Hu, Z, Somers, BLMT, Cracknell, RF et al. (1 more author) (2016) Investigation of the Livengood-Wu integral for modelling autoignition in a high-pressure bomb. Combustion Theory and Modelling, 20 (1). pp. 77-98. ISSN 1364-7830
Abstract
The reaction progress variable, which is widely used in premixed and diffusion combustion studies, comprises a set of pre-selected intermediate species to denote reaction progress. Progress towards autoignition can also be traced by the Livengood–Wu (LW) integral. Autoignition occurs when the LW integral attains a value of unity. This concept is further explored by applying it to an inhomogeneous mixture scenario, to determine the time and place of autoignition occurrence. A semidetailed mechanism (137 species and 633 reactions) for n-heptane/iso-octane/toluene is used in this study. Two numerical schemes based on the LW integral are proposed and incorporated into a computational fluid dynamics platform, to model autoignition in a 3D configuration, when a spray is injected into a constant volume bomb under diesel engine conditions. Tabulated chemistry, a traditional method of modelling autoignition using information from pre-calculated igniting diffusion flames, is also used for comparison purposes. The associated predicted pressure profiles are compared with experimental measurements.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Keywords: | autoigntive speed; inhomogeneous autoignition; flamelet generated manifolds; Livengood--Wu |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Aug 2016 13:56 |
Last Modified: | 03 Nov 2016 03:53 |
Published Version: | http://dx.doi.org/10.1080/13647830.2015.1118159 |
Status: | Published |
Publisher: | Taylor & Francis |
Identification Number: | 10.1080/13647830.2015.1118159 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:102124 |