Results 1 to 10 of about 27,377 (109)

CFD Optimization of the Pre-Chamber Geometry for a Gasoline Spark Ignition Engine [PDF]

Frontiers in Mechanical Engineering, 2021
In the present paper, an efficient optimization method based on Bayesian updating strategy is developed for the design of a spark-ignition engine equipped with pre-chamber.
Haiwen Ge, Ahmad Hadi Bakir, Suren Yadav, Yunseon Kang, Siva Parameswaran, Peng Zhao   +5 more
doaj   +4 more sources

Optimization of Pre-Chamber Geometry and Operating Parameters in a Turbulent Jet Ignition Engine

Energies, 2022
A turbulent jet ignition engine enables operation with lean mixtures, decreasing nitrogen oxide (NOX) emissions up to 92%, while the engine efficiency can be increased compared to conventional spark-ignition engines.
Viktor Dilber, Momir Sjerić, Rudolf Tomić, Josip Krajnović, Sara Ugrinić, Darko Kozarac   +5 more
doaj   +4 more sources

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   +4 more sources

Influence of Pre-Chamber Volume, Orifice Diameter and Orifice Number on Performance of Pre-Chamber SI Engine—An Experimental and Numerical Study

Energies, 2023
This paper presented an experimental and numerical study of pre-chamber volume, number of orifices and orifice diameter influence on engine performance and emissions.
Rudolf Tomić, Momir Sjerić, Josip Krajnović, Sara Ugrinić   +3 more
doaj   +3 more sources

Study on the effects of narrow-throat pre-chamber geometry on the pre-chamber jet velocity using dual formaldehyde PLIF imaging

Combustion and Flame, 2022
The effects of narrow-throat pre-chamber geometry on the main chamber combustion were investigated on a heavy-duty optical engine fueled with methane. Simultaneous dual formaldehyde PLIF imaging and OH* chemiluminescence imaging were applied to characterize the early-stage formaldehyde jet and flame jet discharge process.
Qinglong Tang, Ramgopal Sampath, Priybrat Sharma   +2 more
exaly   +3 more sources

Experimental Study of the Effects of Pre-Chamber Geometry on the Combustion Characteristics of an Ammonia/Air Pre-Mixture Ignited by a Jet Flame

Processes, 2022
In the future, ammonia is expected to become a carbon-free fuel for internal combustion engines. However, the flammability of ammonia is poorer compared to conventional fuels such as gasoline and diesel fuel. Pre-chamber jet ignition may be an effective way to ensure stable ignition and enhance the combustion of ammonia.
Zechuan Cui, Xiaolei Zhang, Wuqiang Long   +2 more
exaly   +2 more sources

Extensive validation of a combustion and pollutant emission model of a pre-chamber engine including different pre-chamber geometries

Fuel
In this work, a 0D/1D model of a single-cylinder pre-chamber spark ignition (PCSI) engine is extensively validated with experimental data in terms of performance, combustion, and emissions by varying the pre-chamber geometry and operating conditions. In the first stage, an experimental study is carried out on the PCSI engine at 1600 rpm and wide-open ...
Fabio Bozza, Luigi Teodosio, Momir Sjerić   +2 more
exaly   +4 more sources

Development of a Refined Model for a Rapid Compression and Expansion Machine with Pre-Chamber Applied to Study the Effects of Pre-Chamber Geometry and Hydrogen Enrichment on Combustion and Extinction of Methane/Air Flames

Energies
In this paper, experimental and numerical analyses are performed with a Rapid Compression and Expansion Machine (RCEM) equipped with a passive pre-chamber (PC) and fueled with premixed stoichiometric air/methane mixture to replicate engine-like ...
Fabio Bozza, Luigi Teodosio, Emanuele Ugliano, Ratnak Sok, Enrica Malfi, Jin Kusaka   +5 more
doaj   +2 more sources

A component-wise commissioning and validation framework for non-transit electronic portal imaging device patient-specific quality assurance [PDF]

Physics and Imaging in Radiation Oncology
Background and purpose: The American Association of Physicists in Medicine Task Group 307 (AAPM TG-307) recommends validation of electronic portal imaging device (EPID) patient-specific quality assurance (PSQA), including verification of measured and ...
Leyla Moghaddasi, Mario Perez, Maegan Stewart, Natasha Gabay, Stephanie Roderick, Regina Bromley, Ryan Brown, Jeremy Booth   +7 more
doaj   +2 more sources

Effects of Geometry on Passive Pre-Chamber Combustion Characteristics [PDF]

SAE Technical Paper Series, 2020
<div class="section abstract"><div class="htmlview paragraph">Towards a fundamental understanding of the ignition characteristics of pre-chamber (PC) combustion engines, computational fluid dynamics (CFD) simulations were conducted using CONVERGE. To assist the initial design of the KAUST pre-chamber engine experiments, the primary focus of
Mickael Silva, Sangeeth Sanal, Ponnya Hlaing, Emre Cenker, Bengt Johansson, Hong G. Im   +5 more
openaire   +2 more sources