scholarly journals Numerical Modelling of Air Flow Attributes in a Contractions Chamber

2014 ◽  
Vol 14 (2) ◽  
pp. 11-16 ◽  
Author(s):  
Vladimíra Michalcová ◽  
Sergej Kuznětsov ◽  
Stanislav Pospíšil
Keyword(s):  
Numerical Modelling ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Air Flow ◽  
Optimal Shape ◽  
Ansys Fluent ◽  
Fluent Software ◽  
Enclosed Chamber ◽  
Physics Experiment

Abstract The article describes air flow turbulent attributes in the enclosed chamber of a rectangular cross-section contraction for the purpose of confirming its optimal shape. The task is solved numerically using Ansys Fluent software. Right models were selected based on the evaluated results at a contraction's outlet which were compared to the physics experiment

Numerical and Experimental Modelling of an Air Flow Field in the Chamber of a Rectangular Cross-Section Contraction

2015 ◽  
Vol 769 ◽  
pp. 161-165
Author(s):  
Vladimira Michalcova ◽  
Sergej Kuznetsov ◽  
Lenka Lausova ◽  
Iveta Skotnicova
Keyword(s):  
Cross Section ◽  
Rectangular Cross Section ◽  
Optimal Shape ◽  
High Quality ◽  
Ansys Fluent ◽  
Experimental Modelling ◽  
Software Models ◽  
Turbulent Characteristics ◽  
Fluent Software ◽  
Enclosed Chamber

The article describes the study of turbulent characteristics in the enclosed chamber of a rectangular corss-section nozzle using numerical calculations. Suitable Ansys Fluent software models were selected based on the measurements results comparison in an aerodynamic tunnel as the fluid exits the nozzle. Special attention is paid to profile velocity near the peripheral wall of the observed enclosed chamber in order to confirm the optimal shape of the contraction and thus take steps towards a high quality velocity field.

scholarly journals Numerical Modelling Of Humid Air Flow Around A Porous Body

2015 ◽  
Vol 9 (3) ◽  
pp. 161-166
Author(s):  
Aneta Bohojło-Wiśniewska
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Porous Medium ◽  
Numerical Modelling ◽  
Chinese Cabbage ◽  
Air Flow ◽  
Transfer Model ◽  
Humid Air ◽  
Ansys Fluent ◽  
Complex Heat Transfer

Summary This paper presents an example of humid air flow around a single head of Chinese cabbage under conditions of complex heat transfer. This kind of numerical simulation allows us to create a heat and humidity transfer model between the Chinese cabbage and the flowing humid air. The calculations utilize the heat transfer model in porous medium, which includes the temperature difference between the solid (vegetable tissue) and fluid (air) phases of the porous medium. Modelling and calculations were performed in ANSYS Fluent 14.5 software.

scholarly journals Comparison of RANS and scale-resolving approaches when modelling the turbulent flow behind a bluff body

2019 ◽  
Vol 196 ◽  
pp. 00036
Author(s):  
Svetlana V. Pogudalina ◽  
Natalya N. Fedorova ◽  
Svetlana A. Valger
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Calculation ◽  
Turbulent Flow ◽  
Bluff Body ◽  
Air Flow ◽  
Ansys Fluent ◽  
Fluent Software

In this paper, the results of a numerical simulation of the air flow in the vicinity of a parallelepiped fixed on a plate are presented. The 3D calculations were performed with the ANSYS Fluent software using scale-resolving DES approach. The obtained results are compared with the experimental data and with the results of the previous numerical calculation.

An Evaluation of Drag Coefficient of Wind Turbine System Installed on Moving Car

2014 ◽  
Vol 660 ◽  
pp. 689-693 ◽  
Author(s):  
Mohd Sofian ◽  
Rosly Nurhayati ◽  
A.Jamit Rexca ◽  
S. Shamsudin Syariful ◽  
Abdullah Aslam
Keyword(s):  
Drag Coefficient ◽  
Wind Turbine ◽  
Air Flow ◽  
Aerodynamic Performance ◽  
Ansys Fluent ◽  
Car Body ◽  
Wind Turbine System ◽  
Fluent Software ◽  
Suitable Area

This study presents a simulation result of an evaluation of the aerodynamic performance of a moving car with a wind turbine system. Sedan type cars (approaching the size of Proton Wira car) were modeled using the SolidWork software and simulation was done by ANSYS FLUENT software. Three car models with different wind turbine system positions (in front of the front bumper, on top of the hood and on top of the roof) plus one model without the wind turbine system were simulated. The study proved that the position of the wind turbine system installation will change the characteristic of the air flow around the car body and affects the aerodynamic performance of the car. Extended front bumper of a car is not significantly affecting the aerodynamic performance of the car. This extended bumper seems to be the suitable area to install a wind turbine system and the investigation shows that the aerodynamic performance of the car improved due to lower drag coefficient, Cd..

scholarly journals From 0D to 3D Aero-Thermo-Fluid Simulations of a Fan Outlet Guide Vane Cooler (FOGVC)

2021 ◽  
Author(s):  
Luis Costero Sánchez ◽  
Klaus Höschler ◽  
Sagar Sadananda Bhat
Keyword(s):  
Cross Section ◽  
Guide Vane ◽  
Rectangular Cross Section ◽  
Circular Cross Section ◽  
Heat Rate ◽  
Internal Cavity ◽  
Thin Wall ◽  
Wall Model ◽  
Ansys Fluent ◽  
First Time

As the first time, 0D-1D-3D and fully 3D steady-state aero-thermo-fluid simulations of a structural oil-to-air Fan Outlet Guide Vane Cooler (FOGVC) in a jet engine are presented. Using the commercial softwares Ansys Fluent, the thermo-mechanical module of Ansys and the 1D fluid solver Flownex, 5 simulation types (3D fully conjugate heat transfer with and without a thin wall model, 3D with a thin wall model, 1D-3D coupled, 1D and 0D) corresponding to 4 levels of simplification in 3 possible domains (oil, oil-metal and oil-metal-air) have been compared to provide selection criteria when a determined level of accuracy in the simulations without prohibited computational times is desired. The methodologies are applied to two different oil internal cavities: an inverted U with rectangular cross section and a coil internal cavity with a circular cross section. The obtained results show that depending on the scope of the research (outlet oil temperature, dissipated heat rate or oil pressure drop) and the accuracy of the results, one method or the other may be used. Experimental data would be needed to validate the numerical results by all employed methodologies and geometries.

Numerical modelling of hydraulic jumps in a spiral channel with rectangular cross section

2002 ◽  
Vol 31 (3) ◽  
pp. 185-213 ◽  
Author(s):  
Wolfgang Schacht ◽  
Evgenii V. Vorozhtsov ◽  
Anatoly F. Voevodin ◽  
Vladimir V. Ostapenko
Keyword(s):  
Numerical Modelling ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Hydraulic Jumps ◽  
Spiral Channel

scholarly journals The Analysis of wind action on building and scaffolding system

2013 ◽  
Vol 12 (2) ◽  
pp. 111-118
Author(s):  
Paulina Jamińska
Keyword(s):  
Cross Section ◽  
Rectangular Cross Section ◽  
Wind Flow ◽  
Computational Domain ◽  
Cfd Simulations ◽  
Ansys Fluent ◽  
Model Calculations ◽  
Turbulent Wind ◽  
Wind Action ◽  
Actual Flow

In the present study an attempt to evaluate the effect of wind action on the building - scaffolding system was made. Analysis was based on the CFD simulations using ANSYS FLUENT and RNG k-ε turbulence model. Calculations were performed for 2D case of building of rectangular cross-section. Turbulent wind flow was modelled around the building and the building with a scaffolding set along longer wall. Four different angles of wind attack: 0 °, 45 °, 90 ° and 135 ° were taken into account. The results are shown in the form of pressure distribution on the walls of model and the velocity distribution in the computational domain, and later compared to the standard recommendations for scaffoldings. The analysis indicated that the actual flow around a building with scaffolding is much more complicated than the flow shown in standards. It can even lead to scaffold collapse due to the wind induced torque forces.

scholarly journals AIR FLOW ANALYSIS AROUND THE AUTOGYRO FUSELAGE

2017 ◽  
Vol 3 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Zbigniew Czyż ◽  
Ibrahim Ilhan ◽  
Mert Akcay ◽  
Jacek Czarnigowski
Keyword(s):  
Drag Force ◽  
Lift Force ◽  
Air Flow ◽  
Flow Analysis ◽  
Angle Of Attack ◽  
Three Dimensional ◽  
Aerodynamic Forces ◽  
Ansys Fluent ◽  
Fluent Software

The paper presents the results of the simulation of the air flow around the gyroplane without the influence of the rotor and pusher propellers. Three-dimensional calculations were performed using ANSYS Fluent software. Based on the calculations, the values of the drag force and the lift force on each component of the rotorcraft were determined. Based on the results obtained, the effect of angle of attack on the aerodynamic forces was obtained.

scholarly journals Numerical Simulation Studies on Stall Suppression of a NACA0015 Airfoil

2021 ◽  
Vol 6 ◽  
pp. 23-31
Author(s):  
Biswash Shrestha ◽  
Nawraj Bhattarai
Keyword(s):  
Reynolds Number ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Constant Width ◽  
Low Reynolds Number ◽  
Lift Coefficient ◽  
Leading Edge ◽  
Ansys Fluent ◽  
Control Plate ◽  
Low Reynolds

This study aims to achieve an improved airfoil performance at low Reynolds number, and to determine the optimum position and size of rectangular cross-section burst control plate (BCP) to suppress stall in airfoil. The type of airfoil used in the present study is NACA0015 (National Advisory Committee for Aeronautics) airfoil with 200 mm of chord (c) length. Here, rectangular cross-section burst control plates with different sizes and at different locations are investigated numerically at the low Reynolds number of 1.6×105. Total of three positions (0.05c, 0.1c and 0.2c from the leading edge of airfoil), and four sizes (with heights 0.3 mm, 0.7mm, 1mm and 1.5 mm, and constant width 4 mm) of rectangular BCPs are simulated in ANSYS Fluent software using Transition SST model. The results indicate that the rectangular cross-section burst control plate is an effective device in the suppression of airfoil stall. For 0.7 mm and 1 mm height BCPs, the stall angle is postponed by 2° for all positions, while for 0.3 mm and 1.5 mm height BCPs, the reduction in sudden fall of lift can be observed but at the cost of reduction in maximum lift coefficient. Among various configurations, the 1mm height BCP located at 0.2c position is found to be most effective in the suppression of stall.

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