A numerical study of spray/wall impingement based on droplet impact phenomenon

• Published in: International journal of heat and mass transfer Vol. 112; pp. 401 - 412
• Main Authors: Ma, Tianyu, Feng, Lei, Wang, Hu, Liu, Haifeng, Yao, Mingfa
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2017; Elsevier BV
• Subjects: Conservation equations; Conservation laws; Corona splash; Diesel fuels; Droplet impact; Impingement; Mathematical models; Morphology; Numerical analysis; Performance prediction; Prompt splash; Splashing; Spray forming; Spray impingement model; Droplet impact; Spray impingement model; Prompt splash; Corona splash
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2017.04.110

•A new spray/wall impingement model is purposed based on droplet impact results.•Morphology dynamics of prompt splash and corona splash are analyzed.•Good performance is obtained in estimation of spray impingement. A new spray/wall impingement model is purposed based on droplet impact experiments and droplet morphology dynamics. Various splashing modes are summarized and analyzed based upon earlier research on droplet impact and conservation laws. Corona splash and prompt splash are distinguished in the new spray/wall impingement model taking the incident and wall conditions into consideration. Morphology dynamics of droplet impingement is analyzed and coupled into the conservation equations, which helps to obtain more accurate dynamic results of splashing droplets. The new wall impact model is validated in a constant volume combustion system under different conditions. Two different fuels, including n-tridecane and diesel, are adopted for spray impingement validations. It is found that this new model shows good performance in predicting impinging spray properties, including radius penetration and splashing height, in wide jet conditions.