Results 61 to 70 of about 2,929 (210)
Excitation of the precessing vortex core by active flow control to suppress thermoacoustic instabilities in swirl flames [PDF]
, 2019 In this study, we apply periodic flow excitation of the precessing vortex core at the centerbody of a swirl-stabilized combustor to investigate the impact of the precessing vortex core on flame shape, flame dynamics, and especially thermoacoustic ...
Lückoff, Finn, Oberleithner, Kilian
core +1 more source
On the Adjoint Operator in Photoacoustic Tomography [PDF]
, 2016 Photoacoustic Tomography (PAT) is an emerging biomedical "imaging from coupled physics" technique, in which the image contrast is due to optical absorption, but the information is carried to the surface of the tissue as ultrasound pulses. Many algorithms
Arridge, Simon R. +4 more
core +2 more sources
Detached Eddy Simulation (DES) of a Turbulent Premixed Flame Stabilized on a Bluff Body
Proceedings in Applied Mathematics and Mechanics, Volume 25, Issue 2, June 2025.ABSTRACT As the demand for net‐zero emissions intensifies, low‐emission fuels (LEFs) are increasingly explored for their potential to reduce pollutants in combustion systems. The present study investigates the flame dynamics and pollutant emissions (CO and NOx) of different LEFs using detached eddy simulations (DES), a method that offers better ...
Abdelkader Hemaizia +2 more
wiley +1 more source
IET Control Theory &Applications, Volume 19, Issue 1, January/December 2025.This paper proposes an observer‐based adaptive output‐feedback boundary control to stabilize the vibrations of the moving cage of a dual‐cable mining elevator. This system is comprised of two mechanically jointed winding drums that drive the two cables through the floating sheaves to lift the cage.
Elham Aarabi +2 more
wiley +1 more source
Bifurcation Dodge: Avoidance of a Thermoacoustic Instability under Transient Operation
, 2018 Varying one of the governing parameters of a dynamical system may lead to a critical transition, where the new stable state is undesirable. In some cases, there is only a limited range of the bifurcation parameter that corresponds to that unwanted ...
Bonciolini, Giacomo, Noiray, Nicolas
core +1 more source
Simulation of 2-way fluid structure interaction in a 3D model combustor [PDF]
, 2012 The liner of a gas turbine combustor is a very flexible structure that is exposed to the pressure oscillations that occur in the combustor. These pressure oscillations can be of very high amplitude due to thermoacoustic instability, when the fluctuations
Alemela, P.R., Kok, J.B.W., Shahi, M.
core +3 more sources
A Review on Combustion Instability of Hydrogen-Enriched Marine Gas Turbines
Journal of Marine Science and EngineeringHydrogen is widely regarded as a promising carbon-free alternative fuel. However, the development of low-emission marine gas turbine combustion systems has been hindered by the associated risks of combustion instability, also termed as thermoacoustic ...
Jiaying Cheng +4 more
doaj +1 more source
Study of burner geometry effects on non-premixed flame response under acoustic excitation
Journal of Low Frequency Noise, Vibration and Active Control, 2019 The study of the flame under the acoustic excitation contributes to the study of flame self-excited thermoacoustic instability. Although non-premixed combustion is widely used in industry, research on its combustion instability characteristics is ...
Hao Zhou +3 more
doaj +1 more source
Aerospace, 2022 In order to study the influence of streamwise forcing on the formation mechanism of liquid ligaments and droplets in the primary breakup process of liquid circular jet, the VOF interface capturing method-based direct numerical simulation was adopted, and
Chenglin Zhou, Jianfeng Zou, Yang Zhang
doaj +1 more source
, 2007 We report on a new type of localized structure, an ultrasonic cavity soliton, supported by large aspect-ratio acoustic resonators containing viscous media.
de Valcarcel, G. J. +2 more
core +1 more source