Results 61 to 70 of about 176 (165)

Experimental and 2D CFD study of thermoacoustic instabilities

Journal of Thermal Engineering
Thermoacoustic instability, caused by the interaction of unsteady heat release and acoustic waves, is a significant challenge in combustion systems such as gas turbines and aero engines.
Suchita K. Kadam, Nilaj N. Deshmukh
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, Chao-Ping Zang, He-Jiong Ji, Qiu-Xia Yu, Yun-Fan Jiang, Lian Shen, Cong Gao   +6 more
wiley   +1 more source

Acoustic Losses in Cryogenic Hydrogen at Transitions Between Tubes of Different Diameters

Hydrogen
Acoustic 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

Thermoacoustic Stability Boundaries in the Model Combustion Chamber with a Gas-Centered Swirl Coaxial Injector

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, Chae Hoon Sohn, Youngbin Yoon   +2 more
doaj   +1 more source

Learning and Characterizing Chaotic Attractors of a Lean Premixed Combustor

Energies
This paper is about the characteristics of and a method to recognize the onset of limit cycle thermoacoustic oscillations in a gas turbine-like combustor with a premixed turbulent methane/air flame.
Sara Navarro-Arredondo, Jim B. W. Kok
doaj   +1 more source

Study on thermoacoustic instabilities in an aircraft engine combustor using 1D network model

Case Studies in Thermal Engineering
The purpose of this study was to evaluate the combustion instability characteristics of target aircraft combustors under development using network thermoacoustic (TA) models.
Juchan Son, Seungchai Jung, Shaun Kim, Daesik Kim   +3 more
doaj   +1 more source

Experimental Investigation of Thermoacoustics and High-Frequency Combustion Dynamics with Band Stop Characteristics in a Pressurized Combustor

Energies
In combustor systems, thermoacoustic instabilities may occur and must be avoided for reliable operation. An acoustic network model can be used to predict the eigenfrequencies of the instabilities and the growth rate by incorporating the combustion ...
Mehmet Kapucu, Jim B. W. Kok, Artur K. Pozarlik   +2 more
doaj   +1 more source

Boundaries of thermoacoustic instability in the thermoacoustic engine with cryogenic cooling [PDF]

Journal International Academy of Refrigeration, 2020
E.A. Zinoviev, G.V. Vorotnikov, A.I. Dovgyallo, S.O. Nekrasova   +3 more
openaire   +1 more source

Benchmarking machine learning models against full-scale acoustic absorption measurements in gas turbine liners

Fuel Communications
Accurate prediction of acoustic energy absorption in gas turbine combustors is critical for enhancing performance, mitigating thermoacoustic instabilities, and reducing emissions.
Abdullah Shahjalal, Roy Kalawsky, Demetrios Joannou, Faruk Ozdemir   +3 more
doaj   +1 more source

Modeling and control of thermoacoustic instabilities

, 2003
This work deals with modeling and control of thermoacoustic combustion instabilities in lean premixed combustion systems. Because of the complex interactions present in thermoacoustic systems, a network modeling approach is used. The model of each network element or subsystem is obtained analytically, numerically, or by making use of experimental ...
openaire   +1 more source