73th Annual Meeting of the APS Division of Fluid Dynamics (November 22, 2020 — November 24, 2020)

V0056: Shock wave interaction with a near-critical fuel droplet

Authors
  • Bradley Boyd, J. Mike Walker '66 Mechanical Engineering Department, Texas A&M University, USA
  • Dorrin Jarrahbashi, J. Mike Walker '66 Mechanical Engineering Department, Texas A&M University, USA
DOI: https://doi.org/10.1103/APS.DFD.2020.GFM.V0056

Shock-droplet interactions occur in a spectrum of high-speed propulsion systems e.g. scramjets and rotating detonation engines. When the combustion chamber pressure nears the critical pressure of the fuel/air mixture, transcritical behavior involving the transition from liquid-like to gas-like states is expected. We consider the interaction of a shockwave with a liquid droplet at near-critical conditions. A multiphase diffuse-interface solver coupled with the Peng-Robinson equation of state is developed to accurately determine the state of the fluid as the shock propagates through the droplet. The results show the influence of varying the initial temperature of the droplet and the shockwave strength on the droplet instabilities and breakup behavior.

This work is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License. Any reuse must credit the author(s) and provide a link back to this page.