Aerodynamic
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The document analyzes the aerodynamic design of an FSAE vehicle through computational fluid dynamics (CFD) simulations. It examines the pressure distributions and flow trajectories over different parts of the vehicle both with and without components like a diffuser. The addition of a diffuser is shown to reduce pressure underneath the vehicle through "diffuser pumping." While a rear wing increased downforce, it also significantly increased drag due to vortex production. The final configuration with rear spoiler and diffuser produced a 98.19% increase in downforce but only a 13.07% increase in drag compared to the base model without aerodynamics.
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CADmantra Technologies Pvt. Ltd. is one of the best Cad training company in northern zone in India . which are provided many types of courses in cad field i.e AUTOCAD,SOLIDWORK,CATIA,CRE-O,Uniraphics-NX, CNC, REVIT, STAAD.Pro. And many courses
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The document discusses automotive aerodynamics and reducing drag on sport utility vehicles (SUVs). It covers topics like drag force, pressure drag, boundary layer separation, and external devices to reduce drag. The individual project will design modifications to SUVs like rounded edges, extended bumpers, and spoilers. Computational fluid dynamics (CFD) simulations in ANSYS will analyze pressure distributions and aerodynamic drag on different design configurations to lower the drag coefficient and improve performance.
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Aerodynamic drag is one of the main obstacles to decreases the speed of the vehicle and also increases the fuel consumption of the vehicle. Extensive research is undergoing for development of aerodynamically optimized vehicle designs.
The main objective of the project is to increase the fuel efficiency by designing car with different type of aerodynamic attachments like diffuser, spoiler, front and rear wing etc., to reduce drag coefficient.
The car body is modeled using solidworks and analysis is done using Ansys Workbench and Drag coefficient is determined to show decrease in Drag force and increase in fuel Efficiency.
It is observed that Cd for the modified car is lower, compared to the standard car. Cd for the car with front splitter and rear spoiler of angle 19 is found to 0.183 and car with diffuser and vortex generator have drag of 0.211, whereas standard race car have Cd of 0.318. But increases in spoiler angle cd value increases from certain angle.
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This document discusses the applications of aerodynamics in automotive design. It begins by defining aerodynamics and classifying it based on flow environment and behavior. It then outlines key applications in automotive, aerospace, ships/sails, and buildings. The document emphasizes that aerodynamics in automotive design is needed for fuel efficiency, stability at high speeds, noise reduction, and aesthetic styling. It traces the evolution of car aerodynamics from the 1920s to present day designs. The major aerodynamic forces of drag, lift, weight, and thrust are defined. Finally, common aerodynamic devices used in cars like spoilers, wings, diffusers, and NACA ducts are described.
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Study of Aerodynamics
This document discusses aerodynamics and ground effect. It examines how the presence of the ground plane alters airflow around wings and racing cars, reducing induced drag and increasing lift. When flying within one wingspan of the ground, wing tip vortices are disrupted and downwash is reduced. Extremely close to the ground, under 1/4 wingspan, air is compressed between the wing and ground, forming an air cushion that further boosts lift. Racing cars exploit ground effect by using inverted wings to increase downforce without adding weight. The study of aerodynamics has applications for aircraft, wind tunnels, and high-speed ground vehicles.
Modification of airflow around a FSAE Race car using sidepods to increase the...
Aerodynamics pertaining to vehicles focuses on improving the drive-ability of the vehicle while also reducing
losses due to air drag. This paper focuses on maximizing the cornering performance of the formula student race car with
slight modifications to the airflow around the vehicle and meagre addition of weight. The undertray produces downloads
by altering the velocity of air flowing underneath it. The sidepods act to reduce flow velocity above the undertray, thus
increasing the pressure above it. This leads to an increased pressure difference over the surface of the undertray which
translates to increase in downforce. The car is able to have a 10% decrease in lap times on a 500m racetrack.
Effect OF DRAG CO-EFFICIENT ON THE aerodynamic PERFORMANCE OF THE VEHICLE
1) The document discusses the effect of drag coefficient on vehicle aerodynamic performance and various methods to reduce aerodynamic drag.
