Evaporation of Three-Dimensional Wavy Liquid Film Entrained by Turbulent Gas Flow

Chihiro Inoue, Ikkan Maeda, Go Fujii, Yu Daimon

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

1 Citation (Scopus)

Abstract

For predicting the length of coolant liquid film extending inside a combustion chamber of bipropellant thruster, we develop an original theoretical model, newly incorporating the three-dimensional film dynamics and evaporation. The large velocity difference between the slow liquid film and fast combustion gas initially induces Kelvin-Helmholtz instability as roll wave, followed by transverse Rayleigh-Taylor instability as ripple wave. Superposing the two types of instabilities produce conical cusps as the origin of ligaments on the liquid film, ejecting entraining droplets, which reduce net coolant film flow rate. The conical cusps simultaneously enlarges the heat transfer area of the film subjected to the hot combustion gas. Implementing both effects of the entrainment and wet area expansion into the heat balance between the latent heat of the film and convective heat transfer from the combustion gas, we successfully predict the film coolant length of corresponding combustion test results, presenting that the film length shortens according to the increment of combustion pressure.

Original languageEnglish
Title of host publicationAIAA Propulsion and Energy Forum, 2021
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106118
DOIs
Publication statusPublished - 2021
EventAIAA Propulsion and Energy Forum, 2021 - Virtual, Online
Duration: Aug 9 2021Aug 11 2021

Publication series

NameAIAA Propulsion and Energy Forum, 2021

Conference

ConferenceAIAA Propulsion and Energy Forum, 2021
CityVirtual, Online
Period8/9/218/11/21

All Science Journal Classification (ASJC) codes

  • Energy(all)
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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