Results 61 to 70 of about 176 (166)
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
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
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
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
Boundaries of thermoacoustic instability in the thermoacoustic engine with cryogenic cooling [PDF]
Journal International Academy of Refrigeration, 2020 E.A. Zinoviev +3 more
openaire +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
doaj +1 more source
Time Series and Spectral Analysis of Thermoacoustic Oscillations for Propane-Oxyfuel Combustion in a Swirl-Stabilized, Nonpremixed Combustor. [PDF]
ACS Omega, 2023 Talal Q +4 more
europepmc +1 more source