scholarly journals 1D–3D Coupling for Gas Flow Analysis of the Air-Intake System in a Compression Ignition Engine

2021 ◽  
Vol 9 (5) ◽  
pp. 553
Author(s):  
Kyong-Hyon Kim ◽  
Kyeong-Ju Kong
Keyword(s):  
Gas Flow ◽  
Pollutant Emissions ◽  
Experimental Result ◽  
Compression Ignition ◽  
Ansys Fluent ◽  
Intake System ◽  
Intake Pipe ◽  
Air Intake ◽  
Ci Engine ◽  
Coupling Algorithm

Devices for reducing environmental pollutant emissions are being installed in ship compression ignition (CI) engines; alternatively, the designs of intake and exhaust pipes and ports are being modified to tune the performance according to the user’s needs. In both cases, substantial computation time and cost are required to simulate the gas flow of the CI engine with an air-intake system. In order to simulate the air-intake system of the CI engine, which changes according to the user’s needs, at a low cost and in a short time, we aimed to analyze the gas flow using a 1D–3D coupled method. The 1D zone was analyzed using the method of characteristics, and the 3D zone was analyzed using the commercial computational fluid dynamics (CFD) code Ansys Fluent R15.0, whereas their coupling was achieved by applying the developed 1D–3D coupling algorithm to Ansys Fluent R15.0 using user-defined functions (UDFs). In the comparison of the pressure of the intake pipe with the experimental result, the average error was 0.58%, thereby validating the approach. In addition, when analyzing the intake pipe and port in a 3D zone, the results of the velocity and pressure were expressed as contours, allowing them to be visualized. It is expected that the 1D–3D coupling algorithm of the air-intake system can be used to reflect the user’s needs and can be used as a method to quickly and accurately calculate the gas flow within tens of minutes.

scholarly journals 1D–3D Coupling Algorithm of Gas Flow for the Valve System in a Compression Ignition Engine

2021 ◽  
Vol 9 (10) ◽  
pp. 1061
Author(s):  
Kyeong-Ju Kong
Keyword(s):  
Gas Flow ◽  
Flow Analysis ◽  
Emission Control ◽  
Experimental Results ◽  
Exhaust Gas ◽  
Compression Ignition ◽  
Valve System ◽  
Ci Engine ◽  
Control Devices ◽  
Coupling Algorithm

Emission control devices such as selective catalytic reduction (SCR), exhaust gas recirculation (EGR), and scrubbers were installed in the compression ignition (CI) engine, and flow analysis of intake air and exhaust gas was required to predict the performance of the CI engine and emission control devices. In order to analyze such gas flow, it was inefficient to comprehensively analyze the engine’s cylinder and intake/exhaust systems because it takes a lot of computation time. Therefore, there is a need for a method that can quickly calculate the gas flow of the CI engine in order to shorten the development process of emission control devices. It can be efficient and quickly calculated if only the parts that require detailed observation among the intake/exhaust gas flow of the CI engine are analyzed in a 3D approach and the rest are analyzed in a 1D approach. In this study, an algorithm for gas flow analysis was developed by coupling 1D and 3D in the valve systems and comparing with experimental results for validation. Analyzing the intake/exhaust gas flow of the CI engine in a 3D approach took about 7 days for computation, but using the developed 1D–3D coupling algorithm, it could be computed within 30 min. Compared with the experimental results, the exhaust pipe pressure occurred an error within 1.80%, confirming the accuracy and it was possible to observe the detailed flow by showing the contour results for the part analyzed in the 3D zone. As a result, it was possible to accurately and quickly calculate the gas flow of the CI engine using the 1D–3D coupling algorithm applied to the valve system, and it was expected that it can be used to shorten the process for analyzing emission control devices, including predicting the performance of the CI engine.

Based on 3-D Modeling and Value Simulation of the Intake System in CNG

2014 ◽  
Vol 989-994 ◽  
pp. 3477-3479
Author(s):  
Jing Hua Li ◽  
Jiang Jiang Li
Keyword(s):  
Flow Field ◽  
Velocity Distribution ◽  
Steady Flow ◽  
Heat Load ◽  
Gas Flow ◽  
Fluid Velocity ◽  
Intake System ◽  
Intake Pipe ◽  
Air Intake ◽  
D Model

The structure of the air intake system directly affect the combustion and heat load in each cylinder. In this paper, using the CFD experience can look the intake pipe gas flow as a 3-D compressed steady flow. It is easy to built a 3-D model grids with the help of GAMBIT software .Using the FLUENT soft software ,it is reasonable to get the the fluid velocity distribution in flow field , and calculate the fluid flowing quality at the exit of manifold, as well as analyze the inhomogeneity of the inlet air.

scholarly journals 3D Simulation of Gas Flow into the Formula Student Car Intake System

2020 ◽  
pp. 597-610
Author(s):  
Barhm Mohamad ◽  
Jalics Karoly ◽  
Andrei A. Zelentsov
Keyword(s):  
Gas Flow ◽  
Intake Manifold ◽  
Design And Optimization ◽  
Intake System ◽  
Race Car ◽  
Racing Performance ◽  
Winning Team ◽  
Design Competition ◽  
Air Intake ◽  
The One

Formula Student Car (FS) is an international race car design competition for students at universities of applied sciences and technical universities. The winning team is not the one that produces the fastest racing car, but the group that achieves the highest overall score in design, racing performance. The arrangement of internal components for example, predicting aerodynamics of the air intake system is crucial to optimizing car performance as speed changes. The air intake system consists of an inlet nozzle, throttle, restrictor, air box and cylinder suction pipes (runners). The paper deals with the use of CFD numerical simulations during the design and optimization of components. In this research article, two main steps are illustrated to develop carefully the design of the air box and match it with the suction pipe lengths to optimize torque over the entire range of operating speeds. Also the current intake system was assessed acoustically and simulated by means of 1-D gas dynamics using the software AVL-Boost. In this manner, before a new prototype intake manifold is built, the designer can save a substantial amount of time and resources. The results illustrate the improvement of simulation quality using the new models compared to the previous AVL-Boost models

