Large eddy simulations of fuel-air mixing in a trapped vortex combustoreffect of cavity length to depth ratio

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SHARIFZADEH REZA; AFSHARI ASGHAR

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Journal: FUEL AND COMBUSTION Year:2019 | Volume:11 | Issue:4 Page(s): 43-63

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Title

Large eddy simulations of fuel-air mixing in a trapped vortex combustoreffect of cavity length to depth ratio

Author(s)

SHARIFZADEH REZA | AFSHARI ASGHAR | Issue Writer Certificate

Keywords

Trapped vortex combustorQ1

Fuel-air mixingQ1

Length to depth ratioQ1

Large eddy simulationQ2

Abstract

Turbulent mixing in a Trapped vortex combustor is investigated using Large eddy simulation coupled with filtered mass density function. The impact of cavity length-to-depth ratio ( L/D) as a crucial geometrical parameter on Fuel-air mixing quality is evaluated under non-reacting flow conditions. The vortical structure analysis along with various quantitative measures such as mean cavity and near stoichiometric equivalence ratios, global fuel distribution and mixing efficiency curves are invoked to compare different ratios. The predicted results show that increasing ratio from 0. 60 to 0. 85 improves mixing quality within the cavity due to expanding the main vortex. Further increment of ratio to 0. 93 temporarily impairs the mixing quality, whereas more increasing this ratio to 1. 00 leads to resumption of mixing quality improvement. Nevertheless, provides the best mixing curves and fuel distribution about mean cavity and near stoichiometric equivalence ratios, and consequently the best mixing quality. These findings are commensurate with expectations based on the vortical flow structures inside the cavity.

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APA: Copy

SHARIFZADEH, REZA, & AFSHARI, ASGHAR. (2019). Large eddy simulations of fuel-air mixing in a trapped vortex combustoreffect of cavity length to depth ratio. FUEL AND COMBUSTION, 11(4 ), 43-63. SID. https://sid.ir/paper/138506/en

Vancouver: Copy

SHARIFZADEH REZA, AFSHARI ASGHAR. Large eddy simulations of fuel-air mixing in a trapped vortex combustoreffect of cavity length to depth ratio. FUEL AND COMBUSTION[Internet]. 2019;11(4 ):43-63. Available from: https://sid.ir/paper/138506/en

IEEE: Copy

REZA SHARIFZADEH, and ASGHAR AFSHARI, “Large eddy simulations of fuel-air mixing in a trapped vortex combustoreffect of cavity length to depth ratio,” FUEL AND COMBUSTION, vol. 11, no. 4 , pp. 43–63, 2019, [Online]. Available: https://sid.ir/paper/138506/en

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