Numerical investigation on characteristic lengths for gaseous detonation with dilute water spray

Hiroaki Watanabe, Akiko Matsuo, Ashwin Chinnayya, Ken Matsuoka, Akira Kawasaki, Jiro Kasahara

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

Abstract

Two-dimensional (2D) numerical simulations based on Eulerian-Lagrangian method are conducted to clarify the droplet behavior within its lifetime within the detonation cell. The simulation results are analyzed via 2D instantaneous flow fields and Favre spatiotemporal average technique, by applying the recycling block method. Gaseous detonation with dilute water droplets (WDs) propagates stably with a 4% velocity decrease compared to dry CJ velocity in the simulation conditions. From the instantaneous flow field analysis, the droplet breakup occurs primarily in jets, downstream of the transverse wave, nearby the collision of transverse waves, and the interaction between the transverse wave and the jets. The Favre average one-dimensional profiles by grouping WDs based on the initial shock strength that WDs experience reveal the droplet life inside the cellular structure. The mean equilibrium diameter after the breakup is not affected by the initial shock strength.

Original languageEnglish
Title of host publicationAIAA Propulsion and Energy Forum and Exposition, 2019
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105906
DOIs
Publication statusPublished - 2019 Jan 1
EventAIAA Propulsion and Energy Forum and Exposition, 2019 - Indianapolis, United States
Duration: 2019 Aug 192019 Aug 22

Publication series

NameAIAA Propulsion and Energy Forum and Exposition, 2019

Conference

ConferenceAIAA Propulsion and Energy Forum and Exposition, 2019
CountryUnited States
CityIndianapolis
Period19/8/1919/8/22

    Fingerprint

ASJC Scopus subject areas

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

Cite this

Watanabe, H., Matsuo, A., Chinnayya, A., Matsuoka, K., Kawasaki, A., & Kasahara, J. (2019). Numerical investigation on characteristic lengths for gaseous detonation with dilute water spray. In AIAA Propulsion and Energy Forum and Exposition, 2019 (AIAA Propulsion and Energy Forum and Exposition, 2019). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2019-4132