Analysis of Hydrocarbon Mixture Performance of a Dual-Channel Swirl Engine
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https://doi.org/10.1007/s11630-020-1372-5
Article ID: 1003-2169(2020)00-0000-00
Analysis of Hydrocarbon Mixture Performance of a Dual-Channel Swirl Engine YUAN Wenhua1*,3, HUANG Qilin1,3, FU Jun1*,3, LIAO Jingjing1,3, LI Yu2, HE Yong1,3, ZHANG Zengfeng1,3, MA Yi1,3 1. School of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422004, China 2. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China 3. Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing, Shaoyang University, Shaoyang 422000, China © Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract: In order to understand and improve the oil and gas mixing performance of a dual-channel vortex chamber diesel engine, the BH175F dual-channel vortex chamber combustion system was used as the research foundation, and the oil-gas mixture process of the combustion system was numerically analyzed. By analyzing the cylinder temperature, cylinder pressure, mixing process and combustion process of the combustion system, the mixture performance of the combustion system was studied. Results indicated that: The mixture of the compression Top Dead Center (TDC) started to enter the main combustion chamber through the start-up hole; when the piston reached 4° After Top Dead Center (ATDC), the mixture started to enter the main combustion chamber through the connecting channels A and B, and the high-concentration mixture entered the main combustion from the start-up hole; when the piston continued running down to 20° and 25° ATDC, it could be seen that the main combustion chamber mixture was already relatively uniform; besides, when the equivalence ratio was between 0.8 and 1, the air-fuel mixture was unevenly distributed in the main combustion chamber. It provides guidance for further improvement of the combustion system.
Keywords: gas mixing performance, dual-channel, vortex chamber, combustion system
1. Introduction At present, a class of diesel engines with large production capacity and wide use in China is the vortex chamber diesel engine, especially the small and medium power diesel engine [1, 2]. The vortex chamber air-cooled diesel engine still had certain defects, such as high heat load, relatively low charge coefficient, and low
average effective pressure (about 5%) [3, 4]. In order to improve the performance of the vortex chamber diesel engine, the research group proposed a dual-channel vortex chamber combustion system based on the BF175F diesel engine. Experiments showed that the proposed scheme effectively improved engine performance. With the introduction of the fourth non-road national emission regulation, it is particularly important to further improve
Article type: Contributed by the 1st International Conference of Thermal Fluid Dynamics and Control (August 02–06, 2019, in Christchurch 8140 New Zealand) for publication in Journal of Thermal Science. Received: Aug 30, 2019
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