Numerical Simulation of a Compression Ignition Engine Using Biodiesel Fuel

2003 ◽  
Author(s):  
C. Purohit ◽  
K. Aung
Keyword(s):  
Numerical Simulations ◽  
Diesel Engines ◽  
Alternative Fuels ◽  
Current Model ◽  
Pollutant Emissions ◽  
Biodiesel Fuel ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Ci Engine ◽  
Ci Engines

Increasing concerns over pollutant emissions from diesel engines have prompted researchers to find replacement fuels for diesel engines. The use of alternative fuels such as biodiesel in compression-ignition (CI) engines is beneficial to the environment as it reduces emissions of pollutants with slight penalty on the performance. This paper investigated the use of biodiesel fuel (rapeseed oil) in a CI engine by numerical simulations. The numerical simulations were based on the models of finite heat release, cylinder heat transfer, and friction losses. Simulations were carried out to evaluate the effects of compression ratio, equivalence ratio, and engine speed on the performance of the CI engine. The results of the simulations were compared with experimental data from the literature to validate the simulations. Good agreements between the computed and experimental results were obtained. The results showed that the current model could satisfactorily predict the performance of a biodiesel-fueled CI engine.

Performance Simulation Research of Electronic Controlled Gasoline Engine

2011 ◽  
Vol 402 ◽  
pp. 835-840
Author(s):  
Ji Ping Lei ◽  
Qing Song Zuo
Keyword(s):  
Gas Flow ◽  
Gasoline Engine ◽  
Dynamic Performance ◽  
Reference Value ◽  
Pipe Length ◽  
Simulation Research ◽  
Performance Simulation ◽  
Intake Pipe ◽  
Air Intake ◽  
Length Variable

To solve the high or low speed air-intake contradictions in the air-intake system of fixed parameters，based on predesigning the air-intake pipe length variable system in electronic controlled gasoline engine, the gas flow in the pipes is computed and simulated according to the simulative calculation method. The Performance of electronically controlled gasoline engine is analysed under the different speed and load.At the end,the dynamic performance influenced by the length parameter vary air-intake pipe,which findings provide a good reference value for the improvement of the engine’s dynamic performance.

Application of Box-Behnken Analysis on the Optimisation of Air Intake System for a Naturally Aspirated Engine

2020 ◽  
Vol 17 (2) ◽  
pp. 8029-8042
Author(s):  
N.S. Mustafa ◽  
N.H.A. Ngadiman ◽  
M.A. Abas ◽  
M.Y. Noordin
Keyword(s):  
Fuel Consumption ◽  
Fuel Efficiency ◽  
Engine Performance ◽  
Fuel Price ◽  
Design Expert ◽  
Intake System ◽  
Analysis Technique ◽  
System Components ◽  
Air Intake ◽  
High Influence

Fuel price crisis has caused people to demand a car that is having a low fuel consumption without compromising the engine performance. Designing a naturally aspirated engine which can enhance engine performance and fuel efficiency requires optimisation processes on air intake system components. Hence, this study intends to carry out the optimisation process on the air intake system and airbox geometry. The parameters that have high influence on the design of an airbox geometry was determined by using AVL Boost software which simulated the automobile engine. The optimisation of the parameters was done by using Design Expert which adopted the Box-Behnken analysis technique. The result that was obtained from the study are optimised diameter of inlet/snorkel, volume of airbox, diameter of throttle body and length of intake runner are 81.07 mm, 1.04 L, 44.63 mm and 425 mm, respectively. By using these parameters values, the maximum engine performance and minimum fuel consumption are 93.3732 Nm and 21.3695×10-4 kg/s, respectively. This study has fully accomplished its aim to determine the significant parameters that influenced the performance of airbox and optimised the parameters so that a high engine performance and fuel efficiency can be produced. The success of this study can contribute to a better design of an airbox.

Pollutant emissions investigation in a compression ignition engine during warm-up time

2017 ◽  
Author(s):  
Naiara Lima Costa ◽  
Ramon Eduardo Pereira Silva ◽  
Letícia Schneider Ferrari
Keyword(s):  
Pollutant Emissions ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Warm Up

Numerical Study on the Removal of Hydrogen and Nitrogen from the Melt of Medium Carbon Steel in Vacuum Tank Degasser

2013 ◽  
Vol 762 ◽  
pp. 253-260 ◽  
Author(s):  
Shan Yu ◽  
Jyrki Miettinen ◽  
Seppo Louhenkilpi
Keyword(s):  
Carbon Steel ◽  
Liquid Steel ◽  
Gas Flow ◽  
Numerical Study ◽  
Vacuum Treatment ◽  
Medium Carbon Steel ◽  
Transfer Coefficients ◽  
Ansys Fluent ◽  
Medium Carbon ◽  
Cell Expression

The steelmaking field has been seeing an increased demand of reducing hydrogen and nitrogen in liquid steel before casting. This is often accomplished by vacuum treatment. This paper focuses on developing a numerical model to investigate the removal of hydrogen and nitrogen from the melt of medium carbon steel in a commercial vacuum tank degasser. An activity coefficient model and the eddy-cell expression are implemented in the ANSYS FLUENT code to compute the activities of related elements and mass transfer coefficients of hydrogen and nitrogen in liquid steel. Several cases are simulated to assess the effect of gas flow rate and initial nitrogen content in liquid steel on degassing process and the calculated results are compared with industrial measured data.

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