A fast pyrolysis biofuel, mainly consisting to 98% of ethanol, ethyl acetate, diethyl ether, acetone and 2-butanone with mass ratios of 9:6:2:1:1, was catalytically produced from rice husk. A preliminary engine test demonstrated this biofuel has the possibility of being a gasoline blending stock. However, its fundamental burning features are not fully understood. This work presents the experimental investigations of the spherical propagating flame of a surrogate fuel representing the biofuel in a constant volume combustion chamber (CVCC). Tests were conducted at initial pressures of 0.1–0.4 MPa, initial temperatures of 358–418 K, and equivalence ratios of 0.7–1.4. Employing the constant volume method (CVM) allows determining laminar burning speeds (Su) of this surrogate at conditions far beyond the initial conditions (0.1–0.8 MPa, 358–490 K). Power law fitting correlations between Su and pressure were obtained via the constant volume method (CVM). Cellularity appears when pressure or temperature is high, and cellular burning speed was calculated by CVM as well. Su determined via the constant pressure method (CPM) were compared with those from the CVM. Discrepancies between the results from the CVM and the CPM are within 15%, except at the conditions where flame cellularity appeared. Additionally, an explicit correlation of Su was obtained from the experimental results.
Bibliographical noteNOTICE: this is the author’s version of a work that was accepted for publication in Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy, 190, (2020)] DOI: 10.1016/j.energy.2019.116315
© 22007, Elsevier. Licensed under the Creative Commons Attribution-NonCommercialNoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
FunderNational Natural Science Foundation of China (NO. 91741203 and 51336008 ), the Public Beneficial Technology Application Research Project of Science Technology Department of Zhejiang Province (NO. 2016C31102 and 2016C31112 ), the Fundamental Research Funds for the Central Universities of China (NO. 2013QNA4017 ), and the Hangzhou Science Committee (NO. 20162013A06 ) of China.
- Cellular flame speed
- Constant-volume method
- Laminar burning speed
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering