Results 61 to 70 of about 2,865 (193)

High-fidelity simulation of an ultrasonic standing-wave thermoacoustic engine with bulk viscosity effects

, 2017
We have carried out boundary-layer-resolved, unstructured fully-compressible Navier--Stokes simulations of an ultrasonic standing-wave thermoacoustic engine (TAE) model.
Bhatia A. B., Flitcroft M., Ham F., Pierce A. D., Swift G. W.   +4 more
core   +1 more source

Progress in analytical methods to predict and control azimuthal combustion instability modes in annular chambers [PDF]

, 2016
Longitudinal low-frequency thermoacoustic unstable modes in combustion chambers have been intensively studied experimentally, numerically, and theoretically, leading to significant progress in both understanding and controlling these acoustic modes ...
Bauerheim, Michaël, Nicoud, Franck, Poinsot, Thierry   +2 more
core   +3 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, Dominique Thévenin, Cheng Chi   +2 more
wiley   +1 more source

Effect of Streamwise Perturbation Frequency on Formation Mechanism of Ligament and Droplet in Liquid Circular Jet

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

Adaptive Vibration Control of the Moving Cage in the 4 ×$\times$ 4 Hyperbolic PDE‐ODE Model of the Dual‐Cable Mining Elevator

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, Mohammadali Ghadiri‐Modarres, Mohsen Mojiri   +2 more
wiley   +1 more source

A Review on Combustion Instability of Hydrogen-Enriched Marine Gas Turbines

Journal of Marine Science and Engineering
Hydrogen 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, Bin Hu, Zhilin Zeng, Jinhai Fu, Boyang Zhang   +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, Sheng Meng, Chengfei Tao, Zihua Liu   +3 more
doaj   +1 more source

3D convolutional selective autoencoder for instability detection in combustion systems

Energy and AI, 2021
While analytical solutions of critical (phase) transitions in dynamical systems are abundant for simple nonlinear systems, such analysis remains intractable for real-life dynamical systems. A key example is thermoacoustic instability in combustion, where
Tryambak Gangopadhyay, Vikram Ramanan, Adedotun Akintayo, Paige K Boor, Soumalya Sarkar, Satyanarayanan R Chakravarthy, Soumik Sarkar   +6 more
doaj   +1 more source

A mathematical model and inversion procedure for Magneto-Acousto-Electric Tomography (MAET)

, 2011
Magneto-Acousto-Electric Tomography (MAET), also known as the Lorentz force or Hall effect tomography, is a novel hybrid modality designed to be a high-resolution alternative to the unstable Electrical Impedance Tomography.
Agranovsky M, Ambartsoumian G Patch S Oraevsky A A Wang L V, Barber D C, Borcea L, Colton D, Gilbarg D, Haider S, Hristova Y, Kuchment P, Kunyansky L, Kunyansky L, Kunyansky L, Kunyansky L, Kunyansky L Kuchment P, Leonid Kunyansky, Oraevsky A A, Stewart A M, Vladimirov V S   +17 more
core   +1 more source

Boosting flexible electronics with integration of two‐dimensional materials

InfoMat, Volume 6, Issue 7, July 2024.
The progress was summarized in the flexible electronics empowered by the two‐dimensional materials, including electronic skins (for sweat and temperature sensors), gas sensors, touch pads, nanogenerators for mechanical energy collection, flexible supercapacitors and batteries, transistors and logic circuits, as well as memristors for neuromorphic ...
Chongyang Hou, Shuye Zhang, Rui Liu, Thomas Gemming, Alicja Bachmatiuk, Hongbin Zhao, Hao Jia, Shirong Huang, Weijia Zhou, Jian‐Bin Xu, Jinbo Pang, Mark H. Rümmeli, Jinshun Bi, Hong Liu, Gianaurelio Cuniberti   +14 more
wiley   +1 more source