scholarly journals Simulation tests on air flow through selected types of throttle bodies

2010 ◽  
Vol 140 (1) ◽  
pp. 32-39
Author(s):  
Dariusz SZPICA
Keyword(s):  
Air Flow ◽  
Flow Characteristics ◽  
Experimental Tests ◽  
Test Results ◽  
Simulation Test ◽  
Experimental Conditions ◽  
Specific Flow ◽  
Edge Conditions ◽  
Flow Through ◽  
Solid Works

The paper presents selected simulation test results of the air flow through various types of throttle bodies. The experimental tests were mapped in virtual conditions, using the experimental conditions as initial and edge conditions. The geometry was implemented from the Solid Works software into the COSMOS-FloWorks, in which the simulations were carried out. The results represented supplementation to test stand investigations. The comparison of classic, two stage and profiled intake throttles provided answers to the ques-tions related to the necessity to differentiate the structure in order to achieve specific flow characteristics.

Research of Window's Discharge Coefficient in the Natural Ventilation Room

2014 ◽  
Vol 525 ◽  
pp. 420-426
Author(s):  
Qi Hai Liao ◽  
Yan Ling Guan ◽  
Qiao Ning Wang
Keyword(s):  
Pressure Difference ◽  
Natural Ventilation ◽  
Discharge Coefficient ◽  
Test Bench ◽  
Air Flow ◽  
Experimental Conditions ◽  
Flow Through

Discharge coefficient of window is one of the important factors in natural ventilated calculation, while there are many factors may impact the windows discharge coefficient. This article adopts the method of experiment, simulate the natural ventilation of room on the test bench , by measuring the pressure difference of both sides of window and the air flow through the window under different experimental conditions, analyze how the opening rate of window and the air flow impact the values of discharge coefficient of window, and giving the value of discharge coefficient of window under the experiment condition, hoping to provide help to the use of natural ventilation of building effectively.

CFD Simulation of Air Flow through the Annular Distributor of a Swirling Fluidized Bed

2014 ◽  
Vol 700 ◽  
pp. 619-625 ◽  
Author(s):  
Vinod Kumar Venkiteswaran ◽  
Syaida Hazira Ramli ◽  
Vijay R. Raghavan
Keyword(s):  
Fluidized Bed ◽  
Cfd Simulation ◽  
Air Flow ◽  
Flow Characteristics ◽  
Significant Finding ◽  
Operating Variables ◽  
Air Inlet ◽  
Cross Section Area ◽  
Pressure Profiles ◽  
Flow Through

Fluidized beds are widely used in a variety of industrial processes. The air distributor being an integral part of the fluidized bed, the air flow characteristic through it is of great importance as far as the design and working of it is concerned. Inappropriate design will lead to an incomplete fluidization and improper mixing of the air and bed particles. The current study was carried out to investigate the flow characteristics and predict non-uniformity in flow through the annular distributor of a Swirling Fluidized Bed and its variation with various aspects of the distributor like blade overlap angle and blade inclination. In this study, the commercial CFD package FLUENT 6.3 was used for analysis. The velocity and pressure profiles for various blade designs were investigated at the distributor outlet based on several operating variables including air inlet velocities, blade overlap angles (9o, 12o, 15o, and 18o), blade inclinations (10oand 15o), along with variations in the opening between the distributor blades. The most significant finding of this work is that the fluid tends to flow through a path with least resistance. The flow path with the largest cross section area and shortest path length has been identified and explains the velocity profile at blade exit.

scholarly journals Natural balanced ventilation. Simulations part 2

2018 ◽  
Vol 49 ◽  
pp. 00026
Author(s):  
Tomasz Gaczoł
Keyword(s):  
Natural Ventilation ◽  
Residential Buildings ◽  
Air Flow ◽  
Ventilation System ◽  
Flow Analysis ◽  
Comfort Level ◽  
Test Results ◽  
Pressure System ◽  
Exhaust Duct ◽  
Flow Through

The paper is devoted to test results of air flow through natural ventilation supply-exhaust ducts in the rooms located on the upper floor of the building that were conducted in ANSYS Fluent software. Three types of solutions were selected for the tests: air inflow into the room through the air intake located at the basement level, air inflow through the window ventilator (although no longer used, this solution can be found in many existing residential buildings) and the natural ventilation system supported with the so-called “solar chimney” that is usually a glass superstructure, located on the roof of the building above the ventilation ducts. All simulations were conducted with an outdoor temperature of +3 degrees C. The indoor temperature is + 20 degrees C, considered to be the minimum thermal comfort level. The simulations concerned such issues as: pressure system inside the room and in the exhaust duct, distribution of air temperatures in the room, vector direction of air flow through supply and exhaust ducts and in the room. Tests conducted using a computer method of air flow analysis in ducts and in the analysed room indicate that the developed natural balanced ventilation system is a good solution, especially when building sealing is so common. In all cases presented, it meets the normative regulations and requirements for the ventilation air stream and the air exchange rate in the room. The paper (second part) describes test results concerning the room located on the upper floor of the building, i.e. with a long 9-meter long supply duct and a short 3-meter long exhaust duct.

