【摘 要】
：
The present study focuses on an airblast spray of ethanol injected into a crossflow of preheated air.Air temperature is varied from 295 to 418 K.Correlation for the spray trajectory is derived for the
【机 构】
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Department of Mechanical Engineering,Indian Institute of Science,Bangalore,India
【出 处】
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13th International Conference on Liquid Atomization and Spra
论文部分内容阅读
The present study focuses on an airblast spray of ethanol injected into a crossflow of preheated air.Air temperature is varied from 295 to 418 K.Correlation for the spray trajectory is derived for the wind-ward spray edge.All previously reported studies have emphasized on the role of momentum ratio on the spray trajectory,whereas the importance of air density on spray atomization has not been addressed,possibly due to lack of experimental data.In this study,for a constant momentum ratio at different crossflow temperatures,the spray trajectory has been measured.From this data,a general correlation is derived which accounts for the density of the crossflow air by adding a correction factor to the correlation.This correlation is found to be in reasonable agreement with experimental results.In the spray in crossflow configuration,used in present study,droplet diameters and velocities are measured downstream of the atomizer at various locations.It is observed that droplet size distribution is shifting towards smaller diameters.This decrease in droplet size is attributed to droplet evaporation.Droplets horizontal velocity is also found to increase as the droplets travel downstream.This behavior is attributed to the drag force exerted by the crossflow air which accelerates the droplets till they attain crossflow air velocity.
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