Dong-Geun LEE, Sul-Hee KIM, In-Woong LEE, Dong-Hee LEE, Hee-Jang MOON

DOI Number: XXX-YYY-ZZZ

Conference number: HiSST2024-00349

Hypersonic air-breathing propulsion systems primarily utilize regenerative cooling, employing endothermic fuels to cool the high temperature inflow air. However, the phenomenon of coking in the fuel due to high temperatures within the cooling channels poses a significant challenge. Adding metal particles which form organometallic compound, or gelling fuels which enhance the thermal stability of the fuel, are known to mitigate the coking issue. Therefore, application of metallized gelled fuel may be a reasonable future fuel candidate for preventing coking. However, gel type fuels are characterized by its high viscosity and also by viscosity variations with temperature. This academic study aims to investigate spray characteristics in low-temperature environments using spray visualization experiments with a pressure swirl injector. Spray angles and break-up lengths were measured from the visualization images, revealing that viscosity changes based on temperature dominantly influence the spray characteristics in low-temperature conditions.

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