TED-AJ03-110 Numerical Simulation of Sprays Impinging on Heated Surfaces

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概要

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• The purpose of this study is to numerically simulate the impingement of liquid sprays on surfaces heated in the temperature range of transition to film boiling. The spherical droplets are modeled in the Lagrangian frame of reference, which are dispersed in the continuous gas phase and are traced stochastically. Droplet dynamics at the wall is modeled based on empirical correlation relating the droplet incoming Weber number to the droplet outgoing Weber number. Droplet contact heat transfer is modeled using an effectiveness parameter for the heat transfer coefficient in the wetting and non-wetting boiling regimes. The cooling efficiency of the impacting droplets is analyzed as function of various parameters such as droplet diameter, water flow rate, air-to-water mass flow rate and spray angle. Numerical simulation is presented using three patterns of impacting sprays : 1) Single droplet impacts, 2) multiple droplet impacts (streamlines of droplets), and 3) actual spray jets with mass fluxes comparable to commercial nozzle applications. Favorable comparison with experimental results is demonstrated.

• 一般社団法人日本機械学会の論文

著者

• YAO S.

  Department of Comparative Biomedical Sciences, Louisiana State University, School of Veterinary Medi

• Issa Roy

  Department Of Mechanical Engineering Carnegie Mellon University Pittsburgh

• Yao S.

  Department Of Comparative Biomedical Sciences Louisiana State University School Of Veterinary Medici

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