Session: 16-01: Poster Presentations

Paper Number: 140354

140354 - Numerical Investigation of H2-Ch4/o2/co2 Premixed Flames Stabilized Over a Dual Annular Counter-Rotating Swirl Burner 

Abstract: 

The rising demand for energy worldwide and the corresponding prices and emissions are major modern challenges. Due to their widespread use as a power source, gas turbines highlight the need for novel technology that can both retain high performance and minimize emissions. Reaching this objective is essential to solving the urgent problems of growing energy use and environmental concerns. In this study, numerical investigations were conducted on premixed oxy-methane and oxy-hydrogen flames using a lean premixed combustor (LPM) designed for gas turbine combustion applications. A pivotal aspect of the study was the deliberate utilization of the dual annular counter-rotating swirl (DACRS) configuration, a burner layout distinguished by its unique features and recognized potential for enhancing combustion efficiency in gas turbine systems. The burner arrangement had comprised two fully premixed streams, the primary centred stream, characterized by a low flow central stream (referred to as the primary stream), included an oxy-hydrogen mixture, while the secondary annular stream featured an oxy-methane mixture (referred to as the secondary stream) and exhibited swirling motion induced by strategically positioned swirlers set at a 45-degree angle. Throughout the research, the oxygen fraction (OF) has been studied in both primary and secondary streams. The OF representing the volumetric percentage of oxygen in the O₂/CO₂ oxidizer. Also, one of the major focuses of the present study had revolved around manipulating the equivalence ratios (φ) of the primary and secondary streams, offering a systematic exploration of how this parameter influenced flame behaviour within the context of the DACRS configuration. To simulate the intricate reaction kinetics of the stratified flames generated within the periodic domain, we had employed the Ansys-Fluent 2022-R1 software, leveraging a partially premixed combustion model. Rigorous validation of temperature profiles resulting from oxygen-methane combustion against experimental data had been undertaken, affirming the accuracy and reliability of our numerical simulations. The outcomes derived from these numerical investigations had provided compelling insights into the DACRS configuration, showcasing highly efficient flame flow interactions. This efficiency had translated into complete combustion and, notably, had yielded a substantial reduction in emissions associated with the DACRS layered flames. For the various operating conditions, temperature, velocity, and OH contours with the emissions pieces have been introduced. The results show that altering the operational conditions produce a stable flame with noticeably low emissions. The results of this study have shown the significant potential of the DACRS burner configuration in optimising combustion efficiency and managing emissions in gas turbine systems. This study added a great deal of knowledge to the ongoing efforts to optimise gas turbine combustion systems for lower environmental impact and higher efficiency.

Presenting Author: Mohamed Hamdy king fahd university of petroleum and Minerals

Presenting Author Biography: Dr. Mohamed Hamdy, a postdoctoral fellow, currently serves as a postdoctoral fellow at the Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management (IRC-HECM) at King Fahd University of Petroleum and Minerals (KFUPM) in Saudi Arabia. With a robust academic background, including a Ph.D. in Mechanical Engineering from KFUPM, Assistant professor at Assiut University- Egypt and postdoctoral fellow at University of Galway - Ireland, he has accrued over twelve years of experience in experimental, modeling, simulation, and optimization of thermo-fluid systems. His expertise spans various domains, including gas turbine combustion, in-well hydrogen production, in-situ combustion, thermal enhanced oil recovery.

Authors:

Mohamed Hamdy king fahd university of petroleum and Minerals
Medhat A. Nemitallah KFUPM