Planar Laser-Induced Fluorescence and Chemiluminescence Analyses of CO 2 -Argon-Steam Oxyfuel (CARSOXY) Combustion

Odi Fawwaz Alrebei, Abdulkarem I. Amhamed, Syed Mashruk, Phil Bowen and Agustin Valera Medina
Additional contact information
Odi Fawwaz Alrebei: Mechanical and Aerospace Engineering Department, Cardiff School of Engineering, Queen’s Buildings, 14-17 The Parade, Cardiff CF24 3AA, UK
Abdulkarem I. Amhamed: Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Doha 5825, Qatar
Syed Mashruk: Mechanical and Aerospace Engineering Department, Cardiff School of Engineering, Queen’s Buildings, 14-17 The Parade, Cardiff CF24 3AA, UK
Phil Bowen: Mechanical and Aerospace Engineering Department, Cardiff School of Engineering, Queen’s Buildings, 14-17 The Parade, Cardiff CF24 3AA, UK
Agustin Valera Medina: Mechanical and Aerospace Engineering Department, Cardiff School of Engineering, Queen’s Buildings, 14-17 The Parade, Cardiff CF24 3AA, UK

Energies, 2021, vol. 15, issue 1, 1-23

Abstract: Strict regulations and acts have been imposed to limit NO x and carbon emissions. The power generation industry has resorted to innovative techniques to overcome such a low level of tolerance. Amongst those in the literature, CO 2 -argon-steam oxyfuel (CARSOXY) gas turbines have theoretically been proven to offer an economically sustainable solution while retaining high efficiency. Although theoretical studies have characterized CARSOXY, no experimental evidence has been provided in the literature. Therefore, this paper attempts to experimentally assess CARSOXY in comparison to a CH 4 /air flame. OH* chemiluminescence integrated with OH Planar Laser-Induced Fluorescence (PLIF) imaging has been utilized to study flame stability and flame geometry (i.e., the area of highest heat intensity ( A OH ¯ Max center of highest heat intensity ( C OH ¯ Max )) over a range of working fluid Reynolds’ numbers and oxidizing equivalence ratios. In addition, the standard deviation of heat release fluctuations ( σ OH * / OH ¯ ) has been utilized as the base-criteria to compare the stability performance of CARSOXY to CH 4 /air combustion. Moreover, turbulence-chemistry interactions have been described using Damköhler numbers and by plotting Borghi regime diagrams. This paper suggests a modified numerical approach to estimate Damköhler numbers and plot regime diagrams for non-premixed combustion by utilizing the Buckingham π theorem based on experimental observations and results. CARSOXY flames showed lower flame intensity than that of the CH 4 /air flame throughout the entire Re interval by approximately 16%, indicating higher heat release. The Damköhler numbers of the CARSOXY flame were also greater than those of the CH 4 /air flame in all conditions, indicating more uniform CARSOXY flames. It was found that the tendency of the CARSOXY flame of approaching the concentrated reaction zone is greater than that of the CH 4 /air flame.

Keywords: oxyfuel; CARSOXY; PLIF; chemiluminescence; Damköhler number; Borghi regime diagram (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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