Analysis On The Gas-solid Two-phase Flow And The Power Cycle Of The Electrogasdynamic Generation

Electrogasdynamic(EGD)power conversion is a process that converts thermal energy directly into electric energy,has great potential for development.However,it has not been widely used and studied deeply.In this paper,numerical simulation and theoretical analysis method are used to analyze the characteristics of gas-solid two-phase flow and the thermodynamic performance of the electrogasdynamic cycle.Firstly,The Laval nozzle of the electrogasdynamic is designed.The influence of inlet pressure,inlet temperature,particle diameter,particle material and working fluid on gas-solid two-phase flow in the nozzle of EGD generation was analyzed by numerical simulation method.Secondly,in the case of heating the wall,the influence of heating power,channel width,heating position,diverging section length,converging section length and inlet height on the gas-solid two-phase flow in the nozzle and the heating effect of different heating modes are analyzed.Finally,the efficiency of the electricity generation cycle is analyzed,and the influence of heating power,inlet temperature,inlet pressure and minimum circulating temperature on the cycle efficiency is analyzed.The results show that increasing the charge density and the charged particle velocity at the collector can improve the electrical current density.Increasing the gas inlet temperature and reducing the density and diameter of the particles can increase the velocity of the gas and particles in the nozzle of electrogasdynamic generator,but the inlet pressure has little effect on the velocity of the gas and the particles.In the case of heating the wall,the higher heating power,the wider inlet size and the longer converging section facilitates the acceleration of the particles.For different locations of heating,the particles accelerate result of the heating the converging section is the most significant.Compared with the wall heating,the inner heat source heating have faster gas and particle velocity on the nozzle outlet.The efficiency of the electricity generation cycle in the case of heating is higher than in the case of adiabatic conditions.