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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Computational Thermal Sciences: An International Journal
ESCI SJR: 0.244 SNIP: 0.434 CiteScore™: 0.7

ISSN Печать: 1940-2503
ISSN Онлайн: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2018021300
Forthcoming Article

Entropy generation in non-coaxial jet combustors

Deodat Makhanlall
Anton de Kom University of Suriname
Prescilla Eudoxie
Anton de Kom University of Suriname

Краткое описание

The effect of fuel vectoring (a variable fuel jet angle) on entropy generation is evaluated in this work. A broad range of fuel jet angles (0-80 degrees) are considered. The performance of the standard jet flame, with coaxial fuel-air jets, is found to improve upon adjusting the direction of fuel injection. The optimum fuel jet angle is mapped as function of fuel-air equivalence ratio (FAER). The study is limited to fuel lean conditions in the range 0.2 < FAER < 1. The study is extended by considering the effects of both fuel and combustion air pre-heating. An optimum air pre-heat temperature is identified. While no such temperature is found for fuel, it is shown that the use of high temperature fuel is an effective approach for managing entropy generation in non-coaxial diffusion flames. Entropy generation due to heat conduction and convection, mass transfer, viscous dissipation, the chemical reactions, and thermal radiation is taken into account. The study is carried out using a CFD (Computational Fluid Dynamics) code. The model is validated against results obtained from several experimental studies.