Results 21 to 30 of about 70,875 (242)

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

Effect of CO2 Dilution on the Structure and Emissions from Turbulent, Non-premixed Methane-Air Jet Flames [PDF]

, 2017
This investigation gives a comparison of the variation of temperature and gas compositions in lifted, turbulent non-premixed methane–air jet flames firing vertically into still air with different carbon dioxide diluent concentrations in the fuel jet. The
Erete, JI, Fairweather, M, Hughes, KJ, Ma, L, Pourkashanian, M, Williams, A   +5 more
core   +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

Revisiting Fire Safety Guidelines in CO₂ Laser Airway Surgery. [PDF]

Laryngoscope
This experimental study evaluates fire risk during CO2 laser airway surgery using high‐flow and jet ventilation in a porcine model. Results showed that laser wattage had a greater influence on fire risk than FiO2, with jet ventilation consistently producing expansive flames.
Roitman A, Dailey SH, Wilson M, Bowen AJ, Schroeder KM, Thibeault SL.   +5 more
europepmc   +2 more sources

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

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

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

Local burning velocity in a Bunsen jet flame [PDF]

, 2012
A PIV-based system has been set-up for the simultaneous measurement of the local burning velocity of premixed flames and the flame stretch due to the flame front curvature and the incoming flow strain rate.
Castillo, J.L., García-Soriano, G., García-Ybarra, P.L., Higuera Antón, Francisco   +3 more
core   +3 more sources

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