Enhanced thermal performance with high-amplitude intermittent impingement cooling

The advances of many future engineering applications rely on effective cooling techniques. Beyond the traditional thermal management solutions, design potential unsteady impingement is still under-explored. As a combined experimental and numerical study, this paper reports new findings high-amplitude intermittent with controlled patterns. Specifical attention was paid flow close time ratio. work involved performance measurement small-scale water tunnel system. Unsteady Reynolds Averaged Navier-Stokes Simulation (URANS) conducted to illustrate physics, evaluate at wider range conditions (average number 2800 < Rem 10,000, pulsating frequency 0.1 Hz f 2 Hz, ratio 0.2 γ 0.8). Both data confirm remarkable improvement overall efficiency by flow. Especially around wall jet region, enhancement can reach as high 50%. generation interaction vortex rings break development boundary layer, enhance near turbulence, especially for region. Saving in coolant consumption technique practice also demonstrated. novel concept presented be applied wide including electronic cooling, deicing, gas turbine blade etc.