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Title: Numerical simulation and sensitivity analysis of detailed soot particle size distribution in laminar premixed ethylene flames

Abstract

In this paper, the prediction of a soot model [J. Appel, H. Bockhorn, M. Frenklach, Combust. Flame 121 (2000) 122-136] is compared to a recently published set of highly detailed soot particle size distributions [B. Zhao, Z. Yang, Z. Li, M.V. Johnston, H. Wang, Proc. Combust. Inst. 30 (2005)]. A stochastic approach is used to obtain soot particle size distributions (PSDs). The key features of the measured and simulated particle size distributions are identified and used as a simple way of comparing PSDs. The sensitivity of the soot PSDs to the parameters defining parts of the soot model, such as soot inception, particle and PAH collision efficiency and enhancement, and surface activity is investigated. Incepting soot particle size is found to have a very significant effect on the small-size end of the PSDs, especially the position of the trough for a bimodal soot PSDs. A new model for the decay in the surface activity is proposed in which the activity of the soot particle depends only on the history of that particle and the local temperature in the flame. This is a first attempt to use local flame variables to define the surface aging which has major impact on themore » prediction of the large-size end of the PSDs. Using these modifications to the soot model it is possible to improve the agreement between some of the points of interest in the simulated and measured PSDs. The paper achieves the task to help advance the soot models to predict soot PSD in addition to soot volume fraction and number density, which has been the focus of the literature. (author)« less

Authors:
; ;  [1];  [2]
  1. Department of Chemical Engineering, University of Cambridge, Pembroke Street, Cambridge CB2 3RA (United Kingdom)
  2. Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089-1453 (United States)
Publication Date:
OSTI Identifier:
20727297
Resource Type:
Journal Article
Journal Name:
Combustion and Flame
Additional Journal Information:
Journal Volume: 145; Journal Issue: 1-2; Other Information: Elsevier Ltd. All rights reserved; Journal ID: ISSN 0010-2180
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ETHYLENE; FLAMES; SOOT; PARTICLE SIZE; SENSITIVITY ANALYSIS; MATHEMATICAL MODELS

Citation Formats

Singh, Jasdeep, Patterson, Robert I.A., Kraft, Markus, and Wang, Hai. Numerical simulation and sensitivity analysis of detailed soot particle size distribution in laminar premixed ethylene flames. United States: N. p., 2006. Web. doi:10.1016/j.combustflame.2005.11.003.
Singh, Jasdeep, Patterson, Robert I.A., Kraft, Markus, & Wang, Hai. Numerical simulation and sensitivity analysis of detailed soot particle size distribution in laminar premixed ethylene flames. United States. https://doi.org/10.1016/j.combustflame.2005.11.003
Singh, Jasdeep, Patterson, Robert I.A., Kraft, Markus, and Wang, Hai. 2006. "Numerical simulation and sensitivity analysis of detailed soot particle size distribution in laminar premixed ethylene flames". United States. https://doi.org/10.1016/j.combustflame.2005.11.003.
@article{osti_20727297,
title = {Numerical simulation and sensitivity analysis of detailed soot particle size distribution in laminar premixed ethylene flames},
author = {Singh, Jasdeep and Patterson, Robert I.A. and Kraft, Markus and Wang, Hai},
abstractNote = {In this paper, the prediction of a soot model [J. Appel, H. Bockhorn, M. Frenklach, Combust. Flame 121 (2000) 122-136] is compared to a recently published set of highly detailed soot particle size distributions [B. Zhao, Z. Yang, Z. Li, M.V. Johnston, H. Wang, Proc. Combust. Inst. 30 (2005)]. A stochastic approach is used to obtain soot particle size distributions (PSDs). The key features of the measured and simulated particle size distributions are identified and used as a simple way of comparing PSDs. The sensitivity of the soot PSDs to the parameters defining parts of the soot model, such as soot inception, particle and PAH collision efficiency and enhancement, and surface activity is investigated. Incepting soot particle size is found to have a very significant effect on the small-size end of the PSDs, especially the position of the trough for a bimodal soot PSDs. A new model for the decay in the surface activity is proposed in which the activity of the soot particle depends only on the history of that particle and the local temperature in the flame. This is a first attempt to use local flame variables to define the surface aging which has major impact on the prediction of the large-size end of the PSDs. Using these modifications to the soot model it is possible to improve the agreement between some of the points of interest in the simulated and measured PSDs. The paper achieves the task to help advance the soot models to predict soot PSD in addition to soot volume fraction and number density, which has been the focus of the literature. (author)},
doi = {10.1016/j.combustflame.2005.11.003},
url = {https://www.osti.gov/biblio/20727297}, journal = {Combustion and Flame},
issn = {0010-2180},
number = 1-2,
volume = 145,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2006},
month = {Sat Apr 15 00:00:00 EDT 2006}
}