Regulation of the Operation of Ejector Systems under Unsteady Gas Pipage

Abstract

During the natural gas trunk transportation, the need for the repair work demanding cutting off the pipeline’s section and gas etching occurs periodically. According to established repair practice on a linear part considerable volumes of natural gas are pitted in the atmosphere. Jet pumps — ejectors can participate in the offered processes of the cut section’s pumping, however because of not stationarity of process it is necessary to save high coefficient of ejection by regulation of the ejector operation. Regulation of the ejector operation by means of the needle with constant pressure of working gas and gas at the exit from the ejector and gas-intaking variable pressure is offered. Operation parameters of the ejector are determined by means of ANSYS Fluent CFD packet. The adjusting diagram of dependence of the ejection coefficient and a consumption of the inhausted gas on pressure of the inhausted gas and the provision of the needle in the snivel is constructed.