Laser energy deposition in intersecting shocks

H. Yan, R. Adelgreny, G. Elliottz, D. Knightx, T. Beutner, M. Ivanov

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

Abstract

A combined computational and experimental study investigates the effects of a single laser energy pulse on the shockwave and owffeld structure associated with symmetric intersecting oblique shock waves. The freestream Mach number is 3.45 and the shock waves are generated by two symmetric 22°wedges. These conditions correspond to a point midway within the Dual Solution Domain wherein either a Mach Reection (MR) or Regular Reection (RR) is possible. A MR was obtained ffrst numerically and experimentally. The simulation showed the variation of the Mach stem height along the wedge span due to side effects. A RR was observed away from the central plane. The predicted spanwise averaged Mach stem height is 1.96 within 2% of the experimental value of 2 mm. A single laser pulse was added once the Mach Reection was formed. The numerical simulation successfully predicted the reverse transition from a stable MR to a stable RR at the centerplane of the wedges. A stable MR remains in the middle of the span. The averaged Mach stem height at this portion is 0.508mm and is 26% of its original height. The experiment showed that the Mach stem decreased to 20% of its original height and then returned to its original height. That the Mach stem returned to its original height was most likely due to freestream turbulence in the wind tunnel. The study shows the capability of a laser energy pulse to control the reverse transition of MR -RR within the Dual Solution Domain.

Original languageEnglish (US)
Title of host publication1st Flow Control Conference
StatePublished - Dec 1 2002
Externally publishedYes
Event1st Flow Control Conference 2002 - St. Louis, MO, United States
Duration: Jun 24 2002Jun 26 2002

Publication series

Name1st Flow Control Conference

Other

Other1st Flow Control Conference 2002
CountryUnited States
CitySt. Louis, MO
Period6/24/026/26/02

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering

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