Investigation On The Influence Of Nozzle Arrangement Angle On The Turbine Performance

A turbine is an engine that uses fluid to impinge the impeller and then rotate it to generate power.Most of the turbines in life today refer to turbochargers.The earliest turbochargers were manufactured in the race to increase engine power if engine's displacement was limited.The turbocharger increases the intake air volume of the engine by compressing air.Generally,the exhaust gas from the engine pushes the turbine in the turbine chamber by inertial force.The turbine drives the coaxial impeller.The impeller rotates the fresh air in the air filter pipe into the cylinder.When the engine speed of revolution rev increases,the exhaust gas discharge speed and the turbine speed also increase synchronously,the impeller will compress more fresh air into the cylinder,and the pressure and density of the air will gradually increase,which can make the fuel burn more fully and burn more.The fuel,therefore increasing the amount of fuel and adjusting the engine speed,can increase the engine's output power.In some applications,turbines with partial intake structure can increase the turbine blade height to increase turbine efficiency compared to full-cycle turbines.Therefore,some of the turbines in this field are more than full-cycle.Turbines have certain advantages.Part of the intake air volume of the turbine is subject to the design parameters of the nozzle.From the perspective of theoretical analysis,simulation experiments and numerical analysis,this paper studies the influence of the arrangement angle of supersonic nozzles on the performance of some axially-flowed turbines.A small turbine was used as an experimental model in the experiment.The turbine has a large pressure ratio and thus can provide higher output efficiency.Since the turbine has a low output of pressure gas,it is used under partial intake conditions.The convergent diffusion nozzle of the turbine is capable of generating supersonic fluid.In the experiments studied in this paper,five different nozzles with different nozzle alignment angles were simulated and tested.The results show that the arrangement angle of the nozzle has a great influence on the performance of the turbine.Through research,it is found that the design parameters of the nozzle can usually be adjusted in a wide range.Increasing the nozzle arrangement angle can reduce the pressure on the blade,and changing the nozzle arrangement angle will greatly affect the distribution of turbine energy consumption.The simulation model and numerical analysis proposed in this paper have a very high degree of fit.