Research Initiation Award: The Effects of Turbulence on the Drag and Evaporation Rate of Liquid Droplets

研究启动奖：湍流对液滴阻力和蒸发速率的影响

• 批准号: 9009358
• 负责人: Richard Gould
• 金额: $ 5.92万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9009358&HistoricalAwards=false
• 关键词: Research; Initiation; Award; Effects; Turbulence

An experimental study to investigate the interaction between droplets and comparable sized turbulent gas vortices is proposed. Measurements of droplet diameters, velocities, and accelerations in a turbulent air stream will be made using strobed shadow photography. The turbulent air flow will be generated in a wind tunnel with turbulence generating grids. Laser Doppler velocimetry will be used to characterize the gas turbulence. Data on the mass and momentum transfer, drop drag coefficients and evaporation rates will be obtained in the range of droplet Reynolds numbers (1 to 500) seen in real sprays. The results will be useful for better understanding droplet transport processes, with application to modeling sprays in combustion chambers.

提出了一种研究液滴与相当大小的湍流气体涡之间相互作用的实验研究。在湍流气流中，液滴直径、速度和加速度的测量将使用频闪影摄影进行。紊流气流将在具有紊流发生网格的风洞中产生。激光多普勒测速法将用于表征气体湍流。有关质量和动量传递、液滴阻力系数和蒸发速率的数据将在实际喷雾中看到的液滴雷诺数（1至500）范围内获得。结果将有助于更好地理解液滴的传输过程，并应用于模拟燃烧室中的喷雾。