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Published on Jan 1, 2020in Measurement2.79
Ahmed Mahfouz , Ahmed Emara (Helwan University)+ 3 AuthorsY.H.Elbashar (Egypt Nanotechnology Center)
Abstract The excitations of molecules due to reactions inside turbulent flames are very complicated to study. In this research, investigation on the intensity of the reaction rates inside and around flames of light diesel oil (LDO) and waste cooking oil (WCO) blends with light and heavy diesel fuel (HDO) using Hyper-spectral camera of wide range of measurements at various fuel/air equivalence ratios. The addition of waste cooking oil to both LDO will achieve fuel saving in which results of peak ...
Published on Dec 1, 2019in Combustion and Flame4.12
Qiang Wang11
Estimated H-index: 11
(Hefei University of Technology),
Longhua Hu24
Estimated H-index: 24
(USTC: University of Science and Technology of China)
+ 3 AuthorsOsamu Fujita18
Estimated H-index: 18
(Hokkaido University)
Abstract The blowout behavior of non-premixed turbulent coflow jet flames under microgravity environment was studied experimentally by utilizing a 3.6 s drop tower. Variations of flames leading to liftoff as well as blowout were examined by varying the coflow velocity and compared with those obtained under the normal gravity condition. A modeling work was conducted to incorporate the effects of the gravity (buoyancy) and coflow velocity on blowout behavior. Major findings include: (1) the flame ...
Published on Dec 1, 2019in Fuel5.13
Xiaoyan Li , Xudong Zhen3
Estimated H-index: 3
+ 2 AuthorsZhi Tian
Abstract Methanol, with a high octane index, is considered to be one of the most ideal fuels for high compression ratio engines. In this paper, the SAGE models combined with methanol chemical reaction kinetics (consisting of 46-species and 247-elementary reactions) are used to study knock combustion. Knock combustion is simulated in a high compression ratio SI methanol engine with different EGR rates. The results show that the introduction of EGR into the combustion chamber can reduce the knock ...
Jinhua Wang23
Estimated H-index: 23
(Xi'an Jiaotong University),
Qianqian Yu1
Estimated H-index: 1
(Xi'an Jiaotong University)
+ 2 AuthorsZuohua Huang50
Estimated H-index: 50
(Xi'an Jiaotong University)
Abstract A turbulence controllable premixed turbulent Bunsen burner was developed to study the separate effects of turbulence intensity and integral scale on the premixed turbulent flame. Circular and slot perforated plates with adjustable plate positions were designed to produce quasi-isotropic and uniform turbulence field containing scale-expanded vortices with normalized turbulence intensity ranging from 5% to 40%. The method to attain the controlled turbulence with multi-layer perforated pla...
Published on Dec 1, 2019in Energy5.54
Mahdi Najarnikoo (TMU: Tarbiat Modares University), Mohammad Zabetian Targhi (TMU: Tarbiat Modares University), Hadi Pasdarshahri8
Estimated H-index: 8
(TMU: Tarbiat Modares University)
Abstract In this paper, a cylindrical premixed perforated burner which is mostly used in condensing boilers is investigated by image processing methods. The burner is experimentally analyzed in its operating heating capacities (11.7–17.1 kW) and equivalence ratios (0.4–1.2). Flame properties were studied using digital images by CCD camera and color processing techniques. The method devised a procedure for finding a reliable relation between a digital image color and flame characteristics in the ...
Published on Dec 1, 2019in Energy5.54
I. Mohammadi (FUM: Ferdowsi University of Mashhad), Hossein Ajam12
Estimated H-index: 12
(FUM: Ferdowsi University of Mashhad)
Abstract In this paper, a symmetric two-dimensional numerical model for premixed methane-air combustion in a porous medium has been developed. For this purpose, multi-step mechanisms and variable porosity have been used and the effects of them on the entropy generation rate have been investigated. This model solves the continuity, Navier Stokes, the solid and gas energy, the chemical species transport equations and entropy generation rate equations by using the finite volume method and the press...
Published on 2019in Combustion and Flame4.12
Khushboo Pandey1
Estimated H-index: 1
(IISc: Indian Institute of Science),
Saptarshi Basu19
Estimated H-index: 19
(IISc: Indian Institute of Science)
Abstract Combustion characteristics of ethanol-water (EW) droplets laden with ceria nanoparticles are investigated. The present experimental study focuses on three facets of droplet combustion (i) burning time scale of droplets with and without NPs, (ii) pathways of secondary atomisation due to interface deformations and (iii) coupling of droplet shape deformations and flame heat release. A theoretical vaporisation timescale is advocated which considers natural convection-based evaporation, mass...
Published on 2019in Energy5.54
Guochang Wang1
Estimated H-index: 1
(PKU: Peking University),
J. Si (PKU: Peking University)+ 1 AuthorsJianguo Mi14
Estimated H-index: 14
(PKU: Peking University)
Abstract The present work is to investigate the MILD (moderate and intense low-oxygen dilution) combustion of a premixed methane jet in hot coflow against its conventional counterpart, i.e., a typical bluff-body flame, under identical inlet and boundary conditions. This paper demonstrates that the MILD combustion develops as a stable ‘flame’ lifting far downstream from the nozzle while the conventional flame evolves immediately behind the bluff body. More specifically, all chemical reactions are...
Published on Jul 1, 2019in Energy5.54
Subhasish Das (National Institute of Technology, Meghalaya), Biplab Kumar Debnath9
Estimated H-index: 9
(National Institute of Technology, Meghalaya)
+ 2 AuthorsT. Faravelli43
Estimated H-index: 43
(Polytechnic University of Milan)
Abstract The application of porous media in compression ignition engines has significant effects on its combustion behavior. In this work, a Computational Fluid Dynamics (CFD) analysis of combustion in diesel engine is performed for 100% load, and the effects of porous media addition in the combustion chamber are quantified. With a porosity of 66.7%, silicon carbide is applied as porous media of cylindrical shape in the modified piston bowl in the conventional engine. The combustion analysis out...
Published on Oct 1, 2019in Fuel5.13
Tiezheng Zhao , Xiao Liu4
Estimated H-index: 4
(HEU: Harbin Engineering University)
+ 1 AuthorsHongtao Zheng2
Estimated H-index: 2
Abstract Investigations of mixing process, combustion and emission characteristics have been performed in a double-cone premixed burner under various mixing distances. The complex flow field and flame structure are accurately captured by the simulation model. The modified unmixedness coefficient, flame index, NO, CO emissions have been calculated and analyzed in detail. Numerical results show that the dimensionless mixing distance has a significant impact on the fuel mixing effect and then affec...
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