2) It outlines computational fluid dynamics (CFD) simulations conducted on vehicle models with and without vortex generators to analyze their effect on drag coefficient.
3) The results show that the model with vortex generators had lower drag and lift coefficients than the baseline model, indicating vortex generators can effectively reduce aerodynamic drag.
Design of Rear wing for high performance cars and Simulation using Computatio...
The performance of a sports car is not only limited to its engine power but also to aerodynamic properties of the car. By decreasing the drag force it is possible to reduce the engine power required to achieve same top speed thus decreasing the fuel requirement. The stability of a sports car is considerably important at high speed. The provision of a rear wing increases the downforce thus reducing the rear axle lift and provides increased traction. In this study an optimum rear wing is designed for the high performance car so as to decrease drag and increase downforce. The CAD designed baseline model with or without rear wing is being analyzed in computational fluid dynamics software. The lift and drag coefficient are calculated for all the design thus an optimum rear wing is designed for the considered baseline model.
Aerodynamics effectonformulaonecarcfd rajkamal
This document discusses the aerodynamic effects on a Formula One car using computational fluid dynamics (CFD). It begins by explaining how downforce is important for Formula One cars to provide traction during turns. It then discusses how wings, spoilers, and other components are designed and oriented to produce downforce. The document focuses on studying the effect of dimples on the front wing surface to improve downforce. CFD analysis was conducted on front wing models with and without dimples. The results showed that dimples increased downforce by an average of 15% and improved the lift to drag ratio.
58.Aerodynamics-in-Cars. report ppt.ppt
The document discusses aerodynamics in cars. It defines key aerodynamic terms like drag, lift, and downforce. It explains how aerodynamic principles like frontal area and drag coefficient affect a car's performance. The document also discusses how car designers use computational fluid dynamics software and aerodynamic devices to reduce drag and optimize airflow over different parts of the vehicle. The goal is to achieve maximum fuel efficiency through improved aerodynamics.
IRJET- Design and Simulation of Aerodynamic Wings of Formula One Racing Car
This document describes the design and simulation of aerodynamic wings for a Formula One racing car. It begins with introductions to aerodynamics concepts and how they apply specifically to automotive design. The document then details the design of airfoils used for the wings in Solidworks software. Simulations are run on the front and rear wing designs to analyze forces, pressures, temperatures, velocities and other parameters to evaluate wing performance in producing downforce and drag. The simulations indicate the front wing design produces over 1600N of downforce and around 600N of drag, while meeting other analysis criteria.
Vehicle aerodynamics and refinements ppt.pptx
This document discusses vehicle aerodynamics and refinements. It covers topics such as aerodynamic forces like drag, drag reduction techniques, stability in crosswinds, noise reduction, underhood ventilation, and cabin ventilation. It provides details on each topic with sections on things like the sources of drag, techniques to reduce drag, the impact of crosswinds on stability, the main sources of aerodynamic noise, optimizing underhood airflow, and designing effective cabin ventilation systems.
CFD Analysis of Delta Winged Aircraft – A Review
This document reviews computational fluid dynamics (CFD) analysis that has been conducted on delta wing aircraft and airfoils with surface modifications like dimples. Several studies are summarized that used CFD to analyze how dimples affect lift and drag on airfoils at various angles of attack. Dimples function similarly to vortex generators by creating vortices that delay flow separation and reduce pressure drag. Researchers have found that dimples can increase an aircraft's aerodynamic performance characteristics and maneuverability by reducing drag and stall. The document reviews multiple studies that analyzed different dimple shapes and configurations on symmetric and asymmetric airfoil profiles.
J012468388
This document summarizes an experimental investigation of pressure distribution over a NACA 6321 flat bottom aerofoil with and without ground effect at various angles of attack and height-chord ratios. Wind tunnel experiments were conducted to measure pressure distributions with smooth and rough ground surfaces at different heights. Results showed that pressure coefficients increased under ground effect compared to free flight, and the rough surface produced higher values than the smooth surface. Lift decreased but lift-to-drag ratio increased under ground effect due to chord-dominated ground effect for the low aspect ratio model. The results provide insight into aerofoil behavior close to the ground for ground effect vehicles.
