scholarly journals Analysis of air flow velocity distribution in the intake system of an SI engine

2017 ◽  
Vol 169 (2) ◽  
pp. 152-157
Author(s):  
Szymon KOŁODZIEJ ◽  
Grzegorz LIGUS ◽  
Jarosław MAMALA ◽  
Andrzej AUGUSTYNOWICZ
Keyword(s):  
Air Flow ◽  
Intake Manifold ◽  
Si Engine ◽  
Work Time ◽  
Flow Disturbances ◽  
Flow Through ◽  
Load Simulator ◽  
Air Flow Velocity ◽  
Main Component ◽  
Time Density

The conditions of air flow in the intake determine power generated by the engine to a large extent. The biggest resistances in flow of the air sucked or pumped into the engine are generated by the throttle, which is at the same time the main component which allows for regulation of engine power. For the purpose of research conducted in this work, time density of engine work points in analyzed velocity profiles was determined with the use of Engine Road Load Simulator. Thanks to the knowledge of time velocity, it was possible to determine throttle positions at which the engine operates most frequently. With the use of image analysis methods, obtained parameters were experimentally researched, considering flow disturbances which are the effect of air flow through the throttle and uneven air distribution in the intake manifold of a four-cylinder engine.

A numerical analysis of the air flow through the IC engine intake manifold

2019 ◽  
Vol 19 (1) ◽  
pp. 63 ◽  
Author(s):  
Artur Cebula ◽  
Piotr �š ◽  
N.A. wiątek ◽  
Sebastian Kowalczyk
Keyword(s):  
Numerical Analysis ◽  
Air Flow ◽  
Intake Manifold ◽  
Ic Engine ◽  
Flow Through

scholarly journals The effect of trays’ slope in the tunnel dryer on drying rate of carrot cubes

2018 ◽  
Vol 4 (21) ◽  
pp. 345-356
Author(s):  
Jarosław Kubiaszczyk ◽  
Ewa Golisz ◽  
Małgorzata Jaros
Keyword(s):  
Air Flow ◽  
Slope Angle ◽  
Food Preservation ◽  
Comsol Multiphysics ◽  
Drying Rate ◽  
Tunnel Dryer ◽  
Heated Air ◽  
Air Stream ◽  
Flow Through ◽  
Air Flow Velocity

Drying of food is perhaps the oldest method of food preservation. The aim of this study the analysis of the effect of changing the slope angle of trays in a tunnel dryer model on the drying rate. Real experiments were carried out for trays’ slopes of 0, 5, 10 and 15°. Carrots’ cubes were dried at a constant temperature of 60°C, with air flow velocity of 1.2 m/s. Also this process was simulated using the COMSOL Multiphysics 4.3 software. The research results showed that increasing slope angle of tray disrupted the laminar flow of the dried cubes layer through the drying air stream and forced the partial air flow through the layer. Thus, the contact surface of the heated air with the material particles and the drying rate have been increased and made it possible to shorten the duration of the drying.

Air Flow Simulation in a Diesel Engine

2010 ◽  
Author(s):  
Joaqui´n Ferna´ndez ◽  
Alfonso Marcos ◽  
Rau´l Barrio ◽  
Eduardo Blanco ◽  
Alejandro Castilla
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Mass Flow ◽  
Air Flow ◽  
Flow Simulation ◽  
Intake Manifold ◽  
Experimental Measurements ◽  
Average Mass ◽  
Test Engine ◽  
Flow Through

The intake manifold of a Diesel engine is of significant importance. Several modifications are usually carried out in this system to increase the power generated without modifying the general design of the engine. This work presents a numerical and experimental investigation on the air flow in a commercial Diesel engine. The air average mass flow through the intake manifold was obtained experimentally for the D909 Deutz-Diter Diesel engine. Additionally, a numerical model was created for the test engine. The model reproduces the operating and boundary conditions of the flow and integrates the equations that describe the motion of the fluid. The average mass flow through the engine was obtained from the model and compared with the experimental measurements. The model was used subsequently to investigate the air flow within the engine.

