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A model for predicting turbulent burning velocity by using Karlovitz number and Markstein number under EGR conditions Waseda University
- Format:
- Book
- Conference/Event
- Author/Creator:
- Yoshimura, Kei, author.
- Conference Name:
- SAE Powertrains, Fuels & Lubricants Digital Summit (2021-09-28 : Live Online, Pennsylvania, United States)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2021
- Summary:
- The purpose of this paper is to build up a prediction model for turbulent burning velocity which is valid under various operating conditions and engine specifications. This paper presents the relationship between turbulent burning velocity, Karlovitz number and Markstein number for building up the prediction model. The turbulent burning velocity was measured using a single-cylinder gasoline engine, which has an external Exhaust Gas Recirculation (EGR) system. In the experiment, various engine operating parameters, e.g. engine loads and EGR rates, and various engine specifications, id est different types of intake ports were tested. Karlovitz number was calculated using Three-Dimensional Computational Fluid Dynamics (3D-CFD) and detailed chemical kinetics simulation with premixed laminar flame model. Markstein number was also calculated using detailed chemical kinetics simulation with opposed-flow flame reactor model. The conditions of these simulations were set based on the experimental result. The experimental and calculation results show that the predicting accuracy for turbulent burning velocity improves by using Karlovitz number and Markstein number in highly diluted conditions. It is hence important to take the effect of flame stretch rate and the sensitivity of local burning velocity to flame stretch into account for the prediction
- Notes:
- Vendor supplied data
- Publisher Number:
- 2021-01-1146
- Access Restriction:
- Restricted for use by site license
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