Nonuniform resonator based valve-less standing wave suction pump for gases

Performance of a nonuniform resonator based valve-less standing wave suction pump for gases is evaluated. Nonuniform resonator with a linear area variation was used to achieve high amplitude standing wave. High oscillating pressure at the small end of the resonator was rectified by fluidic diodes. Experiments were done with pairs of rectifiers, each of which consisted multiple diode elements in series. The performance of the valve-less standing wave pump is evaluated in terms of suction flow rate and suction pressure achieved. It was found that higher driving amplitudes gave higher flow rates and higher suction pressures. Increasing the number of diode elements also did the same. Smaller diode diameter cases produced higher suction pressures at similar flow rates. The measured maximum suction pressure was 4900 Pa and the maximum flow rate observed was 10.2 slpm of air respectively, while operating around 925 Hz.