Atomization performance of Y-jet nozzle based on VOF-DPM coupling method
The effects of liquid viscosity on the flow and atomization performance of Y-jet nozzles were studied by using the VOF-DPM coupling method.Firstly,the internal and external environmental areas of the Y-jet nozzle were divided into polyhedral grids,and the accuracy of gas-liquid interface recognition was effectively improved using adaptive grid refinement technology based on gas-liquid integral values.The correlation between the flow inside the nozzle and the atomization outside the nozzle was analyzed,and the effects of liquid viscosity on atomization performance were studied.The results show that the viscosity of heavy oil is high,the flow rate is small,and the heavy oil in the nozzle is not easily dispersed and mixed by gas,making it difficult to atomize the liquid.The density of diesel oil is lower than that of heavy oil,which is easy to be accelerated,leading to the penetration distance of spray is greater than that of heavy oil,which makes atomization easier.The spray cone angle of diesel oil is close to that of heavy oil.The ds of heavy oil is 137.14,slightly higher than the ds of diesel by about 0.8%.The result has important application value for evaluating the combustion performance of burners and their adaptability to various fuel modification designs.
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