Transient Behavior of Air Flow through the Intake Manifold of a Heavy Duty Diesel Engine

2011 ◽  
Vol 87 ◽  
pp. 146-150 ◽  
Author(s):  
T. Srisattha ◽  
S. Issarakul ◽  
Wishsanuruk Wechsatol ◽  
K. Wannatong
Keyword(s):  
Diesel Engine ◽  
Air Flow ◽  
Transient Behavior ◽  
Intake Manifold ◽  
Heavy Duty ◽  
Numerical Techniques ◽  
Heavy Duty Diesel Engine ◽  
Valve Opening ◽  
Flow Through ◽  
Heavy Duty Diesel

This research is aimed to study the transient behavior of air flow through the intake manifold of a heavy duty diesel engine according to the step of valve opening. The numerical study of air flow through the intake manifold was done on the 6SD-1 Isuzu engine. Two numerical techniques, finite element and finite volume methods were used in comparison and tendency confirmation of air flow characteristics inside the manifold. The transient air flow was studied at the engine speed of 1,000 rpm, 1,500 and 2,000 rpm. The numerical results from both numerical techniques agree exceptionally well with each other. The transient behavior of air flow according to the step of valve opening is well illustrated.

The Analysis of Intake Manifold Air Stream Velocity on Different Material Roughness

2014 ◽  
Vol 661 ◽  
pp. 143-147
Author(s):  
Muhammad Arif Abdul Hamid Pahmi ◽  
Sharzali Che Mat ◽  
Ahmad Nazri Nasruddin ◽  
Mohd Fauzi Ismail ◽  
Mohd Najib Yusof
Keyword(s):  
Surface Roughness ◽  
Cast Iron ◽  
Air Flow ◽  
Three Dimensional ◽  
Internal Surface ◽  
Intake Manifold ◽  
Stream Velocity ◽  
Air Stream ◽  
Air Flow Velocity ◽  
Primary Materials

Intake manifold is a crucial part in an engine that acts as a medium for air flow to mix with the fuel before entering the combustion chamber. For years, cast iron and aluminium were the primary materials chosen for fabrication of an intake manifold before plastic based material was introduced to the field. However, there is lack of research involving the usage of plastic as the intake manifold material. In this paper, the effects of internal surface roughness variations (Cast iron, aluminium and plastic) inside the intake manifold were studied. Three dimensional, intake manifold model was developed to simulate the airflow. The study emphasized on the airflow velocity inside the intake manifold. The study showed that the surface roughness influenced the air flow velocity near the intake manifold outlet. The plastic based intake manifold exhibited the highest air stream velocity (near the intake manifold outlet) at 477.770 m/s. This value is 0.60% and 0.40% higher than those produced by the cast iron and aluminium intake manifold, respectively.

EXPERIMENTAL AND ANALYTICAL STUDIES OF VERTICAL AXIS WIND TURBINES

2018 ◽  
pp. 51-58
Author(s):  
B. P. Khozyainov
Keyword(s):  
Wind Turbine ◽  
Flow Velocity ◽  
Wind Power ◽  
Wind Turbines ◽  
Power Efficiency ◽  
Air Flow ◽  
Geometrical Parameters ◽  
Wind Speeds ◽  
Analytical Studies ◽  
Air Flow Velocity

The article carries out the experimental and analytical studies of three-blade wind power installation and gives the technique for measurements of angular rate of wind turbine rotation depending on the wind speeds, the rotating moment and its power. We have made the comparison of the calculation results according to the formulas offered with the indicators of the wind turbine tests executed in natural conditions. The tests were carried out at wind speeds from 0.709 m/s to 6.427 m/s. The wind power efficiency (WPE) for ideal traditional installation is known to be 0.45. According to the analytical calculations, wind power efficiency of the wind turbine with 3-bladed and 6 wind guide screens at wind speedsfrom 0.709 to 6.427 is equal to 0.317, and in the range of speed from 0.709 to 4.5 m/s – 0.351, but the experimental coefficient is much higher. The analysis of WPE variations shows that the work with the wind guide screens at insignificant average air flow velocity during the set period of time appears to be more effective, than the work without them. If the air flow velocity increases, the wind power efficiency gradually decreases. Such a good fit between experimental data and analytical calculations is confirmed by comparison of F-test design criterion with its tabular values. In the design of wind turbines, it allows determining the wind turbine power, setting the geometrical parameters and mass of all details for their efficient performance.

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