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Dynamics of hydrogen–ammonia–natural gas lean-premixed high-pressure flames

Journal Article · · Fuel
The influence of fuel composition on self-excited combustion instabilities in a high-pressure combustor operated with ammonia, hydrogen, and natural gas fuels is characterized with high-frequency pressure measurements and imaging of the flame structure. A micromix multi-stage injector with 19 elements is used to introduce the fuel blend premixed with heated air into an optically accessible combustor operated at ~1.1 MPa. As hydrogen is substituted for natural gas, longitudinal thermoacoustic instabilities are observed in the combustor with pressure fluctuation amplitudes as large as 8% of the mean chamber value. In the absence of natural gas, limit-cycle instability magnitude is largely insensitive to ammonia addition. However, fuel compositions with > 20% natural gas result in positive correlation between instability amplitude and ammonia concentration. Spatial distribution of heat release in the combustor evaluated from OH* chemiluminescence imaging reveals axial growth in the regions of heat release fluctuation as hydrogen decreases, thus correlating flame length to instability amplitude. Distinct transitions from the first harmonic of the fundamental longitudinal acoustic mode (~1100 Hz) to the fundamental mode (~550 Hz) are observed with root mean square pressure fluctuations exceeding 7% of the mean chamber value. Here, these cases correspond to hydrogen mole fractions ≤ 50%. Analysis of the phase relationship between pressure fluctuations upstream and downstream of the flame zone indicates acoustic coupling of the injector as a key contributor to instability growth.
Research Organization:
Purdue University, West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy and Carbon Management (FECM)
Grant/Contract Number:
FE0032074
OSTI ID:
2515641
Journal Information:
Fuel, Journal Name: Fuel Vol. 385; ISSN 0016-2361
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (51)

Time-resolved imaging of the cellular structure of methane and natural gas detonations journal May 2022
Singular-spectrum analysis: A toolkit for short, noisy chaotic signals journal September 1992
Testing the null hypothesis of stationarity against the alternative of a unit root journal October 1992
The role of equivalence ratio oscillations in driving combustion instabilities in low NOx gas turbines journal January 1998
On the phase between pressure and heat release fluctuations for propane/hydrogen flames and its role in mode transitions journal December 2013
Effect of hydrogen enrichment on the dynamics of a lean technically premixed elevated pressure flame journal March 2021
Enhancement of ammonia combustion with partial fuel cracking strategy: Laminar flame propagation and kinetic modeling investigation of NH3/H2/N2/air mixtures up to 10 atm journal September 2021
Applying heat flux method to laminar burning velocity measurements of NH3/CH4/air at elevated pressures and kinetic modeling study journal February 2022
Coupled interaction between acoustics and unsteady flame dynamics during the transition to thermoacoustic instability in a multi-element rocket combustor journal June 2022
On the impact of H2-enrichment on flame structure and combustion dynamics of a lean partially-premixed turbulent swirling flame journal July 2022
Influence of radial fuel staging on combustion instabilities and exhaust emissions from lean-premixed multi-element hydrogen/methane/air flames journal August 2022
The influence of hydrogen on the stability of a perfectly premixed combustor journal November 2022
Hybrid rich- and lean-premixed ammonia-hydrogen combustion for mitigation of NOx emissions and thermoacoustic instabilities journal April 2024
Exhaust energy recovery via catalytic ammonia decomposition to hydrogen for low carbon clean vehicles journal February 2021
Characterization of ammonia spray combustion and mixture formation under high-pressure, direct injection conditions journal February 2023
Premixed ammonia/hydrogen swirl combustion under rich fuel conditions for gas turbines operation journal March 2019
Stability limits and NO emissions of premixed swirl ammonia-air flames enriched with hydrogen or methane at elevated pressures journal March 2021
The effect of hydrogen enrichment on the forced response of CH4/H2/Air laminar flames journal July 2021
Combustion features of CH4/NH3/H2 ternary blends journal August 2022
Hydrogen substitution of natural-gas in premixed burners and implications for blow-off and flashback limits journal September 2022
Review on the recent advances on ammonia combustion from the fundamentals to the applications journal March 2022
Boundary layer flashback of non-swirling premixed flames: Mechanisms, fundamental research, and recent advances journal July 2017
Lean-limit combustion instabilities of a lean premixed prevaporized gas turbine combustor journal January 2011
Interaction between velocity fluctuations and equivalence ratio fluctuations during thermoacoustic oscillations in a partially premixed swirl combustor journal January 2017
Science and technology of ammonia combustion journal January 2019
Measurements of self-excited instabilities and nitrogen oxides emissions in a multi-element lean-premixed hydrogen/methane/air flame ensemble journal January 2023
Extinction and NO formation of ammonia-hydrogen and air non-premixed counterflow flames journal January 2023
Spectral proper orthogonal decomposition and its relationship to dynamic mode decomposition and resolvent analysis journal May 2018
Dynamics and control of premixed combustion systems based on flame transfer and describing functions journal May 2020
Review on Ammonia as a Potential Fuel: From Synthesis to Economics journal February 2021
Stability and Structure of Burner Flames journal February 1943
The development of an optically accessible, high-power combustion test rig journal March 2014
Self-excited instability regimes of a confined turbulent jet flame at elevated pressure journal April 2022
Multivariate singular spectrum analysis and the road to phase synchronization journal September 2011
A Mechanism of Combustion Instability in Lean Premixed Gas Turbine Combustors journal April 2000
Influence of the Combustor Aerodynamics on Combustion Instabilities From Equivalence Ratio Fluctuations journal December 2002
FLOX® Combustion at High Power Density and High Flame Temperatures journal August 2010
Development and Testing of a Low NOx Hydrogen Combustion System for Heavy-Duty Gas Turbines journal January 2013
Performance of Multiple-Injection Dry Low-NOx Combustors on Hydrogen-Rich Syngas Fuel in an IGCC Pilot Plant journal September 2015
Experimental Investigation of Self-Excited Combustion Instabilities in a Lean, Premixed, Gas Turbine Combustor at High Pressure journal June 2018
Assessment of Current Capabilities and Near-Term Availability of Hydrogen-Fired Gas Turbines Considering a Low-Carbon Future journal February 2021
Effect of Hydrogen on Steady-State and Transient Combustion Instability Characteristics journal March 2021
Flame Transfer Functions for Turbulent, Premixed, Ammonia-Hydrogen-Nitrogen-Air Flames journal December 2022
The Effect of Hydrogen on Nonlinear Flame Saturation journal September 2023
Parametric investigation of combustion instabilities in a single-element lean direct injection combustor journal July 2018
Injector-coupled transverse instabilities in a multi-element premixed combustor journal January 2020
Likelihood Ratio Statistics for Autoregressive Time Series with a Unit Root journal July 1981
Injector-Driven Combustion Instabilities in a Hydrogen/Oxygen Rocket Combustor journal May 2016
Design and Development of the High Pressure Combustion Laboratory at Purdue University conference July 2017
Transducer Installation Effects on Pressure Measurements in PGC Devices conference January 2018
Thermoacoustic Instability Considerations for High Hydrogen Combustion in Lean Premixed Gas Turbine Combustors: A Review journal January 2021

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