Results 61 to 70 of about 611 (182)

Imaging gas in a combustion engine with high‐energy X‐ray Compton scattering

Journal of Synchrotron Radiation, Volume 33, Issue 3, Page 788-793, May 2026.
Compton‐scattering imaging has been applied to a combustion engine under operation for the first time. With a time‐resolved technique, a crank‐angle dependency of Compton‐scattered X‐ray intensity is obtained at different positions in a combustion chamber.We have developed a time‐resolved Compton‐scattering imaging technique for visualizing gas ...
Yuki Mizuno, Hiroaki Suzuki, Naruki Tsuji, Takuyo Oguchi, Go Matsubara, Hiroyuki Yamase, Yoshiharu Sakurai   +6 more
wiley   +1 more source

Upcycling of Disposable Face Masks into Water‐Resistant and Flame Retardant Foams

Advanced Functional Materials, Volume 36, Issue 25, 26 March 2026.
Disposable mask waste is upcycled into lightweight polypropylene‐based foams with tunable porosity and composite architectures reinforced by ear‐loop fibers. The sustainable solvent‐based process enables upcycling rates of 91% and solvent recovery of >90%.
Jingjing Pan, Erlantz Lizundia, Hao Jia, Lennart Bergström   +3 more
wiley   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, Volume 7, Issue 3, March 2026.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

DNS Investigation on Autoignition and Flame Propagation in HCCI Combustion

Journal of Fluid Science and Technology, 2011
2-dimensional direct numerical simulation (DNS) of autoignition and flame propagation of turbulent premixed mixture has been conducted to investigate the turbulent combustion mechanism in homogeneous charge compression ignition (HCCI) engines.
Hiroaki FUKUMOTO, Takehiko SEO, Masayasu SHIMURA, Naoya FUKUSHIMA, Mamoru TANAHASHI, Toshio MIYAUCHI   +5 more
doaj   +1 more source

Computational Analysis of Spray Angle Effects on Combustion and Emissions in Methane‐Diesel Dual‐Fuel Engine

Energy Science &Engineering, Volume 14, Issue 3, Page 1100-1112, March 2026.
This study concluded that wider spray angles produce wall impingement and greater unburned hydrocarbons in methane‐diesel dual‐fuel engines, whereas 110° balances efficiency and emissions. ABSTRACT A diesel methane dual fuel engine appears as a potential means for lowering emissions while retaining useful thermal efficiency.
Abdullah Al Rifat, Md. Arafat Rahman, Md. Mizanur Rahman, Tafsirul Hassan, Md Nazmul Haque   +4 more
wiley   +1 more source

Numerical investigation on the combustion characteristics of turbulent premixed ammonia/air flames stabilized by a swirl burner

Journal of Fluid Science and Technology, 2016
The present study is dedicated to understand the combustion characteristics of turbulent premixed swirl flames for ammonia (NH3)/air mixture in gas turbine combustors by a numerical investigation.
Kapuruge Don Kunkuma Amila SOMARATHNE, Akihiro HAYAKAWA, Hideaki KOBAYASHI   +2 more
doaj   +1 more source

Simulation of Nonpremixed Jet Flame Using Flamelet‐Generated Manifold

Safety Science and Technology, Volume 1, Issue 1, March 2026.
A flamelet‐generated manifold (FGM) approach is proposed and validated by nonpremixed methane jet flames. The effects of radiation and buoyancy were critically examined, and nonpremixed and premixed tabulation methods were compared, revealing the importance of radiation, buoyancy, and appropriate flamelet prototype in accurate FGM modeling.
Yujie Lin, Weijie Zhang, Zhi Zhang, Ziqi Wang, Peng Cai, Yi Liu, Anfeng Yu   +6 more
wiley   +1 more source

Flow Field of Turbulent Premixed Combustion in a Cyclone-Jet Combustor

Journal of Thermal Science and Technology, 2007
The flow field in highly turbulent premixed combustion has been examined, using a cyclone-jet combustor. The shear-strain rate is obtained by PIV system. Results show that, in combustion field, mean axial velocity does not decay along center axis and RMS
Kazuhiro YAMAMOTO, Satoshi INOUE, Hiroshi YAMASHITA, Daisuke SHIMOKURI, Satoru ISHIZUKA   +4 more
doaj   +1 more source

Large eddy simulation of spray combustion in a lean direct injection combustor using a novel subgrid-scale stress model

Applications in Energy and Combustion Science
Large eddy simulation (LES) is an important tool for studying turbulent spray combustion and developing next-generation combustion devices. In LES, the subgrid-scale (SGS) stress needs to be modeled with the closure models.
Yicun Wang, Kun Luo, Hualin Xiao, Tai Jin, Changxiao Shao, Jianren Fan   +5 more
doaj   +1 more source

Numerical Implementation and validation of turbulent premixed combustion model for lean mixtures

MATEC Web of Conferences, 2018
The present paper discusses the numerical investigation of turbulent premixed flames under lean conditions. Lean premixed combustion, a low NOx emission technique but are prone to instabilities, extinction and blow out.
Muppala Siva, Madhav Rao Vendra C.
doaj   +1 more source