Fluidic Oscillators in Jet Impingement: A proof of concept

Kurzfassung

This study investigates an improved impingement cooling system for turbo-machinery application by combining it with fluidic oscillators. The upscaled impingement cooling system consists of nine inline impingement jets, each with a diameter of 0.0152 m, a nozzle-to-plate distance (H/D) of 5, and a jet pitch (P/D) of 5, along with a heated plate and a global jet Reynolds number of 10,000. Simulations use the DLR in-house CFD code TRACE, with turbulence modeled by the Menter k-ω SST model and the turbulent scalar fluxes based on the Reynolds analogy for a constant turbulent Prandtl number. The results demonstrate jet oscillations within the oscillators, influencing the impinging jet and modifying the Nusselt number distribution, which in turn affects the overall heat transfer on the target plate. This thesis provides initial outcomes from implementing fluidic oscillators in jet impingement cooling, suggesting further experimental validation​