Abstract
The differences between experimental and theoretical pulsatile flow in grooved channel are investigated experimentally. Time-varying flow rate of pulsatile flow at different Reynolds number is measured by electromagnetic flowmeter and verified by pulsatile flow visualization. The experimental results show that the experimental oscillatory fraction is different from the theoretical value under different Reynolds number and pulsatile frequency. In addition, the experimental pulsatile frequency shows a phenomenon of "step-down" when the stroke becomes larger. Finally, the experimental waveform of the pulsating flow has a phase shift with the theoretical one, and the phase shift increases as the period increasing. The above conclusions are of some significance to improve the efficiency of heat exchanger in practical engineering.