Analysis of Auto-Ignition Induced in a Constant Volume Vessel by Local Gas Temperature Measurement and Visualization(Measurement, Temperature)
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概要
- 論文の詳細を見る
Knocking combustion in SI engines is regarded as an auto-ignition of unburned gas, and it has been widely examined by using rapid compression machines (RCM) or test engines. Recent researches point out the importance of the low temperature reaction and negative temperature coefficient. To investigate the effect, measurements of instantaneous local gas temperature, visualization and pressure were conducted. Measurements using real engines are too difficult to analyze while those with RCM have not been made with flame propagation. Therefore, the authors aimed to make measurements under knock conditions where propagating flame exists during the induction time for auto-ignition using a constant volume vessel. Adopting the two-wire thermocouple method enables us to measure the local temperature until the moment when the flame front passes by without any interference. High-speed images inside the unburned region were also recorded simultaneously using an endoscope. As a result, it was found that when knock occurs, the ignition time seems slightly early compared to results without knock. Interference of hot spots may cause a higher gas temperature region and leading to knock due to a larger heat release by auto-ignition than by flame propagation when the initiation time of auto-ignition was accelerated for some reasons.
- 一般社団法人日本機械学会の論文
- 2004-08-02
著者
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ENOMOTO Yoshiteru
Musashi Institute of Technology
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KOBAYASHI Shigemi
New Energy and Industrial Technology Development Organization
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ENOMOTO Yoshiteru
Department of Mechanical System Engineering, Musashi Institute of Technology
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Enomoto Yoshiteru
Department Of Mechanical Systems Engineering Musashi Institute Of Technology
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Moriyoshi Yasuo
Department Of Electronics And Mechanical Engineering Chiba University
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KOBAYASHI Shigemi
Graduate School of Science and Technology, Chiba University
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