Results 61 to 70 of about 1,003 (200)
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
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
Suppression of Thermoacoustic Instabilities Using An Electric Field and Feedback Control
, 2022 In this work, a mechanism is developed for an electric field to modulate the heat-release of a laminar flame. This mechanism is then used with a feedback controller to suppress thermoacoustic instabilities in a Rijke tube.
Dustin L Cruise (13130481)
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
Large-Eddy Simulation of combustion instabilities in a variable-length combustor. [PDF]
, 2013 This article presents a simulation of a model rocket combustor with continuously variable acoustic properties thanks to a variable-length injector tube. Fully compressible Large-Eddy Simulations are conducted using the AVBP code.
Garby, Romain +5 more
core +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
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
Flow Characterisation of Flames in an Acoustically Excited Chamber [PDF]
, 2012 Flame-acoustic wave interactions have been studied widely in the combustion community; however the whole physicochemical mechanism is still not clear.
Chen, Li-Wei
core
, 2021 Euler Lagrange Large Eddy Simulations on the impact of spray angle on thermoacoustic instabilities in swirling spray ...
Lo Schiavo Ermanno +4 more
core +1 more source
Flame macrostructures and thermoacoustic instabilities in strati fied swirling flames [PDF]
, 2018 The present article investigates the correlation between flame macrostructures and thermoacoustic combustion instabilities in stratified swirling flames.
Laera, Davide +5 more
core +2 more sources