Computational study of shock wave control by pulse energy deposition

N. Ohnishi, M. Tate, Y. Ogino

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We have developed a computational code based on the axisymmetric Navier-Stokes equations with thermochemical kinetics for assessing wave drag reduction and other effects in pulse-energy deposition ahead of a bow shock by means of full simulations from generation of a laser-induced blast wave to interaction with the bow shock. Thermochemical nonequilibrium computations can reproduce the process of blast wave formation with laser ray tracing, and the computed low-density core inside the blast wave has a teardrop-like shape, depending on the laser input condition. The flowfield interacting with a bow shock formed in Mach 5 flow was computed. The result suggests that the shape of the low-density core affects the resultant wave drag, and parameters of an incident laser beam should be taken into account in exploring the optimal condition of the proposed wave-drag scheme.

Original languageEnglish
Pages (from-to)521-531
Number of pages11
JournalShock Waves
Volume22
Issue number6
DOIs
Publication statusPublished - 2012 Nov 1

Keywords

  • Pulse energy deposition
  • Shock wave
  • Wave drag reduction

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)

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