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 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 Numerical simulation of plane flow field and the force on the inner rod induced by planetary motion of the rod string

2021 ◽  
Vol 257 ◽  
pp. 02057
Author(s):  
Yang Zhang ◽  
Shimin Dong ◽  
Qin Li ◽  
Zhe Wang ◽  
Yu Yang ◽  
...  
Keyword(s):  
Flow Field ◽  
Velocity Distribution ◽  
Secondary Flow ◽  
Fluid Velocity ◽  
Critical Value ◽  
Planetary Motion ◽  
Plane Flow ◽  
Fluid Force ◽  
Narrow Space ◽  
The Revolution

In order to a the flow of the plane flow field induced by the inner rod rotates and revolves in the cylinder, the Fluent software is used to numerically simulate the plane flow field of the eccentric annulus generated by the planetary motion of the rod string and based on the superposition principle. The velocity distribution and secondary flow of the two flow fields, as well as the fluid force on the inner rod are analyzed. The calculation results show that the flow field induced by the eccentric rotation of the inner rod and the self-rotation of the outer cylinder is quite different from the planetary motion of the inner rod. When rotation of the inner rod has the same direction with the revolution direction, the fluid velocity distribution near the wall of the inner rod is that the velocity on the narrow space side of the annulus is large, and on the wide space side is small. There is a critical value of eccentricity for secondary flow appears when the eccentricity is greater than this value. When rotation of the inner rod is contrary to the revolution, the fluid velocity distribution near the wall of the inner rod is that the velocity on the wide space side of the annulus is large, on the narrow space side is small. Different eccentricity has obvious secondary flow phenomenon where appears in a wide gap and close to the inner rod. When the inner rod revolves, there is a critical value of eccentricity, the inner rod is pushed outward by the fluid force when the eccentricity is less than this critical value. On the contrary, the inner rod is pushed inward. When rotation and revolution are reversed, the critical value of eccentricity increases, when the rotation and revolution are in the same direction, the critical value of eccentricity decreases.

Analysis on the Inhomogeneity of Air Intake and Retrofit Optimization of the Air Intake Pipe in the Engine T12V190

2014 ◽  
Vol 635-637 ◽  
pp. 7-12
Author(s):  
Xiao Jie Li ◽  
Zhong Yu Zhao ◽  
Yu Tian Pan
Keyword(s):  
Flow Field ◽  
Three Dimensional ◽  
Three Dimension ◽  
Intake Pipe ◽  
Performance Reduction ◽  
Cavity Structure ◽  
Air Intake ◽  
Dimensional Simulation ◽  
And Performance ◽  
Retrofit Design

Taking the air intake pipe in the engine as the target of the research, the software STAR-CDE is adopted to build a three-dimensional simulation model for the air intake pipe in the engine T12V190 with the aim to solve the problems of air input deficiency, Combustion deterioration and performance reduction of one cylinder caused by the non-uniformity. Moreover, the non-uniformity of the flux of air intake of the air intake pipe is mainly studied and analyzed through a calculation on the CFD of the inner flow field of the three dimension of the air intake pipe in the engine T12V190. In addition, a retrofit design with multiple schemes is made based on the cavity structure of the original mold for the air intake pipe. Finally, through a comparison among the three selected designs, a more feasible retrofit designing scheme and a designing thought on the air intake pipe in the engine with directional significance are got.

An Experimental Investigation of Crossflow Jet Influence on Dilute Gas-Solid Flow in a Rectangular Duct

2010 ◽  
Author(s):  
Yao Fu ◽  
Tong Wang ◽  
Chuangang Gu
Keyword(s):  
Flow Field ◽  
Gas Flow ◽  
Particle Distribution ◽  
Control Method ◽  
Fluid Velocity ◽  
Average Particle ◽  
Good Prospect ◽  
Test Conditions ◽  
Jet Control ◽  
Gas Flow Field

In this paper an experimental setup was built to investigate jet flow normal to a confined rectangular multiphase crossflow. In order to achieve uniform particle distribution, the inlet and transition channel were carefully designed and adjusted. The experiments were carried out with 2 test conditions, with Rec/Rejet of 7.9 × 104/3.1 × 104 and 7.0 × 104/1.8 × 104. Four classes of particles were used in both of the test conditions. The planar gas flow field and particle distribution on the symmetric cross section were measured by DPIV system. Mean fluid velocity results and transient flow visualization images were used to analyze the jet influence on the gas flow field. In the transient images of some classes of particles, vortex structures were found to be similar but not exactly the same to the free jet structure. A new set of arithmetic was developed to distinguish particle spots from noisy raw images. The results getting from this arithmetic reveals the time-average particle concentration on the jet influence. The analysis proved that the jet control method may set a gas barrier in the flow field to influence the particle distribution. Such an effect is diameter-selective. The experimental results showed a good prospect on the application of wall jet control method in inertia separator.

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

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.

Study on the Effect of Cone Diameter on the Cone Resistance and Steady Flow Force of Hydraulic Poppet Valve

2013 ◽  
Vol 834-836 ◽  
pp. 1493-1496 ◽  
Author(s):  
Jin Yan Shi
Keyword(s):  
Flow Field ◽  
Steady Flow ◽  
Structure Parameters ◽  
Cone Resistance ◽  
Poppet Valve ◽  
D Model

The 3-D model is established and is meshed. Then the inner flow field of the poppet valve is simulated at different cone diameter E, different opening positions. Analyzing the result of simulation, the variation curves of cone resistance and steady flow force in different opening of different structure parameters can be obtained. This study for the valve offers the significant reference for designing the valve and optimizing its performance.

Numerical Simulation and Analysis of 3-D Internal Flow Field in Mechanical Turbulent Coal Pulverizer

2012 ◽  
Vol 170-173 ◽  
pp. 3300-3303
Author(s):  
Wei Lv ◽  
Zhi Yue Yao ◽  
De Li Zhang ◽  
Xin Hai Wang ◽  
Xiao Nan Zhang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Flow Field ◽  
Velocity Distribution ◽  
Secondary Flow ◽  
Eddy Current ◽  
Gas Flow ◽  
Internal Flow ◽  
Flow Phenomenon ◽  
Computation Fluid Dynamics

In this paper, the computation fluid dynamics ( CFD) software FLUENT is applied to analyze the internal 3-D gas flow of the mechanical turbulent coal pulverizer impeller, especially on the pressure and velocity distribution. Eddy current-wake and secondary flow phenomenon is found in the pulverizer.

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.

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