilized oblique detonations are observed in the simulations. The stabilized oblique detonation appears in the cases when the projectile diameter is large and the gas pressure is high. For some of the failed oblique detonations, a collision of triple points is not observed. The propagating speed of the triple point is determined by the magnitude balance between the advection speed behind the incident shock and the speed of transverse wave. It is also found that the transverse wave propagates at CJ detonation speed when the advection flow behind the incident shock perpendicularly crosses the transverse wave. The stabilized oblique detonation has the bothsided propagating transverse wave. The cellular structure is observed using the piles of pressure distributions, and their sizes become irregular in larger diameters.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
Pages14029-14037
Number of pages9
Volume20
Publication statusPublished - 2007
Event45th AIAA Aerospace Sciences Meeting 2007 - Reno, NV, United States
Duration: 2007 Jan 82007 Jan 11

Other

Other45th AIAA Aerospace Sciences Meeting 2007
CountryUnited States
CityReno, NV
Period07/1/807/1/11

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ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Daimon, Y., Matsuo, A., & Kasahara, J. (2007). Wave structure and unsteadiness of stabilized oblique detonation waves around hypersonic projectile. In Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting (Vol. 20, pp. 14029-14037)