Numerical Simulation Of The Water Movement In SJN Type Micro-turbine

Energy is the lifeblood of the economy, which is playing a decisive role in thesustainable development of the society. However, energy consumption has continuedto rise, also the nonrenewable resources are exhausted day by day. In order toalleviate this problem, many scholars have carried out the research and developmentof energy-saving methods. There are much wasted water power in the Living andworking days. In fact, the hydrodynamic electricity can be generated by the microturbine power charger, which can be used as some power consumption equipment.So that can achieve the purpose of saving energy.This paper is based on the design principle of turbine and traditional SJN typeturbine flow passage components to make SJN type micro-turbine3D model throughsolidworks. Due to existing conditions, before the numerical simulation of3D model,we should make the2D numerical simulation. The2D SJN type micro-turbine modelis mapped through the gambit. Based on the2D simulation, we can make the3Dmodel numerical simulation easily. In the numerical simulation for2D model byusing fluent, the paper mainly studies the micro-turbine’s performance throughchanging the partial parameters and structure of the turbine. On the basis of study of2D model, in order to make the results more three-dimensional sense, the paperstudies the numerical simulation of the same boundary of a3D model, analysis andcalculation of the hydraulic turbine efficiency. Through a lot of work, analyzing thesimulation results we can draw the following conclusions:Firstly, by changing the total pressure in the entrance of the SJN typemicro-turbine, we can obtain the efficiency changing of the turbine with the entrancepressure, and this also can descript the turbine is suitable to work under the pressureof40000Pa-120000Pa.Secondly, through changing the number of the SJN type micro-turbine blades,we can obtain the efficiency changing of the turbine with the number of the turbine’sblades. The turbine efficiency achieves the optimal when the number of blades is18. Thirdly, by changing the blade type of the SJN type micro-turbine, we canobtain the change trend of the turbine efficiency with the blade type. In the design,we can explore the blade type to increase the turbine efficiency.Fourthly, through changing the speed of the SJN type micro-turbine, we canobtain the speed characteristics of the turbine and the best speed.Fifthly, the efficiency of the SJN type micro-turbine is lower than the practicalSJN turbine. This is mainly because of the limitations of the geometric model,numerical simulation of the structure and some other factors.