The structural parameters of combustion chamber have great impacts on the process of air–fuel mixing, combustion, and emissions of diesel engine. The dynamic characteristics and emission performances could be improved by means of optimizing the parameters of the combustion chamber. In this paper, the key structure of a diesel engine combustion chamber is parameterized, and the influence of individual structural parameter on dynamic characteristics and emissions of the engine is simulated and analyzed by computational fluid dynamics (CFD) software avl-fire. The results show that under constant compression ratio, the in-cylinder peak pressure decreases with increasing inclination angle of the combustion chamber (α), while the height (Tm) and bowl radius (R) have little influence on the in-cylinder peak pressure. With increasing α, NO emissions decrease, and soot emissions first increase and then decrease. With increasing R, both NO and soot emissions decrease first and then increase. Therefore, the combustion chamber parameters could be optimized by comprehensive consideration of cylinder pressure, NO and soot emissions.
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July 2017
Research-Article
Influence of Key Structural Parameters of Combustion Chamber on the Performance of Diesel Engine
Xinhai Li,
Xinhai Li
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
Shandong University,
Jinan 250061, China
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Yong Cheng,
Yong Cheng
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
e-mail: cysgd@sdu.edu.cn
Shandong University,
Jinan 250061, China
e-mail: cysgd@sdu.edu.cn
Search for other works by this author on:
Shaobo Ji,
Shaobo Ji
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
Shandong University,
Jinan 250061, China
Search for other works by this author on:
Xin Lan
Xin Lan
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
Shandong University,
Jinan 250061, China
Search for other works by this author on:
Xinhai Li
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
Shandong University,
Jinan 250061, China
Yong Cheng
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
e-mail: cysgd@sdu.edu.cn
Shandong University,
Jinan 250061, China
e-mail: cysgd@sdu.edu.cn
Shaobo Ji
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
Shandong University,
Jinan 250061, China
Xin Lan
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
Shandong University,
Jinan 250061, China
1Corresponding author.
Contributed by the Internal Combustion Engine Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received October 8, 2016; final manuscript received February 12, 2017; published online March 8, 2017. Assoc. Editor: Stephen A. Ciatti.
J. Energy Resour. Technol. Jul 2017, 139(4): 042203 (7 pages)
Published Online: March 8, 2017
Article history
Received:
October 8, 2016
Revised:
February 12, 2017
Citation
Li, X., Cheng, Y., Ji, S., and Lan, X. (March 8, 2017). "Influence of Key Structural Parameters of Combustion Chamber on the Performance of Diesel Engine." ASME. J. Energy Resour. Technol. July 2017; 139(4): 042203. https://doi.org/10.1115/1.4036049
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