Aubrey MCKELVY, James BRAUN, Guillermo PANIAGUA-PEREZ, Etienne CHOQUET, Thierry ANDRÉ, François FALEMPIN

DOI Number: 10.60853/mzwz-hh93

Conference number: HiSST-2024-00153

The complexity of two-phase interactions in the atomization process has resulted in the use of empirical correlations for the determination of spray features relevant to engine designers. This paper details the development of a correlation for liquid ethanol spray penetration from a plain-orifice injector with experimental validity across both the transonic and supersonic crossflow regimes. Penetration heights and spray transmittance are measured in a 23x17x54 cm linear test section with crossflow Mach numbers ranging from 0.3 to 0.8. Contoured 2D converging-diverging nozzles are inserted into the bottom of the test section to produce supersonic flow with a conically expanding flow path providing
Mach 2 crossflows at the injector. An analytical derivation for a momentum flux ratio correction factor is used to collapse penetration heights across both the subsonic and supersonic regimes. The correlation utilizes a physics-based form to account for both near-field (x/d 0-50) and far-field (x/d 50-200) spray patterns that power-law correlations fail to capture. The performance of the correlation is finally compared to a selection of published correlations that are valid for similar flow conditions.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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