Numerical Analysis of Fuel Film Spray and Atomization

• Main Authors: Wang ,Jing-yau, 王鏡堯
• Other Authors: Stephen Gen-Ken Chuech
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/63469982122860950204

碩士 === 國立海洋大學 === 船舶機械工程學系 === 83 === In the present study, the film dynamics model is utilized to simulate the motion of annular liquid films which include swirling hollow-cone shape and non-swirling bell-like shape. The surface wave instability theory is used to analyze the variation of wave growth rates due to film velocity, viscosity, and ambient pressure. The film dynamics model and instability theory are combined to predict the film flow structure and the primary atomization characteristics such as film penetration (e.g. film breakupup length) and film trajectory range (e.g. spray angle). In order to develop the droplet breakup model for further coupling with gas flow model in the combustor chamber, the gas flow fields, including structure of gas flow, pressure and velocity profiles, are also analyzed. The computational results in the present study are validated against the available past experimental data and the comparison demonstrates a good agreement with the data. This shows that the models used in the present study can provide a good basis for predicting fuel atomization characteristics in the gas turbine combustor. At last, recommendations for future study are also proposed.