Numerical simulation of energy deposition in a supersonic flow past a hemisphere

Mahsa Mortazavi, Doyle Knight, Olga Azarovaz, Jingchang Shi, Hong Yan

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

6 Scopus citations

Abstract

The interaction of a laser-generated plasma with a hemisphere cylinder at Mach 3.45 is simulated using the Euler equations and assuming a perfect gas. The instantaneous laser discharge is assumed to create a spherical region of heated gas upstream of the blunt body shock. The energy deposition generates a blast wave which propagates radially outwards. The heated region convects with the ow and interacts with the blunt body shock. The interaction results in a momentary decrease in the drag coeffcient. The results are compared with experimental data of Adelgren et al for surface pressure. The peak pressure on the hemisphere due to the impact of the blast wave is matched in the simulation to estimate the thermal effciency (i.e., the fraction of the laser discharge energy resulting in heating of the gas). The predicted centerline pressure vs time on the hemisphere is compared with the experimental data. The comparison indicates that the perfect gas Euler simulations with the assumed initial condition are incapable of accurately predicting the surface pressure and hence the net drag reduction.

Original languageEnglish (US)
Title of host publication52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102561
StatePublished - 2014
Event52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014 - National Harbor, MD, United States
Duration: Jan 13 2014Jan 17 2014

Publication series

Name52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014

Other

Other52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014
Country/TerritoryUnited States
CityNational Harbor, MD
Period1/13/141/17/14

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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