The prediction of the fluctuations in the properties of free, round-jet, turbulent, diffusion flames

✍ Scribed by F.C. Lockwood; A.S. Naguib

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 791 KB
• Volume: 24
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(75)90133-9

✦ Synopsis

A physical model is presented for the prediction of the turbulent diffusion flame. In this model the turbulence is represented by differential equations for its kinetic energy and dissipation, equilibrium chemical reaction without intermediates is assumed, standard relations for the thermodynamic properties are applied, a differential equation for the concentration fluctuations is solved, and a 'efipped' normal probability distribution function is proposed for the mixture fraction fluctuations. The final component of the model is particular to the present study. All the individual components of the model are, however, tested, as independently as possible, by comparing predictions with the data for three round, free-jet, turbulent flows: inert and isothermal, inert and nonisothermal, and unpremixed reacting. The agreement between the predictions and the data is, on the whole, very good, but new data are urgently required to permit a more extensive evaluation of the physical modelling.