MGP NAPL interception with organophyllic media: flow-through column test results

2006 ◽  
Vol 14 (2) ◽  
pp. 489-493
Author(s):  
Michael J. Gefell ◽  
Erin C. Rankin ◽  
William R. Jones
Keyword(s):  
Test Results ◽  
Column Test ◽  
Flow Through

On axial compressive behavior of steel fiber reinforced concrete confined by FRP

2021 ◽  
pp. 136943322098165
Author(s):  
Hossein Saberi ◽  
Farzad Hatami ◽  
Alireza Rahai
Keyword(s):  
Reinforced Concrete ◽  
Experimental Test ◽  
Steel Fiber ◽  
Experimental Tests ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Test Results ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Frp Confinement

In this study, the co-effects of steel fibers and FRP confinement on the concrete behavior under the axial compression load are investigated. Thus, the experimental tests were conducted on 18 steel fiber-reinforced concrete (SFRC) specimens confined by FRP. Moreover, 24 existing experimental test results of FRP-confined specimens tested under axial compression are gathered to compile a reliable database for developing a mathematical model. In the conducted experimental tests, the concrete strength was varied as 26 MPa and 32.5 MPa and the steel fiber content was varied as 0.0%, 1.5%, and 3%. The specimens were confined with one and two layers of glass fiber reinforced polymer (GFRP) sheet. The experimental test results show that simultaneously using the steel fibers and FRP confinement in concrete not only significantly increases the peak strength and ultimate strain of concrete but also solves the issue of sudden failure in the FRP-confined concrete. The simulations confirm that the results of the proposed model are in good agreement with those of experimental tests.

scholarly journals Methodology for Selecting the Operating Conditions of a Vibration Generator Used in the Hot-Dip Galvanizing Process

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2042
Author(s):  
Wojciech Kacalak ◽  
Igor Maciejewski ◽  
Dariusz Lipiński ◽  
Błażej Bałasz
Keyword(s):  
Simulation Model ◽  
Asynchronous Motor ◽  
Experimental Tests ◽  
Suspension System ◽  
Operating Conditions ◽  
Test Results ◽  
Forced Simulation

A simulation model and the results of experimental tests of a vibration generator in applications for the hot-dip galvanizing process are presented. The parameters of the work of the asynchronous motor forcing the system vibrations were determined, as well as the degree of unbalance enabling the vibrations of galvanized elements weighing up to 500 kg to be forced. Simulation and experimental tests of the designed and then constructed vibration generator were carried out at different intensities of the unbalanced rotating mass of the motor. Based on the obtained test results, the generator operating conditions were determined at which the highest values of the amplitude of vibrations transmitted through the suspension system to the galvanized elements were obtained.

Investigation on the drag effect of a rolling element confined in the cavity of a cylindrical roller bearing

2021 ◽  
pp. 135065012110260
Author(s):  
Wenjun Gao ◽  
Shuo Zhang ◽  
Xiaohang Li ◽  
Zhenxia Liu
Keyword(s):  
Open Space ◽  
Roller Bearing ◽  
Flow Characteristics ◽  
Experimental Tests ◽  
Windward Side ◽  
Leeward Side ◽  
Drag Effect ◽  
Rolling Element ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

In cylindrical roller bearings, the drag effect may be induced by the rolling element translating in a fluid environment of the bearing cavity. In this article, the computational fluid dynamics method and experimental tests are employed to analyse its flow characteristics and pressure distribution. The results indicate that the pressure difference between the windward side and the leeward side of the cylinder is raised in view of it blocking the flow field. Four whirl vortexes are formed in four outlets of two wedge-shaped areas between the front part of the cylindrical surface and adjacent walls for the cylinder of L/ D = 1.5 at Re = 4.5 × 103. Vortex shedding is found in the direction of cylinder axis at Re = 4.5 × 104. The relationship between drag coefficient and Reynolds number is illustrated, obviously higher than that of the two-dimensional cylinder in open space.

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