Results 1 to 10 of about 34,611 (247)

Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation [PDF]

Scientific Reports
In order to investigate the acoustic oscillation characteristics of gas–liquid pintle rocket engines and elucidate the path by which spray combustion process provides energy to the combustor pressure oscillation, a LOX/GCH4 pintle engine with rectangular
Xuan Jin, Chao Zhu, Dejiang Chen, Zhongpei Zhang   +3 more
doaj   +2 more sources

Research on Dynamic Temperature at Outlet of Centrally Staged Combustor Based on TDLAS Technology [PDF]

Sensors
High-frequency oscillations occur in the centrally staged combustor during operation. To effectively suppress them, real-time monitoring of the combustor exit temperature is critical.
Hui Kuang, Xianpu Zhong, Junhao Wei, Fei Xing, Zhenyin Hai   +4 more
doaj   +2 more sources

Examination of oscillation frequency for combustion oscillation considering acoustic boundary conditions

Nihon Kikai Gakkai ronbunshu, 2018
Hydrogen combustion is attracting attentions because of zero CO2 emission. Recently, a gas turbine which uses hydrogen-rich fuel is being developed. In our previous study, we examined the influence of hydrogen-containing ratio on combustion oscillation ...
Akane UEMICHI, Ippei KANETSUKI, Shigehiko KANEKO   +2 more
doaj   +3 more sources

Acoustic Triggering of Combustion Instability in a Swirling Flame: An Experimental Study

Energies, 2023
Combustion instability is a common thermoacoustic coupling problem in combustion systems, and the pressure oscillations generated inevitably damage the combustion system. Studying the mechanism of combustion instability, especially the triggering problem
Yunpeng Liu, Yingwen Yan, Shoutang Shang, Hongyu Ma   +3 more
doaj   +1 more source

Self-Excited Thermoacoustic Instability Behavior of a Hedge Premixed Combustion System with an Asymmetric Air/Fuel Supply or Combustion Condition

Applied Sciences, 2023
Self-excited thermoacoustic instability (SETAI) is an undesirable and dangerous phenomenon in combustion systems. However, its control is difficult, thus greatly limiting the development of combustion technology.
Yongbo Du, Yuanhang Zhang, Xiaojin Li, Jingkun Zhang, Yaodong Da, Yun Jia, Defu Che   +6 more
doaj   +1 more source

Experimental Studies on Suppression of Combustion Instability with the Addition of Helium [PDF]

Journal of Applied Fluid Mechanics, 2022
When combustion instability occurs, fluctuation in the release of heat couples with oscillating pressure, while the sensitivity of flame to acoustic disturbance restricts the oscillation intensity.
Y. Liu, J. Li, Z. Tian, T. Zhang, Y. Yan
doaj   +1 more source

Analysis on Combustion Instability Characteristics of Model Swirl Combustor With Gas Fuel

发电技术, 2022
Combustion instability is easy to occur under lean combustion of gas turbine. Analyzing and predicting the characteristics of unstable combustion is of great significance to ensure the normal operation of combustion chamber. The flame describing function
HAO Jiangang, GONG Wenming, DING Yang, ZHENG Danwei, LIU Yong   +4 more
doaj   +1 more source

Large-Eddy Simulations of Unsteady Reaction Flow Characteristics Using Four Geometrical Combustor Models

Aerospace, 2023
Combustion instability constitutes the primary loss source of combustion chambers, gas turbines, and aero engines, and it affects combustion performance or results in a sudden local oscillation.
Nan Meng, Feng Li
doaj   +1 more source

Numerical Simulation of Transient Combustion and the Acoustic Environment of Obstacle Vortex-Driven Flow

Energies, 2022
Solid fuel combustion in a chamber does not necessarily occur at a constant rate and may show fluctuations due to variables such as varying burning rates, chamber pressure, and residual combustion.
Afaque Ahmed Bhutto, Khanji Harijan, Mukkarum Hussain, Syed Feroz Shah, Laveet Kumar   +4 more
doaj   +1 more source

Investigation of temporal variation of combustion instability intensity in a back step combustor using LES

Journal of Thermal Science and Technology, 2020
Lean combustion is susceptible to combustion instabilities, especially pressure oscillation, and this severely damages the combustor. To prevent this, many studies have attempted to elucidate this phenomenon.
Jun NAGAO, Abhishek L. PILLAI, Ryoichi KUROSE   +2 more
doaj   +1 more source