Results 21 to 30 of about 21,289 (291)

Simulation of Hydrogen-Air-Diluents Mixture Combustion in an Acceleration Tube with FlameFoam Solver

Energies, 2021
During a severe accident in a nuclear power plant, hydrogen can be generated, leading to risks of possible deflagration and containment integrity failure. To manage severe accidents, great experimental, analytical, and benchmarking efforts are being made
Mantas Povilaitis, Justina Jaseliūnaitė   +1 more
doaj   +1 more source

Simulation of the flame describing function of a turbulent premixed flame using an open-source LES solver [PDF]

, 2014
Numerical simulations were used to characterise the non-linear response of a turbulent premixed flame to acoustic velocity fluctuations. The test flame simulated was the bluff body stabilised flame which has been the subject of a detailed experimental ...
Han, X, Morgans, AS
core   +1 more source

Comparison of soot radiation in diesel flame given by mathematical model and by experimental data

Vietnam Journal of Mechanics, 2007
An integral unidirectional model is established to calculate radiation heat transfer of Diesel flame in the open air and in combustion chamber of engine.
Bui Van Ga, Tran Van Nam, Nguyen Ngoc Linh   +2 more
doaj   +1 more source

Theoretical analysis of the conical premixed flame response to upstream velocity disturbances considering flame speed development effects

Propulsion and Power Research, 2017
The effect of upstream velocity perturbations on the response of a premixed flame was investigated in terms of the flame transfer function dependency on excitation frequency.
Ghazaleh Esmaeelzade, Mohammad Reza Khani, Rouzbeh Riazi, Mohammad Hossein Sabour   +3 more
doaj   +1 more source

LES evaluation of the effects of equivalence ratio fluctuations on the dynamic flame response in a real gas turbine combustion chamber [PDF]

, 2013
Large Eddy Simulations (LES) of a lean swirl-stabilized gas turbine burner are used to analyze mechanisms triggering combustion instabilities. To separately study the effect of velocity and equivalence ratio fluctuations, two LES of the same geometry are
Hermeth, Sebastian, Staffelbach, Gabriel, Gicquel, Laurent, Gicquel, Laurent Y.M., Poinsot, Thierry   +4 more
core   +1 more source

Reconstruction of 3D Temperature Profile of Radiative Participatory Flame Based on Digital Refocusing Technique of Light Field Camera

International Journal of Photoenergy, 2019
Accurate and reliable measurements of the 3D flame temperature profile are highly desirable to achieve in-depth understanding of the combustion and pollutant formation processes.
Biao Zhang, Chen Wang, Yudong Liu, Chuanlong Xu, Qi Qi   +4 more
doaj   +1 more source

Acoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers [PDF]

, 2012
The objectives of this paper are the description of azimuthal instability modes found in annular combus- tion chambers using two numerical tools: (1) Large Eddy Simulation (LES) methods and (2) acoustic solv- ers.
Wolf, Pierre, Staffelbach, Gabriel, Müller, Jens-Dominik, Gicquel, Laurent Y.M., Poinsot, Thierry   +4 more
core   +1 more source

Model Comparisons of Flow and Chemical Kinetic Mechanisms for Methane–Air Combustion for Engineering Applications

Applied Sciences, 2021
The reasonably accurate numerical simulation of methane–air combustion is important for engineering purposes. In the present work, the validations of sub-models were carried out on a laboratory-scale turbulent jet flame, Sandia Flame D, in comparison ...
Di He, Yusong Yu, Yucheng Kuang, Chaojun Wang   +3 more
doaj   +1 more source

CFD-Based Prediction of Combustion Dynamics and Nonlinear Flame Transfer Functions for a Swirl-Stabilized High-Pressure Combustor

Energies, 2023
Thermoacoustic instabilities in gasturbine combustor systems can be predicted in the design phase with a thermoacoustic network model. In this model, the coupling between acoustic pressure fluctuations and the combustion rate is described by the Flame ...
Mehmet Kapucu, Jim B. W. Kok
doaj   +1 more source

Experimental Investigation of Thermoacoustics and High-Frequency Combustion Dynamics with Band Stop Characteristics in a Pressurized Combustor

Energies
In combustor systems, thermoacoustic instabilities may occur and must be avoided for reliable operation. An acoustic network model can be used to predict the eigenfrequencies of the instabilities and the growth rate by incorporating the combustion ...
Mehmet Kapucu, Jim B. W. Kok, Artur K. Pozarlik   +2 more
doaj   +1 more source