On application of thermodynamics of irreversible processes for calculation of operating modes of supersonic ejector

The experimental and theoretical research performed recently on supersonic gas ejectors with conical mixing chamber has shown the possibility of realization of two critical operating modes. They differ both in the flow structure in the mixing chamber and the ejector efficiency when operating in these modes. For general industrial implementation of the ejector with a more efficient operating mode, it is necessary to develop methods of its calculation that will consider a variety of modes. A method of calculation of a supersoniс gas ejector with ideal conical mixing chamber is proposed. The method is based on the thermodynamics of irreversible processes and considers all possible ejector operating modes. Satisfactory agreement between the calculation results and experimental data is obtained. The axiom of tendency of processes in nature to perfection is formulated, which does not contradict Prigogine theorem. It explains, on the basis of thermodynamics of irreversible processes, the possibility of realization of two critical operating modes of the ejector at the same ejection coefficient. Applicability of this axiom for determination of gas-liquid ejector operating modes is shown.

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