Experimental sensitivity analysis and control of thermoacoustic systems [PDF]
, 2015 In this paper, we report the results of an experimental sensitivity analysis on a thermoacoustic system – an electrically heated Rijke tube. We measure the change of the linear stability characteristics of the system, quantified as shifts in the growth ...
Jamieson, NP +3 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 +14 more
wiley +1 more source
Exploring liquid fuel combustion dynamics in a swirl burner using dynamic mode decomposition
Engineering Applications of Computational Fluid MechanicsAero gas turbine engine combustors are transitioning from traditional Rich-Quench-Lean (RQL) staging to Lean Premixed Prevaporized (LPP) operation to reduce harmful NOx emissions and improve combustion efficiency.
Alireza Ghasemi, Jim B. W. Kok
doaj +1 more source
Effects of liquid fuel/wall interaction on thermoacoustic instabilities in swirling spray flames
Combustion and Flame, 2020 Computational prediction of thermoacoustic instabilities arising in gas turbine and aero-engine combustors still remains a challenge especially if fuel is injected in a liquid spray form.
E. Lo Schiavo +4 more
semanticscholar +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
Acoustic Design Parameter Change of a Pressurized Combustor Leading to Limit Cycle Oscillations
EnergiesWhen aiming to cut down on the emission of nitric oxides by gas turbine engines, it is advantageous to have them operate at low combustion temperatures. This is achieved by lean premixed combustion.
Mehmet Kapucu +2 more
doaj +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
Accounting for Acoustic Damping in a Helmholtz Solver [PDF]
, 2017 Thermoacoustic Helmholtz solvers provide a cheap and efficient way of predicting combustion instabilities. However, because they rely on the inviscid Euler equations at zero Mach number, they cannot properly describe the regions where aerodynamics may ...
Miguel-Brebion, Maxence +3 more
core +3 more sources
Investigation of High-Frequency Thermoacoustic Instabilities
, 2021 Dissertation, Universität Duisburg-Essen ...
openaire +3 more sources
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