Blar i Institutt for energi og prosessteknikk på tidsskrift "Combustion and Flame"
Viser treff 21-28 av 28
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Intrinsic instabilities of hydrogen and hydrogen/ammonia premixed flames: Influence of equivalence ratio, fuel composition and pressure
(Peer reviewed; Journal article, 2023)Premixed lean hydrogen-air flames exhibit instabilities due to hydrodynamic instabilities but also thermo-diffusive instabilities. However, in the case of ammonia/hydrogen blends, the effect of ammonia addition on instabilities ... -
Intrinsic thermoacoustic modes in an annular combustion chamber
(Peer reviewed; Journal article, 2020)Thermoacoustic instabilities originate from the interaction of unsteady heat release rate associated with flames and the acoustic modes of a combustor. A feedback loop not involving the natural acoustic modes has been ... -
A numerical study on the combustion of a resolved carbon particle
(Journal article; Peer reviewed, 2021)Combustion of a single, resolved carbon particle is studied using a novel numerical approach that makes use of an overset grid. The model is implemented into the framework of a compressible Direct Numerical Simulation (DNS) ... -
On the structure of the near field of oxy-fuel jet flames using Raman/Rayleigh laser diagnostics
(Journal article; Peer reviewed, 2012)An experimental study on turbulent non-premixed jet flames is presented with focus on CO2-diluted oxy-fuel combustion using a coflow burner. Measurements of local temperatures and concentrations of the main species CO2, ... -
Rapid change of particle velocity due to volatile gas release during biomass devolatilization
(Peer reviewed; Journal article, 2021)Our earlier study showed significant differences in average particle velocity between simulation and experimental results for devolatilizing biomass particles in an idealised entrained flow reactor [N. Guo et al., Fuel, ... -
Scaling and prediction of transfer functions in lean premixed H2/CH4-flames
(Journal article, 2020)Features of the flame transfer function (FTF) are characterized for turbulent, non-swirled, bluff body stabilized “M” flames for different hydrogen and methane blends including pure hydrogen flames. An increase in the ... -
Tailoring the gain and phase of the flame transfer function through targeted convective-acoustic interference
(Peer reviewed; Journal article, 2022)This paper investigates how targeted interference between two well characterized sources of hydrodynamic disturbances can modify the response of premixed bluff body stabilised flames with and without swirl. We introduce ... -
Thermoacoustic modes of intrinsic and acoustic origin and their interplay with exceptional points
(Peer reviewed; Journal article, 2020)We propose a general classification of all the modes of a given thermoacoustic system into two sets: one of acoustic origin and one of intrinsic thermoacoustic (ITA) origin. To do this, the definition of intrinsic modes, ...