Trajectory and Mixing Scaling Laws for Confined and Unconfined Transverse Jets
AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIR
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Transverse jets play an important role in many propulsion-related applications including gas turbine burner dilution, exhaust from VSTOL aircraft, and fluidic thrust vectoring. Although this flow has received extensive research attention over several decades, a lack of universality exists regarding scaling laws available in literature. Using data from existing literature, a foundational scaling law framework has been proposed for the jet trajectory and mixture uniformity. A newly derived parameter demonstrates an improved collapse of trajectory data in literature. This parameter was derived using theoretical arguments that both entrainment and aerodynamic drag should be considered as relevant mechanisms of momentum transport between the jet and cross flow. An experimental study was conducted and the results indicate the utility of the new scaling law parameter for defining flow regimes and correlating mixing performance. Future work will extend this scaling law framework for multiple transverse jet configurations.
- Fluid Mechanics