Hyunchang LEE

DOI Number: N/A

Conference number: HiSST-2024-253

Modern high-performance engines like liquid rockets, gas turbines, and hypersonic scramjets use regenerative cooling. As a result, superheated fuel is likely to be injected into combustion chamber. Here, flash boiling spray is likely to occur for the lower pressure in the chamber, and the mechanism of generation and growth of bubble should be thoroughly understood in the regards of heat transfer. In this study, temperature field in the region where bubbles generate and grow has been measured by using 2-color-ratio laser induced fluorescence method using Eosin Y as the dye. The effect of dye on flash boiling spray has been assessed by comparing discharge coefficient before and after mixing the dye. The crosstalk of laser fluence and dye concentration on intensity ratio of 2c LIF image has been investigated, too. Based on measured consecutive temperature fields in high repetition rate, detailed heat transfer between the jet and the ambient, heat flow into the region of phase change could be investigated. Heat transfer affects bubble dynamics significantly and measured temperature fields in this study will support numerical model validation.

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