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Burning Speed and Entropy Production Calculation of a Transient Expanding Spherical Laminar Flame Using a Thermodynamic Model
Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts, MA 02115, USA
Current address: Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089, USA
* Author to whom correspondence should be addressed.
Received: 20 November 2010; in revised form: 7 December 2010 / Accepted: 15 December 2010 / Published: 21 December 2010
Abstract: A thermodynamic model has been developed to calculate burning speed and entropy production of transient expending spherical laminar flame in an enclosed vessel. The model also predicts the particle trajectories of both unburned and burned gases in the vessel. The input to this model is the dynamic pressure rise due to combustion process. The unburned gases are divided into three regions: The core unburned gases which are compressed isentropically, the vessel walls and electrodes boundary layer gases, and gases in the preheat zone of the flames. The burned gases are in many shells having the same pressure but different temperatures. The model also includes radiation losses from the burned gases to vessel walls. Entropy production due to irreversibility has been calculated by applying entropy balance to the gas mixtures. Burning speed of premixed n-decane air mixture has been reported for temperatures and pressures along an isentrope.
Keywords: thermodynamic model; laminar burning speed; premixed flame; entropy production in a flame
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Eisazadeh-Far, K.; Moghaddas, A.; Rahim, F.; Metghalchi, H. Burning Speed and Entropy Production Calculation of a Transient Expanding Spherical Laminar Flame Using a Thermodynamic Model. Entropy 2010, 12, 2485-2496.
Eisazadeh-Far K, Moghaddas A, Rahim F, Metghalchi H. Burning Speed and Entropy Production Calculation of a Transient Expanding Spherical Laminar Flame Using a Thermodynamic Model. Entropy. 2010; 12(12):2485-2496.
Eisazadeh-Far, Kian; Moghaddas, Ali; Rahim, Faranak; Metghalchi, Hameed. 2010. "Burning Speed and Entropy Production Calculation of a Transient Expanding Spherical Laminar Flame Using a Thermodynamic Model." Entropy 12, no. 12: 2485-2496.