Volume 24, Issue 12 (December 2024)
Modares Mechanical Engineering 2024, 24(12): 727-738 |
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Sohrabi A, Mirsajedi S M. 3D Simulation of the Annular Combustion Chamber of a Micro-Turbine with Hydrogen-Methane Mixture and Partially Premixed Combustion Model. Modares Mechanical Engineering 2024; 24 (12) :727-738
URL: http://mme.modares.ac.ir/article-15-77002-en.html
URL: http://mme.modares.ac.ir/article-15-77002-en.html
1- Shahid Beheshti University
2- Shahid Beheshti University ,m_mirsajedi@sbu.ac.ir
2- Shahid Beheshti University ,
Abstract: (166 Views)
This study investigates the combustion of hydrogen-methane mixtures in the annular combustion chamber of a C30 microturbine. The primary objective is to evaluate the impact of premixed methane-hydrogen combustion on pollutant emissions and outlet temperature in an annular combustion chamber. Simulations were performed using a partially premixed combustion model and the k-ε turbulence model, employing the Probability Density Function (PDF) approach for chemical reaction modeling. To ensure a detailed analysis of pollutant emissions, comparisons were conducted at a constant turbine inlet temperature. The results indicate that adding hydrogen to methane increases NOx emissions due to the higher flame temperature compared to pure methane, even at constant turbine inlet temperatures. However, this blend can reduce fuel consumption by up to 35%. Additionally, a fuel mixture of 60% methane and 40% hydrogen results in a 61% reduction in CO2 emissions. The study further revealed that, owing to the premixed nature of the fuel-air mixture, the annular geometry, and the swirling flow pattern within the combustion chamber, a fuel blend containing 30% hydrogen can lower NOx emissions to 16.1 ppm—significantly less than the 46 ppm reported in previous studies. Moreover, increasing the hydrogen fraction in the fuel reduced CO emissions by 16%. These findings demonstrate that annular combustion chambers with premixed flows and hydrogen-methane fuel blends have considerable potential for reducing pollutant emissions and optimizing fuel consumption
Article Type: Original Research |
Subject:
Combustion
Received: 2024/09/14 | Accepted: 2025/01/21 | Published: 2024/11/30
Received: 2024/09/14 | Accepted: 2025/01/21 | Published: 2024/11/30
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