Results 31 to 40 of about 656,343 (134)

Numerical investigation of forced ignition in laminar counterflow non-premixed methane-air flames

, 2007
Simulations of forced ignition of non-premixed laminar counterflow flames are used to study the effect of strain rate on ignition success. A one dimensional calculation is performed, using detailed methane chemical kinetics and treating the spark as an ...
Richardson, E.S., Mastorakos, E.
core   +1 more source

Mixing Characteristics of Transverse Jet Injection into Supersonic Flow after Rearward-Facing Step

Advances in Mechanical Engineering, 2013
Transverse injection into supersonic flow after rearward-facing step combines a simple way to improve mixing and flameholding in Scramjet engines.
Jinshui Wu, Hongbo Wang, Mingbo Sun, Shunpin Zhang, Zhenguo Wang   +4 more
doaj   +1 more source

Insights on prechamber enabled mixing-controlled combustion (PC-MCC) with methanol in an optical heavy-duty engine

Applications in Energy and Combustion Science
Prechamber enabled mixing-controlled combustion (PC-MCC) utilizes an actively fueled prechamber as an ignition assistant to promote diffusion combustion of low cetane fuels.
Jared Zeman, Adam Dempsey, Aidan Mellesmoen, Vasco Omar Duke-Walker, Ales Srna   +4 more
doaj   +1 more source

Modelling of combustion and knock onset risk in a high-performance turbulent jet ignition engine

Transportation Engineering, 2020
The reduction of CO2 emissions, and hence of fuel consumption, is currently a key driver for the development of innovative SI engines for passenger car applications.
Andrea Bianco, Federico Millo, Andrea Piano   +2 more
doaj   +1 more source

Ultra-Lean Premixed Turbulent Combustion: Challenges of RANS Modelling

Energies, 2022
The main challenge of improving spark ignition (SI) engines to achieve ever increasing thermal efficiencies and near-zero pollutant emissions today concerns developing turbulent combustion under homogeneous ultra-lean premixed mixtures (HULP).
Lorenzo Sforza, Suliman Abdelwahid, Tommaso Lucchini, Angelo Onorati   +3 more
doaj   +1 more source

An Experimental Study on the Effects of Pre-Chamber Geometry on the Combustion Characteristics of Ammonia/Air Mixtures Using Turbulent Jet-Post Spark Ignition Strategy

Energies
As a carbon-free fuel, ammonia faces challenges in engine applications due to its low flame propagation speed and high ignition energy. The pre-chamber turbulent jet-post spark ignition strategy (TJ-PSI) has been proven effective in accelerating the ...
Yichen Gao, Xipu Zhang, Yang Cao, Jiashen Zhang, Rongjie Li, Huimin Wu, Shijun Dong, Zhaowen Wang   +7 more
doaj   +1 more source

Blast Wave Generated by Delayed Ignition of Under-Expanded Hydrogen Free Jet at Ambient and Cryogenic Temperatures

Hydrogen, 2022
An under-expanded hydrogen jet from high-pressure equipment or storage tank is a potential incident scenario. Experiments demonstrated that the delayed ignition of a highly turbulent under-expanded hydrogen jet generates a blast wave able to harm people ...
Donatella Cirrone, Dmitriy Makarov, Andreas Friedrich, Joachim Grune, Keiji Takeno, Vladimir Molkov   +5 more
doaj   +1 more source

Assessment of the measurement capabilities of hydrogen and ammonia mixture combustion in a TJI engine

Pojazdy Szynowe
The combustion of zero-emission fuels such as hydrogen and ammonia is one of the key directions in the search for alternatives to fossil fuels. Co-combustion of these fuels is possible through the use of a two-stage combustion system.
Bartosz Kaźmierczak, Ireneusz Pielecha
doaj   +1 more source

Study in the Approach Prediction Ability of the Euler PDF Transport by Different Models of Turbulence

Chemical Engineering Transactions, 2018
The main objective of this study is the evaluation of the numerical capacity of the RANS-EPDF hybrid method, by comparing different turbulence models, with numerical simulations in a turbulent jet flame (hydrogen / air), using the method of Eulerian ...
Rouan Serik Habib, Abdelhamid Bounif, Mohamed Bouzit, Ahmed Amine Larbi   +3 more
doaj   +1 more source

An improved thermal jet for the propellant launching system

Case Studies in Thermal Engineering, 2023
This work is focused to study the energy release and flow behavior of liquid propellant during internal ballistics cycle of liquid launching system on the base of the thermal gas jet.
Xiaochun Xue, Yonggang Yu
doaj   +1 more source