کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1275894 1497575 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessment of existing H2/O2 chemical reaction mechanisms at reheat gas turbine conditions
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Assessment of existing H2/O2 chemical reaction mechanisms at reheat gas turbine conditions
چکیده انگلیسی

This paper provides detailed comparisons of chemical reaction mechanisms of H2 applicable at high preheat temperatures and pressures relevant to gas turbine and particularly Alstom’s reheat gas turbine conditions. It is shown that the available reaction mechanisms exhibit large differences in several important elementary reaction coefficients. The reaction mechanisms are assessed by comparing ignition delay and laminar flame speed results obtained from CHEMKIN with available data, however, the amount of data at these conditions is scarce and a recommended candidate among the mechanisms can presently not be selected. Generally, the results with the GRI-Mech and Leeds mechanisms deviate from the Davis, Li, Ó Conaire, Konnov and San Diego mechanisms, but there are also significant deviations between the latter five mechanisms that altogether are better adapted to hydrogen. The differences in ignition delay times between the dedicated hydrogen mechanisms (Ó Conaire, Li and Konnov) range from approximately a maximum factor of 2 for the H2-air cases, to more than a factor 5 for the H2/O2/AR cases. The application of the computed ignition delay time to reheat burner development is briefly discussed.


► Indirectly contribute to rapid implementation of pre-combustion concepts in GTs.
► Elucidate differences between the existing H2 mechanisms to select the best suitable.
► High-value information for setup of experimental high-P and T full-scale experiments.
► Significant differences in ignition delay time between the mechanisms is shown.
► Data at reheat conditions is scarce.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 18, September 2011, Pages 12025–12034
نویسندگان
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