Numerical Analysis of Premixed Combustion in Heating Plate by T-Type Ejector

A T-type ejector was developed to replace conventional spray nozzle in engineering. The gas of c₃h₈ and air gets a complete mixing in the T-type ejector. The mole fraction of c₃h₈ changes from 3.14% to 3.3% as the inlet pressures of c₃h₈ gas change from 20000 to 120000 Pa and it revealed that the mole fraction of c₃h₈ is not sensitive to inlet pressure. To evaluate the heat transfer performance, the premixed combustion of propane and air was studied by both of numerical calculation and experiment. The combustion is stable in the case of this article and the surface heat transfer coefficient of the paving plate is decreased gradually from time 100 s to 800 s. The temperature of paving plate shows gradual downward trend in 460-385 k after combustion heating 300 s. As a result, the numerical analysis model in this article can be used to predict the temperature of the paving plate of asphalt paver when using T-type ejector. This paper is supported by Hunan Provincial Natural Science Foundation of China (14JJ3149).