| The traditional injection supercharger has a fixed mechanical structure,and there are many problems in the application of industrial production.The application range is small,and the ability to resist the change of the working medium is poor,which greatly restricts the application range of the injection supercharger in the industrial field.The self-adjusting ejector,which can be adjusted according to the fluctuation of the working medium,can resist the influence of the fluctuation of the working condition on the performance of the equipment.In this paper,a membrane ejector was designed,its adjustment ability was verified,and its performance was studied.The key structure size of the main flow nozzle is adjusted by hydraulically controlling the deformation of the main flow nozzle of the membrane,and the throat area corresponds to the pressure on the membrane in a one-to-one manner,which can realize a wide range of operating conditions adjustment,and the cross-section of the main flow nozzle can form a wave structure when it was deformed.By hydraulically adjusting the area and shape of the throat of the mainstream nozzle,and using the screw thread to control the axial position of the mainstream nozzle,a wide range of key structural parameters of the equipment can be adjusted which can find the optimal performance of the equipment.In this paper,the experiment and CFD numerical simulation of membrane ejector are carried out.(1)This paper puts forward the realization scheme of intelligent software ejector.Artificial intelligence finds the best performance of the ejector independently through deep learning.The membrane is deformed by artificial intelligence control hydraulic pressure to adjust the key structure size of main flow nozzle,and the performance of injection supercharger is optimized adaptively by means of feedback control circuit in conjunction with axial position adjustment.In conjunction with the axial position adjustment,the feedback control loop is used.Realize the adaptive optimization of the performance of the injection supercharger.We proposed and designed membrane ejector,the membrane ejector equipment includes parts of the ejector,membrane mainstream nozzle,the membrane mainstream nozzle is easy to process,then we built the experimental platform of the membrane ejector.Which can meet the experimental requirements of air conditions.(2)Using the thread structure of the axial adjustment base material to adjust the axial distance of the mainstream nozzle,the performance of the membrane ejector was studied by experiments and CFD numerical analysis.Performing linear regression on the ejection rate and boost ratio of the experiment,and the regression curve determination coefficients of the regression curve are all above 0.9,which shows good fitting effect.Experiments and CFD results show that within the scope of this study,there is an optimal axial distance of 2.5 from the outlet of the mainstream nozzle of the membrane to the inlet of the mixing chamber.Choosing the appropriate nozzle axial distance can improve the ability of the equipment to resist the fluctuation of operating conditions.(3)The throat area and shape of the mainstream nozzle are adjusted by means of hydraulic membranes.It is found that the membrane is affected by the hydraulic deformation to make the mainstream fluid flow.When the hydraulic pressure of the membrane mainstream nozzle increases,the critical area of the mainstream membrane nozzle decreases,and the mainstream fluid flow also decreases.When the hydraulic pressure reaches a certain value,the flow rate becomes zero.CFD numerical analysis shows that with the increase of area ratio,the ejector performance in critical region is improved.By adjusting the pressure of the membrane main nozzle,the performance of the membrane ejector can be adjusted to resist the impact of operating conditions on the equipment. |
PDF Full Text Request