Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/128969
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Type: | Journal article |
Title: | Numerical and experimental investigation of turbulent n-heptane jet-in-hot-coflow flames |
Author: | Li, Z. Evans, M.J. Ye, J. Medwell, P.R. Parente, A. |
Citation: | Fuel: the science and technology of fuel and energy, 2021; 283:118748-1-118748-13 |
Publisher: | Elsevier |
Issue Date: | 2021 |
ISSN: | 0016-2361 1873-7153 |
Statement of Responsibility: | Zhiyi Li, Michael J. Evans, Jingjing Ye, Paul R. Medwell, Alessandro Parente |
Abstract: | A turbulent n-heptane jet flame in a jet-in-hot-coflow burner is numerically and experimentally investigated, revealing distinct features of this fuel in a jet-in-hot-coflow burner. The RANS k-turbulence model is adopted in combination with a dynamic partially-stirred reactor (PaSR) combustion model. The simulation results are used to support newly-obtained experimental measurements of mean temperature, OH number density and nor-malised CH2O-PLIF signal values at several axial locations. The simulations capture the transitional phenomenon observed experimentally for the low coflow oxygen concentration case, which is determined to be due to the two chemical pathways which exist for the n-heptane fuel. The predicted flame weak-to-strong transition heights based on the streamwise (axial) gradient of OH number density show non-monotonic behaviour. Furthermore, an investigation on negative heat release rate region shows that the absolute value of negative heat release rate increases with reduced coflow oxygen content, in contrast to the suppression phenomenon seen in laminar opposed-flow flames. |
Keywords: | n-heptane; turbulent flames; partially-stirred reactor (PaSR); jet-in-hot-coflow (JHC) burner; MILD combustion; URANS simulation |
Rights: | © 2020 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.fuel.2020.118748 |
Grant ID: | http://purl.org/au-research/grants/arc/DP170101013 http://purl.org/au-research/grants/arc/FT190100552 |
Published version: | http://dx.doi.org/10.1016/j.fuel.2020.118748 |
Appears in Collections: | Aurora harvest 4 Mechanical Engineering publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_128969.pdf | Accepted version | 4.51 MB | Adobe PDF | View/Open |
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