Aerodynamic Analysis of a Popular Automobile Model with Various Add-On Devices using Computational Fluid Dynamics

2020 ◽  
Vol 12 (4) ◽  
Author(s):  
M. Thiruchitrambalam ◽  
M. Logesh ◽  
D. Shanmugam ◽  
M. Prabhahar ◽  
S. Prakash
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fuel Economy ◽  
Velocity Vector ◽  
Vortex Generators ◽  
Modified Model ◽  
Aerodynamic Analysis ◽  
Aerodynamic Parameters ◽  
Velocity Contour

This project involves analyzing the aerodynamic parameters of the vehicle and proposing the necessary changes in design to obtain better fuel economy and speed. The original, popular model was modified by the addition of spoilers, front splitters, vortex generators, diffusers, side skirts and front air dams. The popular model and the modified model are compared with respect to velocity contour, velocity streamline contour, velocity vector. It has been found that for the modified model the drag co-efficient can be reduced by 34 % and the downward force can be reduced by 19 %.

Wind Tunnel Testing and Computational Fluid Dynamics Analysis of a Wing-in-Ground Effect Vehicle

2007 ◽  
Author(s):  
Boonseng Soh ◽  
Andrew Low ◽  
Cees Bil ◽  
Brendon Bobbermien
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Tunnel ◽  
Ground Effect ◽  
Wind Tunnel Testing ◽  
Cfd Modelling ◽  
Aerodynamic Analysis ◽  
Computational Fluid Dynamics Analysis ◽  
Wing In Ground Effect ◽  
Tunnel Testing

The Wing-in-Ground Effect Concept Technology Demonstrator (WIGE CTD) project is a joint venture between Advanced Aerosystem Technologies Pty Ltd and RMIT University, aiming to design, validate and build a prototype recreational vehicle to fly two passengers over a distance of 500km at approximately 120km/h. The WIGE vehicle will fly very close to the surface, usually water, taking advantage of ground effect to transport passengers with a greater lift/drag ratio, and thus greater fuel-efficiency than conventional aircraft. Following preliminary design, an aerodynamic analysis of the vehicle was performed using wind tunnel testing and Computational Fluid Dynamics (CFD). This paper describes the methods used for wind tunnel testing and CFD modelling of the WIGE CTD design. Results obtained using the two approaches are compared with the aim of validating the CFD model and the techniques used in both wind tunnel and CFD modelling for use in future analyses. In addition to the aerodynamic analysis, a basic CFD prediction of the maximum hydrodynamic drag experienced during take off was attempted using a simple model of the WIGE vehicle hull. This result is required in order to ensure that the aquatic take off required by WIGE vehicles was possible for the design. Concurrently, the feasibility of using a general-purpose CFD solver like Fluent to analyse hull performance was also evaluated through this aspect of the investigation.

Performance Comparison of Modified Offset Strip Fins Using a CFD Analysis

2016 ◽  
Vol 24 (03) ◽  
pp. 1650015 ◽  
Author(s):  
Seongwon Hwang ◽  
Ji Hwan Jeong
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Heat Exchangers ◽  
Performance Comparison ◽  
Vortex Generators ◽  
Cfd Analysis ◽  
Design Modification ◽  
F Factor ◽  
Computational Fluid Dynamics Cfd ◽  
Goodness Factor

Offset strip fins (OSF) have been widely used in plate-fin heat exchangers. Conventional OSFs are constructed with plain fins. Various design modifications to improve the performance of OSFs are compared here. The modifications suggested include perforations, dimples, vortex generators, and a double-layer design. The performance capabilities are evaluated using a computational fluid dynamics (CFD) analysis. The performances are compared in terms of the j-factor, f-factor, area goodness factor, and volume goodness factor. The f-factors of all modified designs appeared to be higher than that of the plain OSF, while the j-factor was found to be higher or lower than that of the plain OSF depending on the design modification used. The plain OSF has the largest area goodness factor, while OSFs with multiple perforations and dimples show a higher volume goodness factor than the plain OSF.

scholarly journals Aerodynamic Analysis of Spoiler at Varying Speeds and Angles

2021 ◽  
Vol 9 (11) ◽  
pp. 526-535
Author(s):  
Manas Metar
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Cfd Analysis ◽  
Wake Region ◽  
Aerodynamic Analysis ◽  
Pressure Drag ◽  
High Speeds ◽  
Computational Fluid Dynamics Analysis ◽  
Computational Fluid Dynamics Cfd ◽  
Simulation Results

