Results 21 to 30 of about 463,023 (218)

Numerical Simulation of Hot Jet Detonation with Different Ignition Positions

Applied Sciences, 2019
Ignition position is an important factor affecting flame propagation and deflagration-to-detonation transition (DDT). In this study, 2D reactive Navier−Stokes numerical studies have been performed to investigate the effects of ignition position on ...
Hongtao Zheng, Shizheng Liu, Ningbo Zhao, Xiang Chen, Xiongbin Jia, Zhiming Li   +5 more
doaj   +1 more source

Experimental observation of the TJI-initiated HPDI gas combustion: Vertically crossed flame jet and methane jet

Applications in Energy and Combustion Science, 2023
In the field of natural gas marine engines, the high-pressure direct injection (HPDI) technology is widely used to achieve emission reduction while maintaining equivalent thermal efficiency and power output compared to diesel engines.
Lijia Zhong, Wanhui Zhao, Haiqiao Wei, Lei Zhou   +3 more
doaj   +1 more source

Quantitative Assessment of Flame Stability Through Image Processing and Spectral Analysis [PDF]

, 2015
This paper experimentally investigates two generalized methods, i.e., a simple universal index and oscillation frequency, for the quantitative assessment of flame stability at fossil-fuel-fired furnaces.
Zhou, Hao, Liu, Shi, Sun, Duo, Yan, Yong, Lu, Gang   +4 more
core   +1 more source

Experimental assessment of the impact of variation in jet fuel properties on spray flame liftoff height

Applications in Energy and Combustion Science, 2021
Ensuring efficient and clean combustion performance of liquid-fueled engines requires comprehension of the influence of fuel composition and properties on flame behavior, such as flame liftoff height (LOH) and lean blowout limit (LBO).
Radi Alsulami, Stephen Lucas, Brye Windell, Mitchell Hageman, Bret Windom   +4 more
doaj   +1 more source

Characterization of the effects of a plasma injector driven by AC dielectric barrier discharge on ethylene-air diffusion flame structure

Open Physics, 2020
A dielectric barrier discharge plasma controlled diffusion flame experimental system was built based on the designed coaxial swirling plasma injector. The air plasma was generated within the annulus gap of the injector by alternating current dielectric ...
Zheng Zhi, Nie Wansheng, Zhou Siyin, Tian Yuan, Zhu Yangzhu, Shi Tianyi, Tong Yiheng   +6 more
doaj   +1 more source

Improving combustion performance of swirling double-concentric jets flames with rich equivalence ratios

Case Studies in Thermal Engineering, 2020
The acoustic excitation method was used to improve the combustion performance of rich-combustion flames of swirling dual-disk double-concentric jets. The unexcited and excited conditions were compared.
Omid Ali Zargar
doaj   +1 more source

Numerical Investigation of the Effects of Diffusion Time on the Mechanisms of Transition from a Turbulent Jet Flame to Detonation in a H₂-Air Mixture

Fire, 2023
The current study primarily aimed to simulate detonation initiation via turbulent jet flame acceleration in partial-premixed H2-air mixtures. Different vertical concentration gradients were generated by varying the duration of hydrogen injection ...
Mohammad Hossein Shamsaddin Saeid, Javad Khadem, Sobhan Emami, Chang Bo Oh   +3 more
doaj   +1 more source

Improvement of Laminar Lifted Flame Stability Excited by High-Frequency Acoustic Oscillation

Journal of Thermal Science and Technology, 2009
A high-frequency (20kHz) standing wave was applied to the unburned mixture upstream of a methane-air lifted jet flame using a bolt-clamped Langevin transducer (BLT) to improve stability.
Mitsutomo HIROTA, Kota HASHIMOTO, Hiroki OSO, Goro MASUYA   +3 more
doaj   +1 more source

Numerical Investigation on the Jet Characteristics and Combustion Process of an Active Prechamber Combustion System Fueled with Natural Gas

Energies, 2022
An active prechamber turbulent ignition system is a forced ignition method for internal combustion engines fueled with low reactivity fuels, i.e., natural gas and gasoline, which could expand the lean-burn limit, promote flame propagation, and ensure ...
Lina Xu, Gang Li, Mingfa Yao, Zunqing Zheng, Hu Wang   +4 more
doaj   +1 more source

Anchoring of premixed jet flames in vitiated crossflow with pulsed nanosecond spark discharge

Applications in Energy and Combustion Science, 2020
This paper deals with the effect of non-equilibrium plasma on the anchoring of a premixed jet flame in hot vitiated crossflow at atmospheric pressure. The turbulent vitiated crossflow was generated by an array of 4×4 premixed turbulent jet flames burning
Sergey Shcherbanev, Titouan Morinière, Roberto Solana-Pérez, Markus Weilenmann, Yuan Xiong, Ulrich Doll, Nicolas Noiray   +6 more
doaj   +1 more source