Universal characteristics of liquid-gas ejectors

Abstract

Liquid-gas ejectors (LGE) - a promising means of compression of oil gases and vapours of oil or oil products. The greatest efficiency have LGE developed by a research team under the leadership of K.G. Donca. Their dignity is also standardization of sizes, which allowed to obtain experimental dependences for calculation of the coefficient of induction and recovery factor of pressure. When their use is possible to characterize LGE in the form of dependence of pressure of the mixture from the consumption of pumping gas. But the flow of gas must necessarily coincide with gas flow of the optimal mode of operation LGE. Therefore characteristic LGE need to be build under each working gas consumption. The author proposed to represent characteristics LGE universal dimensionless coordinates fair at all costs pumping gas. As a dimensionless coordinates using coefficient of ejection contained working fluid pressure, compression ratio, efficiency, operating range coefficient of induction. The combination of universal characteristics on the same field allows you to reasonably choose the aerodynamic scheme LGE depending on the nature of the solved problems: to achieve maximum compression, the minimization of pressure at the inlet LGE, the maximum work area for the consumption of pumping gas etc. Pump-jet installations (abnormal operational conditions), used for compressing associated petroleum gas or vapor recovery systems of oil and oil products, formally can be used LGE with aerodynamic schemes of all four types. However, they have different technical and economic parameters, which must be considered when selecting the type of liquid-gas ejector. As for the problem of compression of gas mixtures are of greatest interest such parameters LGE as compression ratio, the pressure made by the pump, energy consumption and operating range for the flow rate of the pumped air-steam mixture.