This work investigates the reacting flow field and flame behavior of a swirl-venturi lean direct injection (SV-LDI) concept. To elucidate the effect of the converging-diverging venturi geometry included in this concept, the baseline hardware is compared against an "airblast-type" venturi configuration which includes only a converging section. Both methane and Jet-A reacting flows are investigated. By comparing the velocity field characteristics and flame dynamics results from converging-diverging and converging-only venturi configurations, the impact of the diverging venturi section on a swirl-venturi airblast injector performance is demonstrated.
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