Numerical Simulation and Performance Study of Adjustable Steam Ejector Using CFD

Abstract

A djustable ejector flow control can be achieved to export in a stable area, thus reducing the jet inlet parameters on the export parameters as well as the impact of the entire system, widening of the jet's effective operating range. In this paper, the establishment of an effective mathematical models and computational methods to commercial CFD software FLUENT 6.3 as a platform for the adjustable jet to simulate the internal flow process and performance research, exploration and analysis of the main needle is moved (ie the nozzle throat orifice area change) operating parameters (including the working fluid inlet pressure, inlet pressure and the lead body jet mixing fluid outlet pressure) on the adjustable jet performance of the law, for the adjustable jet to provide important parameters to optimize the design. Studies show that: ① the needle device with adjustable spray jet in a non-rated conditions, can increase the coefficient of the jet injector; ② other parameters remain the same circumstances, the adjustable jet to varying degrees, increased work pressure , suction pressure, discharge pressure and outlet flow range.

Structural Design and Simulation Analysis of Ejector Used in Automotive Power Steering Oil Discharge Equipment

“…Calculate the Outlet Pressure of Mixed Fluid.According to Eq. 1 [2] ,where compression ratio is 0.2,the inlet gas flow rate a px is 55m/s, we can get the f ps is 3.27mm 2 . When the area ratio(m) was chosen as 12 and f px is substitued into Eq.…”