Steady-State Experiment and Simulation of Intake Ports in a Four-Valve Direct Injection Diesel Engine
Publish place: Journal of Applied Fluid Mechanics، Vol: 11، Issue: 1
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAFM-11-1_002
تاریخ نمایه سازی: 1 اردیبهشت 1397
Abstract:
In order to analyze intake port flow characteristics of a four-valve direct injection (DI) diesel engine, steadystate flow bench experiments and numerical simulations method were coupled to investigate the following four combined intake ports: (1) helical port (left) and tangential port (right); (2) tangential port (left) and helical port (right); (3) helical port (left) port and helical (right); and (4) tangential port (left) and tangential (right) port. Results show that the simulation of port flow coefficients matches experimental findings very well, and the port coefficients of the above four combinations do not vary much, but their swirl ratios are very different. Specifically, when the valve lift is the maximum, the swirl ratio of the combination of helical and tangential is the greatest among the four combinations, and the swirl ratio of tangential and tangential is the minimum. And the3D fluid simulation method and steady-state experiment are important means to investigate the flow characteristics of the combined intake ports.
Keywords:
Four-valve DI diesel engine , Flow characteristics , Combined intake ports , Steady-state experiment , Simulation
Authors
D. W Jia
Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming ۶۵۰۵۰۰, China
X. W Deng
Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming ۶۵۰۵۰۰, China
J. L Lei
Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming ۶۵۰۵۰۰, China