Spray Nonuniformities in Gas-Centered Swirl-Coaxial Injectors (Preprint)

摘要

Experimental studies of gas-centered swirl-coaxial (GCSC) injectors have revealed five basic types of nonuniformities in the spray. These nonuniformities can be classified as either affecting the centerline of the spray, with respect to the centerline of the injector, or affecting the temporal mass-distribution. The details of these behaviors are discussed as are possible driving factors and design criteria for avoidance. In general, high momentum flux operations are suggested for minimizing centerline deviations and careful selection of the thickness of the lip initially separating the gas and liquid phases is suggested for minimizing mass-distribution issues.