Numerical Simulation on Forced Swirl Combustion Chamber in Diesel Engine

2011 ◽  
Author(s):  
Shang Yong ◽  
Liu Fu-shui ◽  
Li Xiang-rong
Keyword(s):  
Numerical Simulation ◽  
Diesel Engine ◽  
Combustion Chamber ◽  
Swirl Combustion

Research on Parametric Design Method of Combustion Chamber on Diesel Engine

2011 ◽  
Vol 383-390 ◽  
pp. 1431-1440
Author(s):  
Yong Shang ◽  
Fu Shui Liu ◽  
Xiang Rong Li ◽  
Jing Wu
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Calculation Result ◽  
Parametric Design ◽  
Design Method ◽  
Geometrical Parameters ◽  
Combustion Chambers ◽  
Heat Efficiency ◽  
Swirl Combustion ◽  
Combustion Duration

One method of parametric design on combustion chamber is used in this paper. Several independent geometrical parameters of ω type and double swirl combustion chamber are brought forward. Different series of ω type and double swirl combustion chambers have been designed by using this method. The effect of the independent geometrical parameters on the performance of diesel engine has been studied by using CFD code AVL FIRE. According to this method of parametric design and calculation result, two pistons with ω type and double swirl combustion chamber has been designed with the target of the highest indicated heat efficiency. The test result shows that, contrasting with ω type chamber, BSFC and main combustion duration of double swirl combustion chamber is lower by 7.5 and 6.9 percent respectively, while indicated heat efficiency is 7.1 percent higher. And the calculation result has coherence with the experiment. It is proved that the method of parametric design on combustion chamber can satisfy the requirement of designing. At the same time, this method can be extended to design other combustion chambers.

scholarly journals Selecting a k-ε turbulence model for investigating n-decane combustion in a diesel engine combustion chamber

2019 ◽  
Vol 7 (2) ◽  
pp. 80-87
Author(s):  
Andrii Avramenko
Keyword(s):  
Numerical Simulation ◽  
Diesel Engine ◽  
Combustion Chamber ◽  
Turbulent Flows ◽  
Turbulence Model ◽  
Turbulence Models ◽  
Toxic Substances ◽  
Engine Combustion ◽  
Experimental Findings ◽  
The Impact

The results of a comparative numerical simulation of combustion and formation of toxic substances in a diesel engine combustion chamber are given. Experimental findings were used to identify the mathematical models. The impact of the standard, RNG and realizable k-ε turbulence models on the accuracy of numerical simulation of combustion and the formation of toxic substances was studied. The realizable k-ε turbulence model was shown to provide a closer agreement of computational and experimental data during simulation of the diesel engine process when turbulent flows are described.

scholarly journals Modified quasi-stationary method for studying changes in transition temperatures of diesel engine pistons coated with heat-shielding materials

2020 ◽  
Vol 24 (5) ◽  
pp. 954-965
Author(s):  
Mahmood Al-Bdeiri ◽  
◽  
Vladimir Krasilnikov ◽  
Sergey Sergeev ◽  
◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Diesel Engine ◽  
Heat Flow ◽  
Combustion Chamber ◽  
Oxide Coating ◽  
Maximum Temperature ◽  
State Equations ◽  
Plasma Method ◽  
Piston Head

The purpose of the work is to identify complex transient heat flow paths in the combustion chamber of engine, significantly improve the models of diesel engine heat flow, and study the effect of aluminum oxide coating by the galvanic plasma method on short-term and long-term reactions of the piston head. The analysis of operation of aluminum alloy coated diesel engine piston is carried out using a modified quasi -steady method and a finite element method. A thermodynamic analysis is presented using energy and state equations with corresponding gas heat transfer. Time-dependent boundary conditions are set on the gas-blown surfaces of 2D finite element transition models of combustion chamber components. It is shown that this methodology can reveal complex transient paths of the heat flow in engine combustion chambers and distribution details of heat losses in various cooling media. Numerical simulation has shown that the maximum temperature increase relative to the uncoated piston is 64.3% for the coating thickness of 0.13 mm. Tests have shown that the coatings can endure up to 280 thermal cycles. It is found out that predictions of numerical simulation are in good agreement with the results of experiments conducted with repaired pistons. The experimental operation of Cummins КТА 38 engines at Chernogorsk and Vostochno-Beysk coal mines has shown that the engine equipped after repair with the piston coated with aluminum applied by the galvanic plasma method has been in operation for 2 years and 3 months, whereas its set overhaul period is 18,000 hours. Therefore, the proposed methodology allows to reduce temperature variations in the piston and, thereby increase the service life of engine pistons coated with the use of the thermal barrier coating technology.

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