Abstract
This conceptual numerical study explores a possible strategy for control of unstable intrinsic thermoacoustic (ITA) modes. Control of the ITA feedback loop has not been discussed yet. We propose addition of hydrogen fuel as a means of control and investigate the effect of incremental addition to the fuel mixture on the stability of a laminar slit flame using a variety of approaches: first, the ITA frequencies are estimated by a chemical kinetics solver for hydrogen fuel content up to 50% of the total fuel mass flow. Second, we perform DNS for each case and compute the Flame Transfer Function (FTF), from which the ITA mode frequencies and their stability can be estimated. Additionally, for each case the unstable flame is computed to confirm the estimated ITA mode frequencies. Third, an acoustic network model is employed, which uses the FTFs and predicts the stability limits observed by the DNS. Comparison with DNS data features very good agreement and allows to model the impact of hydrogen on the stability of the combustor.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
