Detection And Analysis Of The Fluid State Of Steam Ejector

The ejector has the advantages of simple structure,reliable operation and low maintenance cost.It is widely used in the field of aviation,the propulsion system of the jet aircraft,the cooling of the vacuum field,the cooling of the nuclear facilities,and the chemical industry.However,the fluid of ejector flows with with a process of complex change,including multiphase fluid phase,a mixture of supersonic jet,pressure jump,shock wave formation,distribution of shear stress in the boundary layer and the interaction of heat and mass transfer in fluid flow.Fluid flow in the process of actual or state such phenomena can’t describe with mature theoretical model gives the full description of these.In addition,the measurement of fluid in ejector are the pressure and temperature parameters in various import and export,or the local arrangement of measuring points.The amount of data is limited and the fluid of ejector would be in trouble with leakage.Therefore,this paper mainly uses the method of combining numerical simulation with experiment,the steam ejector as the research object,the pressure tube arrangement of the axial direction,through pressure holes on the tube,pressure and temperature to obtain continuous axial direction,to start the analysis of ejector fluid state.The comparative analysis of the experimental data and numerical simulation results show that the axial pressure measurement theory,the change trend of temperature curve,and the simulation results can be well fitted,providing a certain reference value for the detection and analysis of the closed container fluid state.This paper research contents will be proceeded as follows:(1)According to the structure theory of the ejector,the structure size of the steam ejector is calculated,and the data is used as reference.(2)Taking the FLUENT as the tool of fluid dynamics simulation software,the calculation design of steam ejector is simplified,the mesh is divided,the calculation model is selected,and the numerical simulation is carried out.(3)The experimental bench of steam ejector is set up,the pressure and temperature in the axial line of the injector can be continuously obtained through a simple and feasible method.Compared the experimental results with the numerical simulation.