Abstract: Spoilers have been there in practice since years for the purpose of improving aerodynamics of a car. The pressure drag created at the end of the vehicle, referred to as wake region affects handling of the vehicle. This could be hazardous for the cars at high speeds. By adding a spoiler to the rear of the car reduces that pressure drag and the enhanced downforce helps in better traction. The paper presents aerodynamic analysis of a spoiler through Computational Fluid Dynamics analysis. The spoiler is designed using Onshape software and analyzed through SIMSCALE software. The simulation is carried out by changing angles of attack and velocities. The simulation results of downforce and drag are compared on the basis of analytical method. Keywords: Designing a spoiler, Design and analysis of spoiler, Aerodynamics of spoiler, Aerodynamic analysis of spoiler, Computational fluid dynamics, CFD analysis, CFD analysis of spoiler, Spoiler at variable angles, Types of spoilers, Analytical aerodynamic analysis.

scholarly journals High-order computational fluid dynamics tools for aircraft design

2014 ◽  
Vol 372 (2022) ◽  
pp. 20130318 ◽  
Author(s):  
Z. J. Wang
Keyword(s):  
Fluid Dynamics ◽  
Growth Rate ◽  
Computational Fluid Dynamics ◽  
Fuel Economy ◽  
Aircraft Design ◽  
Aircraft Engine ◽  
Foreseeable Future ◽  
Complex Flows ◽  
Environmental Goals ◽  
Set Up

Most forecasts predict an annual airline traffic growth rate between 4.5 and 5% in the foreseeable future. To sustain that growth, the environmental impact of aircraft cannot be ignored. Future aircraft must have much better fuel economy, dramatically less greenhouse gas emissions and noise, in addition to better performance. Many technical breakthroughs must take place to achieve the aggressive environmental goals set up by governments in North America and Europe. One of these breakthroughs will be physics-based, highly accurate and efficient computational fluid dynamics and aeroacoustics tools capable of predicting complex flows over the entire flight envelope and through an aircraft engine, and computing aircraft noise. Some of these flows are dominated by unsteady vortices of disparate scales, often highly turbulent, and they call for higher-order methods. As these tools will be integral components of a multi-disciplinary optimization environment, they must be efficient to impact design. Ultimately, the accuracy, efficiency, robustness, scalability and geometric flexibility will determine which methods will be adopted in the design process. This article explores these aspects and identifies pacing items.

Aerodynamic Numerical Simulation in the Process of Car Styling

2009 ◽  
Vol 16-19 ◽  
pp. 862-865 ◽  
Author(s):  
Ying Chao Zhang ◽  
Zhe Zhang ◽  
Shuang Hu Luo ◽  
Jian Hua Tian
Keyword(s):  
Fluid Dynamics ◽  
Wind Tunnel ◽  
Automotive Industry ◽  
Aerodynamic Drag ◽  
Wind Tunnel Test ◽  
Aerodynamic Design ◽  
Aerodynamic Analysis ◽  
Stability Performance ◽  
Aerodynamic Drag Coefficient ◽  
Velocity Contour

With the development of automotive industry of China, more and more new cars are brought out. Then more and more stylists and engineers will take part in car styling to design new car. In the process of car styling, Car aerodynamics is important to its performance. Especially for more excellent handling and stability performance, more aerodynamic analysis and optimization should been done. At first it was introduced that the process of car styling in this paper. The functions of aerodynamics in the process were indicated. Secondly some ways of aerodynamic analysis were put forward. The first one is wind tunnel test and the second one called virtual wind tunnel test. The virtual wind tunnel test is one of the best modern ways of aerodynamic design which apply in the fields of aerodynamic research widely. It was based on computational fluid dynamics. The details of the virtual wind tunnel test simulation were narrated in this paper. Applying the virtual wind tunnel test aerodynamic drag coefficient, velocity contour and pressure distribution were got. Some advices to reduce aerodynamic drag of the design car were put forward. In one word, it is one simple, effective, convenient and fast way for aerodynamic design in car styling process using virtual wind tunnel test.

Modeling of the Radiation Properties of Flow around the Hypersonic Aircrafts

2014 ◽  
Vol 556-562 ◽  
pp. 1338-1341
Author(s):  
Yang Sheng Zhao ◽  
Xiao Ping Du
Keyword(s):  
Fluid Dynamics ◽  
Boundary Layer ◽  
Computational Fluid Dynamics ◽  
Heat Flow ◽  
Thermal Protection ◽  
Optical Detection ◽  
Fusion Algorithm ◽  
Radiation Properties ◽  
Computational Fluid Dynamics Cfd ◽  
Aerodynamic Parameters

To research the radiation properties of heat flow around the aircrafts’ surface in hypersonic flight, a fusion algorithm to calculate the radiation of flow around hypersonic aircrafts is proposed in this paper. Firstly, the algorithm use the computational fluid dynamics (CFD) to calculate the basic aerodynamic parameters of the aircrafts which are inside boundary layer, such as pressure, density, etc. Subsequently, the model of the radiation of flow around aircrafts is built by using the engineering algorithm. Then, we can build the model of the radiation properties of heat flow around the surface of the aircrafts effectively. The result can reflect the distribution of the radiation of heat flow around surfaces of the aircrafts accurately, and provide data support to study its optical detection and thermal protection.

Sign in / Sign up

Export Citation Format

Share Document