Results 71 to 80 of about 2,865 (193)

Simultaneous 10 kHz PIV/OH-PLIF/chemiluminescence and conjoint data analysis approach for thermoacoustic oscillation near lean blowout

Applications in Energy and Combustion Science
Simultaneous multi-parameter experimental data characterizing the flow-combustion interaction process are of great significance for understanding the flame instability mechanism in combustion systems.
Zhen Cao, Wenbei Liu, Xin Yu, Bin Hu, Jiangbo Peng, PengHua Qiu, Chaobo Yang   +6 more
doaj   +1 more source

Study on Unstable Combustion Characteristics of Model Combustor with Different Swirler Schemes

Energies, 2022
In this paper, the effect of the swirler scheme on combustion instability is studied. Through the proper orthogonal decomposition (POD) of flame images, Abel inverse transform and other methods, the influence of swirl intensity on the characteristic ...
Jiangang Hao, Yang Ding, Chen Yang, Xuhuai Wang, Xiang Zhang, Yong Liu, Feng Jin   +6 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, Stefan Maack, Christoph Strangfeld   +2 more
wiley   +1 more source

A Real-Time Combustion Instability Simulation with Comprehensive Thermo-Acoustic Dynamic Model

Energies, 2018
The thermo-acoustic instability in the combustion process of a gas turbine is caused by the interaction of the heat release mechanism and the pressure perturbation.
Jaeyoung Han, Jiwoong Jeong, Kyungin Cho, Sangseok Yu   +3 more
doaj   +1 more source

Time reversal in thermoacoustic tomography - an error estimate [PDF]

, 2009
The time reversal method in thermoacoustic tomography is used for approximating the initial pressure inside a biological object using measurements of the pressure wave made on a surface surrounding the object.
Agranovsky M, Courant R, Egorov Y V, Evans L C, Finch D, Finch D, Fink M, Fink M, Hristova Y, Lions J L, Lions J L, Nguyen L, Nirenberg L, Patch S, Pauen R, Ralston J, Taylor Michael E, Vainberg B R, Wang L V, Yulia Hristova   +19 more
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, Chao-Ping Zang, He-Jiong Ji, Qiu-Xia Yu, Yun-Fan Jiang, Lian Shen, Cong Gao   +6 more
wiley   +1 more source

Influence of Flow Rate Distribution on Combustion Instability of Hypergolic Propellant

Aerospace, 2022
Combustion instability is the biggest threat to the reliability of liquid rocket engines, whose prediction and suppression are of great significance for engineering applications.
Yushan Gao, Bingbing Zhang, Jinbo Cheng, Jingxuan Li, Qingfei Fu   +4 more
doaj   +1 more source

Stabilization of acoustic modes using Helmholtz and Quarter-Wave resonators tuned at exceptional points

, 2018
Acoustic dampers are efficient and cost-effective means for suppressing thermoacoustic instabilities in combustion chambers. However, their design and the choice of their purging air mass flow is a challenging task, when one aims at ensuring ...
Bourquard, Claire, Noiray, Nicolas
core   +1 more source

Nonlinear hydrodynamic and thermoacoustic oscillations of a bluff-body stabilised turbulent premixed flame [PDF]

, 2016
Turbulent premixed flames often experience thermoacoustic instabilities when the combustion heat release rate is in phase with acoustic pressure fluctuations.
Cant, RS, Juniper, MP, Lee, CY, Li, LKB
core   +3 more sources

Investigation of High-Frequency Thermoacoustic Instabilities

, 2021
Dissertation, Universität Duisburg-Essen ...
openaire   +3 more sources