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- W2381767675 abstract "In order to use the correct flashback control methods,flashback type should be distinguished in advance. In the present investigation,the effects of mixing zone structure on flashback limit and flashback type were investigated with CFD simulation over a wide range of mixing length(L) and characteristic hydraulic diameter of mixing zone exit(D). Moreover, numerical experiments were arranged by Design of Experiments(DOE) method and results were dealt with analysis of variance. Based on the simulation results and the analysis,three conclusions can be drawn. Firstly,both L and D have prominent effects on flashback limit. Furthermore,either boundary flashback or combustion induced vortex breakdown(CIVB) flashback could be prevented by decreasing the residence time of mixture inside the mixing zone. Secondly,two critical dimensionless limits(L/D)cri are found to distinguish flashback type. If L/D≤(L/D)cri1,boundary layer flashback occurs. If L/D(L/D)cri2,CIVB flashback occurs,otherwise maybe only CIVB flashback or both CIVB and boundary layer flashback occur. Finally,the critical azimuthal vorticity for CIVB flashback is changed by L/D. With the increase of L/D,critical azimuthal vorticity decreases which makes CIVB flashback more prone to be initiated." @default.
- W2381767675 created "2016-06-24" @default.
- W2381767675 creator A5028965621 @default.
- W2381767675 date "2015-01-01" @default.
- W2381767675 modified "2023-09-23" @default.
- W2381767675 title "Numerical Investigation on Effects of Mixing Zone Structure on Flashback Type for Swirl-Premixed Hydrogen Flame" @default.
- W2381767675 hasPublicationYear "2015" @default.
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