Results 51 to 60 of about 175 (164)
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
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
Learning and Characterizing Chaotic Attractors of a Lean Premixed Combustor
EnergiesThis 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
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Study on thermoacoustic instabilities in an aircraft engine combustor using 1D network model
Case Studies in Thermal EngineeringThe purpose of this study was to evaluate the combustion instability characteristics of target aircraft combustors under development using network thermoacoustic (TA) models.
Juchan Son +3 more
doaj +1 more source
EnergiesIn 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 +2 more
doaj +1 more source
Review of acoustic field effects on flame dynamics and combustion applications
International Journal of Coal Science & TechnologyAcoustic-flame coupling technology is an interdisciplinary frontier field investigating the complex interactions between sound waves and combustion. Generally, the acoustic field can be divided into two modes based on its relative position to the flame ...
Zhiwei Su, Yaoyao Ying, Dong Liu
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Boundaries of thermoacoustic instability in the thermoacoustic engine with cryogenic cooling [PDF]
Journal International Academy of Refrigeration, 2020 E.A. Zinoviev +3 more
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MODELING AND ACTIVE CONTROL OF THERMOACOUSTIC INSTABILITIES
IFAC Proceedings Volumes, 2005 Abstract Due to stringent emission regulations, modern gas turbines work in lean premixed mode and thermoacoustic instabilities are often observed. They cause mechanical damage and therefore have to be reduced. This paper describes the development of an acoustic network model for a lab-scale lean premixed methane combustor at ETH Zurich. The model is
André S.P. Niederberger +2 more
openaire +1 more source
EnergiesAmmonia (NH3) is a promising carbon-free energy carrier for low-carbon power generation. However, in turbulent ammonia–methane (NH3-CH4) premixed swirling flames, operating at lean conditions to limit NOX, emissions can trigger strong thermoacoustic ...
Junhui Ma +7 more
doaj +1 more source