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research-article

Experimental study of laminar burning speed for premixed biomass/air flame

[+] Author and Article Information
Ziwei Bai

Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China; Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA
baiziwei0427@sina.com

Ziyu Wang

Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA
wang.ziyu2@husky.neu.edu

Guangying Yu

Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA
yu.g@husky.neu.edu

Yongping Yang

Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China
316330392@qq.com

Hameed Metghalchi

Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA
metghalchi@coe.neu.edu

1Corresponding author.

ASME doi:10.1115/1.4041412 History: Received August 21, 2018; Revised August 31, 2018

Abstract

Biomass has been considered as a valuable alternative fuel recently. A fundamental property of biomass/air flame, laminar burning speed, is measured in this research. Experiments have been made in a cylindrical combustion vessel with two end windows. Central ignition has been used to start the combustion process. A high-speed CMOS camera capable of taking pictures of 40,000 frames per second has been used to study morphology of flame front. Flames are initially smooth and as pressure and flame radius increase cracks and cells appear on the flame surface. In this manuscript experimental results have only been reported for smooth flames. A multi-shell thermodynamic model to measure laminar burning speed of biomass/air mixture with varying CO2 concentrations (0%-60%), based on the pressure rise data collected from a cylindrical chamber during combustion, has been developed in this paper. Power law correlations, to predict burning speed of biomass/air mixtures, based on the measured burning speeds, has been developed for range of temperatures of 300-661 K, pressures of 0.5-6.9 atmospheres, equivalence ratios of 0.8-1.2 and CO2 concentration 0%-60%. Moreover, the measured laminar burning speeds have been compared with simulation results using a one-dimensional steady state laminar premixed flame program with GRI-Mech 3.0 mechanism and other available data from literatures. Comparison with existing data has been excellent.

Copyright (c) 2018 by ASME
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