Results 71 to 80 of about 108,068 (160)
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
Acoustic Losses in Cryogenic Hydrogen at Transitions Between Tubes of Different Diameters
HydrogenAcoustic oscillations in cryogenic systems can either be imposed intentionally, as in pulse-tube cryocoolers, or occur spontaneously due to Taconis-type thermoacoustic instabilities.
Kian Conroy, Konstantin I. Matveev
doaj +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 +14 more
wiley +1 more source
International Journal of Aerospace Engineering, 2019 The stability of a combustion chamber with a gas-centered swirl coaxial injector is investigated over a wide range of operating conditions in the aspect of thermoacoustic instabilities. First, flame shapes induced by the injector are analyzed for various
Yong Ho Min +2 more
doaj +1 more source
Fluidic Ultrasound Generation for Non‐Destructive Testing
Advanced Materials, Volume 36, Issue 18, May 2, 2024.Air‐coupled ultrasound enables material characterization and fault detection for specimens that are very large or do not allow contact with other materials. This study presents a novel fluidic transducer that can withstand harsh environments and generates a high‐amplitude ultrasonic signal without impedance mismatch to air.
Benjamin Bühling +2 more
wiley +1 more source
Mitigating Thermoacoustic Instabilities in Premixed Hydrogen Flames using Axial Staging [PDF]
In this paper we demonstrate how axial staging can be utilised to mitigate thermoacoustic instabilities in a combustion system by flame redistribution. This is achieved by moving flow to a second stage flame while keeping the combined thermal power and ...
Ånestad, Aksel +3 more
core +1 more source
Research on Suppression of Vibration Caused by Combustion Pressure Pulsation in Aircraft Engines
Shock and Vibration, Volume 2024, Issue 1, 2024.Abnormal high‐energy narrowband signals appeared in the aircraft engine test. By analyzing the characteristics of the vibration signals and the pressure pulsation signals in the measurement point data of the engine, it can be speculated that the abnormal vibration energy of the engine is not related to the operation of rotating parts, which upends a ...
Liang Hong +6 more
wiley +1 more source
Probabilistic machine learning for the elimination of thermoacoustic instabilities [PDF]
Thermoacoustic instabilities have hindered the development of high energy density combustors, such as those in jet engines, gas turbines or rockets, for decades.
core +2 more sources
Modal analysis of low order thermoacoustic systems [PDF]
, 2020 Thermoacoustic instabilities that arise in the context of lean premixed combustion are a major challenge in the development of gas turbines and aero engines.
Sogaro, Francesca M.
core +1 more source
Sound generation and control of thermoacoustic instabilities by nanosecond plasma discharges
, 2016 Sound generation by nanosecond repetitively pulsed plasma discharges is investigated experimentally. High voltage pulses of 10 nanosecond duration provide rapid heating of the air.
Bölke, Olaf +2 more
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