Results 1 to 10 of about 21,289 (291)
Flame transfer function measurements of hydrogen-enriched reheat flames
Combustion and FlameThis study experimentally investigates the dynamic behavior of hydrogen-natural gas reheat flames, which are stabilized by both flame propagation and autoignition. Measurements are conducted on an test rig which allows the acoustic excitation of reheat flames.
Mirko R Bothien, Thomas Sattelmayer
exaly +3 more sources
Linear instability of a premixed slot flame: Flame transfer function and resolvent analysis
Combustion and Flame, 2022 International audience ; The response to forcing of a 2D laminar premixed slot flame is investigated by means of linear analysis, based on the compressible flow equations with a two-step reaction scheme for methane combustion. The flame transfer function (FTF) is computed from this linear model, in excellent agreement with reference nonlinear ...
Chuhan Wang +2 more
exaly +3 more sources
Flame transfer function analysis of hydrogen diffusion swirl flames
Proceedings of the Combustion InstituteProceedings of the Combustion Institute, 40 (1-4)
Guoqing Wang +2 more
exaly +5 more sources
发电技术, 2023 To analyse the dome structure of the lean premixed swirled combustor, the influences of lance tip shapes, inflow air flow rates, numbers and locations of fuel nozzles and head expansion ratios on the combustion flame, flow field and flame dynamic ...
YANG Yang, LI Yaoqiang, ZHANG Jinqi
doaj +1 more source
Flame Detection Method Based on Improved YOLOv5 [PDF]
Jisuanji gongcheng, 2023 The existing image-based flame detection approach finds it challenging to balance real-time and precision, and it is incapable of accurately identifying small flame targets, making it ineffective for application situations such as small fire ...
Lumeng CHEN, Yanyan CAO, Min HUANG, Xingang XIE
doaj +1 more source
Experimental Study on Flame Response Characteristics of a Non-Premixed Swirl Model Combustor
Energies, 2023 Non-premixed swirl combustion has been widely used in pieces of industrial combustion equipment such as industrial boilers, furnaces, and certain specific gas turbine combustors.
Chen Yang +6 more
doaj +1 more source
Fluids, 2022 Convective velocity perturbations (CVPs) are known to play an important role in the response of flames to acoustic perturbations and in thermoacoustic combustion instabilities.
Thomas Steinbacher, Wolfgang Polifke
doaj +1 more source
Bistable swirled flames and influence on flame transfer functions [PDF]
Combustion and Flame, 2014 Large Eddy Simulations (LES) are used to study a lean swirl-stabilized gas turbine burner where the flow exhibits two stable states. In the first one, the flame is attached to the central bluff body upstream of the central recirculation zone which contains burnt gases. In the second one the flame is detached from the central bluff body downecirculation
Hermeth, Sebastian +5 more
openaire +3 more sources
Study on Unstable Combustion Characteristics of Model Combustor with Different Swirler Schemes
Energies, 2022 In this paper, the effect of the swirler scheme on combustion instability is studied. Through the proper orthogonal decomposition (POD) of flame images, Abel inverse transform and other methods, the influence of swirl intensity on the characteristic ...
Jiangang Hao +6 more
doaj +1 more source
Analytical modelling of flame transfer functions for technically premixed flames
International Journal of Spray and Combustion Dynamics, 2022 The linear response to harmonic acoustic excitation of the total heat release rate in technically premixed flames (Flame Transfer Function, FTF) is studied in case of an ideal swirl burner. The analysis is based on the linearization of the production rate for the mean reaction progress variable modelled with a turbulent flame speed closure.
Fernando Biagioli +3 more
openaire +1 more source