A liquid pool simulation on droplet combustion in a swirl flow

Shuhn Shyurng Hou, Ta-Hui Lin

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

Abstract

The influence of flow vorticity on droplet combustion and evaporation are experimentally simulated by using a burning liquid-pool system, and numerically investigated by considering a nonreactive, rotating, stagnation-point flow, respectively. The experiment involves measurements of flame temperature, flame position and evaporation rate of the liquid pool, observations of the recirculation zone and the soot layer, and identification of flame extinction. A finite-volume method is employed to numerically solve the corresponding transport equations. Calculated results show that in the vicinity of the liquid surface, both convection and diffusion transports are weakened by the flow vorticity resulting in the suppression of the evaporation strength of liquid; the recirculation zone can be identified and compared with experimental observation. For the steady burning of an ethanol pool in a swirl air jet, it is found that as the angular velocity increases, the diffusion flame shifts closer to the upper burner, has a larger flame thickness, experiences a smaller flame stretch but suffers from the reduction of mass diffusion of ethanol vapor to the flame. However, the evaporation rate of ethanol is usually decreased with increasing the angular velocity. In the flame extinction experiment, the critical volumetric oxygen concentration at extinction first decreases to a minimum value and then increases with angular velocity. It is generally concluded that the flow vorticity has a negative effect on both droplet combustion and evaporation.

Original languageEnglish
Title of host publicationCoal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791878958
DOIs
Publication statusPublished - 1992 Jan 1
EventASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992 - Cologne, Germany
Duration: 1992 Jun 11992 Jun 4

Publication series

NameASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992
Volume3

Other

OtherASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992
CountryGermany
CityCologne
Period92-06-0192-06-04

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Mechanical Engineering

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  • Cite this

    Hou, S. S., & Lin, T-H. (1992). A liquid pool simulation on droplet combustion in a swirl flow. In Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations (ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992; Vol. 3). American Society of Mechanical Engineers. https://doi.org/10.1115/92-GT-117