Numerical Simulation on Low-Pressure Ejector´s Performance Influenced by Pressure Fluctuation

The low-pressure ejector is an important part of gas combustion equipment. As a result of pressure fluctuation in gas pipeline network, the ejector´s working pressure will change irregularly. Using computational fluid dynamics (CFD) method, gas flows in low-pressure ejector under different pressure are simulated. The result shows when the gas pressure is increased, the total pressure in low-pressure ejector increases, the static pressure decreases, the gas outlet velocity increases and distributes more unevenly, the ejector´s ejecting coefficient and primary air factor increase and the error between the simulation value and theoretical value is less than ±8%.