Numerical simulation of tribosystems of the high-force diesel engine taking into account the rheological characteristics of a lubricant

Diesel engine has some advantages that thermal efficiency is high and control response is fast. On the other hand, more particulate matter (PM) and nitrogen oxide (NOx) are contained in the exhaust gas of diesel engine. Premixed charge compression ignition (PCCI) combustion is proposed to reduce the PM and NOx. In the lean range of equivalent ratio, unburned fuel is left and in the rich range, PM and soot are generated. For the practical use of PCCI combustion, mixing fuel and air well is important under the low equivalent ratio of injection. In this study, the mixing characteristics of fuel and air in a cylinder were numerically evaluated. A numerical simulation was performed with general-purpose simulator. The fuel has been injected into the vertical direction of cylinder and injection angle has been defined as 0 degree. In order to express the collusion, impingement on the wall model, that defines behavior of a droplet impinged on the wall with the Weber number of a droplet, was applied. By the injection timing, standard deviation of local equivalent ratio at Top Dead Center (TDC) was plotted. In this study, Frequency of mixing in each cell statistically was observed to evaluate the fuel-air mixing degree. The authors have taken notice of the condition which can be reduced the amount of scatter in the distribution of local equivalent ratio.

Download Full-text

3D Numerical Simulation of Cooling-water Cavitation Flow of Cylinder Liner for Diesel Engine

Journal of Mechanical Engineering ◽

10.3901/jme.2011.22.167 ◽

2011 ◽

Vol 47 (22) ◽

pp. 167 ◽

Cited By ~ 3

Author(s):

Dongsheng XIA

Keyword(s):

Numerical Simulation ◽

Diesel Engine ◽

Cooling Water ◽

Cylinder Liner ◽

Cavitation Flow ◽

3D Numerical Simulation

Download Full-text

Numerical Simulation of Temperature Field in Laser Phase-Transformation Hardening of Highly-Enhanced Diesel Engine Valve Seats

Laser & Optoelectronics Progress ◽

10.3788/lop55.111601 ◽

2018 ◽

Vol 55 (11) ◽

pp. 111601 ◽

Cited By ~ 1

Author(s):

谭雯丹 Tan Wendan ◽

庞铭 Pang Ming ◽

江国业 Jiang Guoye ◽

付威 Fu Wei ◽

张啸寒 Zhang Xiaohan ◽

...

Keyword(s):

Numerical Simulation ◽

Phase Transformation ◽

Temperature Field ◽

Diesel Engine ◽

Engine Valve

Download Full-text

Characterization of the Nonroad Modified Diesel Engine Using a Novel Entropy-VIKOR Approach: Experimental Investigation and Numerical Simulation

Journal of Energy Resources Technology ◽

10.1115/1.4042717 ◽

2019 ◽

Vol 141 (8) ◽

Cited By ~ 8

Author(s):

Pushpendra Kumar Sharma ◽

Dilip Sharma ◽

Shyam Lal Soni ◽

Amit Jhalani

Keyword(s):

Numerical Simulation ◽

Diesel Engine ◽

Engine Performance ◽

Injection Pressure ◽

Multicriteria Decision Making ◽

Operating Parameters ◽

Injection Timing ◽

Oxides Of Nitrogen ◽

Compression Ignition Engine ◽

Continuous Increase

Excessive use of diesel engines and continuous increase in environmental pollution has drawn the attention of researchers in the area of the compression ignition engine. In this research article, an innovative investigation of the nonroad modified diesel engine is reported with the effective use of the hybrid Entropy-VIKOR approach. Hence, it becomes necessary to prioritize and optimize the performance defining criteria, which provides higher BTE along with lower emission simultaneously. The engine load, injection timing (Inj Tim), injection pressure (Inj Pre), and compression ratio (Com R) were selected as engine operating parameters for experimentation at the constant speed of 1500 rpm engine. The effect on engine performance parameters (BTE and BSEC) and emission (carbon monoxide (CO), total oxide of carbon (TOC), oxides of nitrogen (NOx), hydrocarbon (HC), and smoke) was studied experimentally. The optimum results were observed at load 10.32 kg, Inj Tim 20 deg btdc, Inj Pre 210 bar, and Com R 21:1 at which highest BTE of 22.24% and lowest BSEC of 16,188.5 kJ/kWh were obtained. Hybrid entropy-VIKOR approach was applied to establish the optimum ranking of the nonroad modified diesel engine. The experimental results and numerical simulation show that optimizing the engine operating parameters using the entropy-VIKOR multicriteria decision-making (MCDM) technique is applicable.

Download Full-text