![]() Guo H, Neill WS (2009) A numerical study on the effect of hydrogen/reformate gas addition on flame temperature and NO formation in strained methane/air diffusion flames. Gröning S, Hardi JS, Suslov D, Oschwald M (2016) Injector-driven combustion instabilities in a hydrogen/oxygen rocket combustor. Ganley JC, Seebauer EG, Masel RI (2004) Development of a microreactor for the production of hydrogen from ammonia. įeiler CE (1967) Effect of combustor parameters on the stability of gaseous hydrogen-liquid oxygen engine. Ĭonsonni S, Vigano F (2005) Decarbonized hydrogen and electricity from natural gas. Curr Appl Phys 10(2):S9-17Ĭhoi O, Lee MC (2016) Investigation into the combustion instability of synthetic natural gases using high-speed flame images and their proper orthogonal decomposition. Springer, Singapore, pp 239–263īrouwer J (2010) On the role of fuel cells and hydrogen in a more sustainable and renewable energy future. In: Dynamics and control of energy systems. īaraiya NA, Chakravarthy SR (2020) Syngas combustion dynamics in a bluff-body turbulent combustor. īaraiya NA, Chakravarthy SR (2019c) The role of mean flame anchoring on the stability characteristics of syngas, synthesis natural gas, and hydrogen fuels in a turbulent non-premixed bluff-body combustor. īaraiya NA, Chakravarthy SR (2019b) Excitation of high-frequency thermoacoustic oscillations by syngas in a non-premixed bluff body combustor. īaraiya NA, Chakravarthy SR (2019a) Effect of syngas composition on high-frequency combustion instability in a non-premixed turbulent combustor. (98)00425-4īaraiya NA, Chakravarthy SR (2018) Effect of the chemical composition of syngas on combustion dynamics inside bluff-body type turbulent syngas combustor. īalasubramanian B, Ortiz AL, Kaytakoglu S, Harrison DP (1999) Hydrogen from methane in a single-step process. Graphic abstractĪnderson WE, Yang V (1995) Liquid rocket engine combustion instability. This study leads to novel observations on the asymmetric nature of shear layers, which can result in hitherto observed dynamical states. A general framework for such oscillations is then applied, leading to identifying specific conditions that need to be satisfied to enable the existence of these oscillations. Further diagnosis employing time-resolved OH* chemiluminescence and particle image velocimetry reveals the amplitude modulation of the quasi-periodic oscillation as a result of staggered vorticity distribution across the bluff body which results in asymmetric heat release rate distribution. The state is seen to be unstable to incremental changes in Re and transitioning to limit cycle oscillations subsequently. An interesting dynamical behavior identified as two-period quasi-periodic oscillations is observed, which has not been reported in prior literature. Continuous wavelet transform of the pressure oscillations reveals that at different Re, the dynamical nature of oscillations is topologically different, although they have identical spectral content. It is observed that the dominant frequency (mode) shifts from the fundamental duct-acoustic mode to the first harmonic, as Re is varied. The thermo-acoustic instability behavior of non-premixed hydrogen combustion is analyzed in the present work with the inlet Reynolds number, Re as the control parameter.
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