Results 51 to 60 of about 2,929 (210)

Suppression Mechanisms of Stratified Jet-in-Crossflow on Thermoacoustic Instability and NOx Emissions in Premixed Combustors

open access: yesApplied Sciences
The premixed combustion of a gas turbine is prone to thermoacoustic oscillation, which affects the safety of combustion systems. This study experimentally investigated the suppression mechanism of a stratified jet-in-crossflow on the thermoacoustic ...
Rongyue Sun, Chengfei Tao
doaj   +1 more source

Limit-Cycle Properties of a Rijke Tube [PDF]

open access: yes, 2003
Thermoacoustic instability appears when unsteady heat release is favourably coupled with acoustic pressure perturbations. The important technical applications involving thermoacoustics are combustion instability in rocket motors and low-pollutant lean ...
Culick, F. E. C., Matveev, K. I.
core  

Energizing Change: Liquid‐Metal‐Enabled Nanogenerators for Smart Textiles

open access: yesSmall Structures, Volume 7, Issue 3, March 2026.
This review highlights how liquid metals (LMs) improve energy‐harvesting smart textiles through flexible, conductive, and stable electrodes, enhancing the performance of piezoelectric and triboelectric nanogenerators. It explores LM chemistry, device innovations, textile compatibility, and future challenges, offering a roadmap for practical ...
Kamyar Shirvanimoghaddam   +4 more
wiley   +1 more source

Responsive liquid metal materials towards unstructured environment

open access: yesResponsive Materials, Volume 4, Issue 1, February 2026.
Room‐temperature liquid metals integrate conductivity, deformability, and interfacial dynamics, enabling robust performance in unstructured environments. This review highlights key properties, requirements, and applications across in vivo, underwater, natural, space, and radiation settings, with advances in sensing, actuation, thermal regulation, and ...
Bo Yuan   +5 more
wiley   +1 more source

Investigation on the stability of the Rijke-type thermoacoustic system with an axially distributed heat source

open access: yesJournal of Low Frequency Noise, Vibration and Active Control
Due to the incurred damages to the combustors, large-amplitude self-sustained thermoacoustic oscillations are unwanted in many propulsion systems, such as liquid/solid rocket motors and aero-engines.
Kai Pang   +4 more
doaj   +1 more source

Three-Dimensional Numerical Analysis of Longitudinal Thermoacoustic Instability in a Single-Element Rocket Combustor

open access: yesFrontiers in Energy Research, 2022
This study numerically investigated the thermoacoustic combustion instability characteristics of a scaled rocket combustor based on a hybrid of the Reynolds-averaged Navier–Stokes and large–eddy simulation method.
Guo Kangkang   +4 more
doaj   +1 more source

Stabilization of acoustic modes using Helmholtz and Quarter-Wave resonators tuned at exceptional points

open access: yes, 2018
Acoustic dampers are efficient and cost-effective means for suppressing thermoacoustic instabilities in combustion chambers. However, their design and the choice of their purging air mass flow is a challenging task, when one aims at ensuring ...
Bourquard, Claire, Noiray, Nicolas
core   +1 more source

A Green's function approach to predict nonlinear thermoacoustic instabilities in combustors [PDF]

open access: yes, 2016
The prediction of thermoacoustic instabilities is fundamental for combustion systems such as domestic burners and industrial gas turbine engines. High-amplitude pressure oscillations cause thermal and mechanical stress to the equipment, leading to ...
Bigongiari, A, Heckl, MA
core   +2 more sources

Automatic Adaptive and Targeted Localized Refinement in Transient Structural Dynamic Simulations Using the Multiresolution Finite Wavelet Domain Method

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 127, Issue 1, 15 January 2026.
ABSTRACT The multiresolution finite wavelet domain method has been meticulously studied in numerous wave propagation simulations, showing excellent convergence properties and very fast computing times. The multiresolution procedure always starts with the coarse solution, and then finer solutions can be superimposed on the coarse solution until ...
Dimitris Dimitriou   +2 more
wiley   +1 more source

Determining both sound speed and internal source in thermo- and photo-acoustic tomography

open access: yes, 2015
This paper concerns thermoacoustic tomography and photoacoustic tomography, two couple-physics imaging modalities that attempt to combine the high resolution of ultrasound and the high contrast capabilities of electromagnetic waves.
Liu, Hongyu, Uhlmann, Gunther
core   +2 more sources

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