Abstract
Very fast visualization of fuel injection and spray impingement on the wall, the laser ignition process, and auto-ignition of the end-gas region due to flame propagation during the engine knock cycle was demonstrated using an ultra-high-speed camera for a detailed understanding of the combustion process inside an internal combustion (IC) engine. The combustion process of an IC engine is complex, involving several thermal fluid phenomena. The high-speed video camera was an essential tool for visualizing and recording these high-speed phenomena. When more magnified images are needed, the ultra-high-speed camera and a long-distance microscope with a Barlow lens were used. Here, high-speed visualization techniques were shown to understand the combustion process inside an IC engine.
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421713_1_En_12_MOESM1_ESM.mp4
Time series of high-speed direct images and related in-cylinder pressure histories for a normal engine cycle, a camera speed 60,000 fps (MP4 160 kb)
421713_1_En_12_MOESM2_ESM.mp4
Time series of high-speed direct images and related in-cylinder pressure histories for a knocking engine cycle, a camera speed 60,000 fps (MP4 127 kb)
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Kawahara, N. (2018). Visualization of Combustion Processes of Internal Combustion Engines. In: Tsuji, K. (eds) The Micro-World Observed by Ultra High-Speed Cameras. Springer, Cham. https://doi.org/10.1007/978-3-319-61491-5_12
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DOI: https://doi.org/10.1007/978-3-319-61491-5_12
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