Correlation models of critical heat flux and associated temperature for spray evaporative cooling of vibrating surfaces

Prediction models have been constructed to investigate the effect of vibrating surfaces on critical heat flux (CHF) and its associated temperature in spray evaporative cooling. Dimensional analysis has used construct account for influence key dynamic parameters. Experimental measurements obtained from a flat, electrically-heated, copper test-piece, located inside spray-chamber mounted top shaker. A wide range large-amplitude high-frequency which correspond test conditions piece hardware board light-duty automotive vehicle with vibration amplitudes ranging 0 8 mm frequencies 200 Hz. Three nozzle types fed distilled water at flow rates 55 100 ml/min being cool subcooling degrees ΔTsub 10°C 45°C. Measured data both static cases explore CHF surface-to-fluid saturation this occurs, degrees, surface amplitude frequency, vibrational Reynolds Number Acceleration Number. The measured also subsequently calibrate predictive use thermal management systems. Static (without vibration) show that rate, volumetric flux, are largely agreement published literature. For cases, is best explained terms nondimensional parameters: Vibration assessed detail three different subcooling. Predictions excess temperature, using calibrated correlation conditions, very reasonable, suitable intended purpose ensuring safe operation systems