Abstract

L injection into a high-speed crossflow has been considered in a number of aerospace systems. Recent developments in engine design and new hybrid fuels with large viscosity and surface tension ranges and the lack of data relating the behavior of the jet to physical properties were the motivating forces behind this study. In a crossflow the jet is deformed and bent downstream by the main flow. Several types of waves appear on the windward edge leading to breakup. Some are capillary disturbances and waves caused by turbulence, and some are aerodynamically induced waves which are primarily responsible for the decomposition of the jet. The viscosity and surface tension of the injectant have a direct effect on the spray plume, both internally and at the surface.

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