Efficiency of liquid-jet high-pressure booster compressors

Abstract

Abstract. There are almost no experimental data on the head-capacity curves for liquid-jet compressors with the inlet gas pressure of liquid-jet apparatus more than 1 MPa. Meanwhile, this range is important for many engineering applications in which relatively low compressor ratio is required for the pumping of gas under high pressure. This is mostly the case when gas circulation is to be provided in a closed or almost closed circuit. A head-capacity curve of a liquid-jet apparatus has been estimated experimentally for the air pumping at up to 2.5 MPa by a water jet. To obtain this curve, a new original technique has been submitted and verified which is based on an inverse unsteady problem of gas pumping and allows derivation of the whole curve instead of one operating point, which is the case for conventional methods. The experiments have demonstrated that the relative head of the liquid-jet compressor grows with the apparatus inlet air pressure in the middle part of the curve.

Experimental Study on Performance of Liquid–Gas Jet Pump with Square Nozzle

“…Gas enters through the inlet (8), passes through the inlet pipe (9) and the float flowmeter (10), and is controlled by the inlet valve (11). The gas is mixed with the working fluid in the pressure-stabilizing tank (12), and the mixed liquid is passed through the diffuser pipe (7) before being discharged back into the water tank for recycling. Based on the design diagram of the pump system experimental platform, the experimental setup of the system was constructed, as shown in Figure 2.…”

“…Eisallak [12] conducted experimental analysis of the impact of inlet pressure on jet streams. The results showed that when the inlet pressure is relatively weak, the performance of the liquid-gas jet pump improves, while with higher inlet pressure, the pump's efficiency decreases.…”