Effect of fractal-grid generated turbulence on the structure of premixed flames for low pollutant emissions in combustion

Manshoor, Bukhari and Alimin, Ahmad Jain and Khalid , Amir and Mohd Ali, Mas Fazwi and Mat Isa, Norassikin and Zaman, Izzudin and Sies, Mohamad Farid (2017) Effect of fractal-grid generated turbulence on the structure of premixed flames for low pollutant emissions in combustion. In: Recent Research and Developments in Centre for Energy and Industrial Environment Studies. Series 1 . Penerbit UTHM, pp. 13-22. ISBN 9789670764955

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Abstract

Turbulent premixed flames are of great importance for technical combustion systems as they can produce high power densities and low pollutant emissions at the same time. Standard turbulence generating grids, such as perforated plates are normally used for non swirl stabilized flames to generate a certain level of turbulence. They are usually placed at distances of several mesh sizes upstream of the flame to ensure a well developed velocity field. Although normal grids can generated high levels of turbulence near to the grid, the turbulence decays quickly further downstream of the grid, and as a consequence, the resulting flames are exposed to a rather low turbulence. As an innovative thinking, the authors expect that the fractal shaped perforated plate have a significant effect on the turbulent intensity due to their edge self similar shape which enhances the mixing flow properties. The turbulence has different scales, a progressive scaling from large to small scale, which is structured in a space filling fractal behaviour. This was the motivation for some recent experimental and numerical investigations to use a fractal-shaped grid to generate turbulence. Most of the researches that have been dealt with the fractal theory used the fractal concept to calculate the topology of complicated geometry of an interface surface as in combustion premixed flames.

Item Type:Book Section
Subjects:T Technology > TJ Mechanical engineering and machinery > TJ751-805 Miscellaneous motors and engines
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Energy and Thermofluid Engineering
ID Code:11074
Deposited By:Mr. Mohammad Shaifulrip Ithnin
Deposited On:13 May 2019 09:08
Last Modified:13 May 2019 09:08

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