Determining the applicability range for an analytical method of computing gas ejector with different techniquesin closing the system of equations
Authors: Baldin A.A., Zakharov V.S.
Published in issue: #8(164)/2025
Category: Aviation and Rocket-Space Engineering | Chapter: Aerodynamics and Heat Transfer Processes in Aircrafts
The paper presents results of analyzing and comparing two methods in closing the system of equations for computation of a gas ejector. The first method is based on setting flow rates of the ejected and ejecting gases, the second — on an assumption of equality of the ejected and ejecting gases static pressures in the mixing chamber inlet section. The cross-sectional area of the ejected gas inlet to the mixing chamber is selected as the variable parameter. Analytical computation results are compared with a numerical solution making it possible to determine applicability range of a particular closing technique. The comparison criteria include the ejection coefficient as one of the main parameters characterizing the ejector operation, and the total pressure of the resulting gas mixture. Numerical simulation is performed in the ANSYS Fluent in the axisymmetric formulation. Turbulence model is k–ω SST.
EDN PCLFEA
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