Effect of off-body laser discharge on drag réduction of hemisphere cylinder in supersonic flow

Nadia Kianvashrad, Doyle Knight, Stephen P. Wilkinson, Amanda Chou, Robert A. Horne, Gregory C. Herring, George B. Beeler, Moazzam Jangda

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

6 Scopus citations

Abstract

The interaction of an off-body laser discharge with a hemisphere cylinder in supersonic flow is investigated. The objectives are 1) experimental determination of the drag reduction and energetic efficiency of the laser discharge, and 2) assessment of the capability for accurate simulation of the interaction. The combined computational and experimental study comprises two phases. In the first phase, laser discharge in quiescent air was examined. The temporal behavior of the shock wave formed by the laser discharge was compared between experiment and simulation and good agreement is observed. In the second phase, the interaction of the laser discharge with a hemisphere cylinder was investigated numerically. Details of the pressure drag reduction and the physics of the interaction of the heated region with the bow shock are included. The drag reduction due to this interaction persisted for about five characteristic times where one characteristic time represents the time for the flow to move a distance equal to the hemisphere radius. The energetic efficiency of laser discharge for the case with 50 mJ energy absorbed by the gas is calculated as 3.22.

Original languageEnglish (US)
Title of host publication48th AIAA Plasmadynamics and Lasers Conference, 2017
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104985
DOIs
StatePublished - 2017
Externally publishedYes
Event48th AIAA Plasmadynamics and Lasers Conference, 2017 - Denver, United States
Duration: Jun 5 2017Jun 9 2017

Publication series

Name48th AIAA Plasmadynamics and Lasers Conference, 2017

Other

Other48th AIAA Plasmadynamics and Lasers Conference, 2017
Country/TerritoryUnited States
CityDenver
Period6/5/176/9/17

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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