年間 18 号発行
ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561
Indexed in
EXERGY TRANSFER RESEARCH ON THE SANDIA FLAME D − A TURBULENT PILOTED METHANE − AIR JET FLAME
要約
The Sandia Flame D is a typical and popular turbulent piloted nonpremixed methane-air jet flame. It is extensively studied through both experiments and simulations, however, no exergy analysis of the Sandia Flame D has been reported. This study reports the exergy transfer of the Sandia Flame D for the first time by demonstrating the local kinetic, chemical, thermal, and total exergy of gas in the computational domain. The results obtained from this study show that the local kinetic, chemical, thermal, and total exergy values vary in the ranges of 0.0003–1.974, 1.734–8032.531, 0.003–1568.504, and 1.791–8034.545 kJ/kg, respectively. Both the local kinetic and chemical exergy show the highest values near the gas inlet, and they diffuse and diminish in both the axial and radial directions whereas the local thermal exergy has higher values around the flame marginal and lower values beyond. When the combustion of methane goes on, the chemical exergy transfers to the thermal exergy and it consequently reduces monotonically, whereas the thermal exergy increases first and then diminishes, these collectively making the total exergy reduce monotonically on the whole. The results obtained from this study illustrate well what the local exergy characteristics of the Sandia Flame D are as well as how the exergy transfers and loses.
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