Research On Structure And Performance Of Divider

The natural gas is the important high quality and clean energy sources,so reasonably exploiting and using the natural gas are of great significance to industrial production and people's lives.As the natural gas has the high pressure in the stratum and contains the huge pressure energy,in the process of natural gas exploitation and transportation,how to use the pressure energy of natural gas in the stratum is a very important subject which has research and application value.The divider belongs to advanced and highly effective energy saving pressure exchanging equipment,and it mainly utilizes the work of the shock wave and expanding wave to realize pressure exchanging.A divider is a machine in which an entering gas stream is split into two outgoing flows,one having a higher and the other a lower stagnation pressure than the ingoing flow.The equipment can recycle the pressure energy of natural gas effectively in the process of natural gas exploitation and transportation,and it has the advantages of compact structure,easy assembly and maintenance,operation with liquid and so on,so it has broad application prospect in natural gas treatment.At present,there are few researches on three-port pressure exchanging equipment in domestic and overseas.In order to obtain the performance of divider changes with the parameters,the subject gives a further study in theoretical analysis,numerical calculation and experimental study.(1) Theoretical analysis.Analyze the working principle of the divider by using aerodynamics theory,and introduce the divider's structure and the work process,analyze the unsteady flow of gas of the divider's nozzle by using steady fluid flow theory,and analyze the motion law of hock wave,the expansion wave and the contact face in wave rotor channel by using unsteady fluid flow theory,and plot the wave pattern of divider.(2) Numerical simulation.After establish numerical calculus model of the divider,carry on the preliminary calculation of the divider's nozzles width through the two-dimensional single channel numerical calculus model.A two-dimensional and multi period whole-machine model is set up to simulate the divider's internal flow field by using fluid calculation software FLUENT.The divider's isentropic efficiency with different medium-pressure nozzle width, high-pressure nozzle width,low-pressure nozzle width,deflection distance and wall distance is analyzed by numerical calculus method,and sum up the law of divider's isentropic efficiency with different gap,speed,pressure ratio and medium-pressure,in order to reduce the losses of flow,the tilt-type nozzle structure and the wedge-shaped channel wall structure are put forward to improve the performance of divider.(3) Experimental research.After establish experimental system,according to experimental process,determinate the parameter of experimental analysis,and study the medium-pressure nozzle width,deflection distance,matching high-pressure and low-pressure nozzle,speed,operating pressure and the gap on the impact of the divider's performance. Summarize the various parameters on the impact of the law of the divider's performance,at the same time,analyze and diagnose the performance of equipment,summed up the influencing factors of equipment performance.Through the above research,we can see that the main influence parameters of divider's performance include:nozzle width,operating pressure,wall distance,deflection distance, speed and gap,furthermore,there are the best matching relationships among these parameters. In this paper,sum up the performance of divider that varies with changes of the parameters,so it has a certain reference value for the further study in the future.