The Effect of Orientation of Vortex Generators on Aerodynamic Drag Reduction ...
One of the main reasons for the aerodynamic drag in automotive vehicles is the flow separation
near the vehicle’s rear end. To delay this flow separation, vortex generators are used in recent vehicles. The
vortex generators are commonly used in aircrafts to prevent flow separation. Even though vortex generators
themselves create drag, but they also reduce drag by delaying flow separation at downstream. The overall effect
of vortex generators is more beneficial and proved by experimentation. The effect depends on the shape,size and
orientation of vortex generators. Hence optimized shape with proper orientation is essential for getting better
results.This paper presents the effect of vortex generators at different orientation to the flow field and the
mechanism by which these effects takes place.
Aerodynamic analysis and optimization of wind deflector in a Commercial load ...
In the field of commercial goods transport, trucks have an important place. One of the main problems faced by truck manufacturers is the Air resistance associated with the highway running. Since trucks have a large frontal area and the presence of a trailer also leads to the truck experiencing significant resistance which has to be overcome. This can be reduced through the use of wind deflectors. A well-designed wind deflector can reduce wind resistance to a certain extent. Optimizing the angle of the wind deflector also causes reduced drag force acting on the vehicle, thereby reducing the fuel intake. Here the initial drag of 2050 N is reduced to 1688.453 N using a 1.75 m wind deflector at 45 degree angle resulting in the reduction of drag by 17.6%.
R130301114118
This document summarizes an aerodynamic analysis of a car model conducted using computational fluid dynamics (CFD) software to reduce drag force. The original Swift Dzire car model and two modified models - a "fastback" design with a sloped rear and a model with a rear spoiler - were simulated at 144 km/hr. The original model had a drag coefficient of 0.375. The fastback design had a lower drag coefficient of 0.335 due to delayed flow separation at the rear. The spoiler model had an even lower drag coefficient of 0.35, as the inverted wing spoiler produced downward force to increase traction at high speeds. CFD analysis provided insight into pressure and velocity contours to understand
AUTOMOTIVE AERODYNAMICS
This document discusses automotive aerodynamics and provides an overview of key concepts. It defines aerodynamics as the study of moving air and its effects on objects in motion. Some key aerodynamic principles for vehicles are explained, including lift, thrust, weight, and drag. The document also discusses downforce, aerodynamic devices used in cars like wings and spoilers, and methods of aerodynamic analysis including wind tunnels and software. It emphasizes that improving a vehicle's aerodynamics through design can significantly increase its fuel efficiency.
Design modification on Indian Road Vehicles to Reduce Aerodynamic Drag
Reducing vehicle fuel consumption has become one of the most important issues in recent years. Aerodynamic drag contributes to 50-60% of fuel consumption in trucks on highways. Vehicle aerodynamic performance is mainly determined by drag coefficient, which directly affects engine requirements and fuel consumption. It’s well known that drag changes in a crosswind compared with a condition without a crosswind, and that the change depends on the vehicle shape. Pressure drag, a major drag for trucks as they run at lower speeds is produced by the shape of the object. Therefore, addition of some components can suffice the need. The vehicle has been designed by using Catia and then analysed with CFD. The values are compared and the resultant drag reduction is calculated.
Dissertation Poster
This document discusses downforce in aerodynamics and its importance in Formula 1 racing. Downforce creates additional weight pushing a vehicle onto the track, allowing for increased cornering speeds without slipping. Though downforce improves cornering, it also creates excess drag slowing vehicles on straights. Testing of a new dual-element rear wing is expected to increase downforce by up to 15% without significant change to drag. Further CFD analysis and wind tunnel testing will provide more accurate performance results of the new wing design.
Study of Flow Over Supercritical Airfoil and it’s Comparison with NACA Airfoil
This document discusses and compares supercritical airfoils to conventional NACA airfoils. It was created in the 1960s by Dr. Richard Whitcomb to reduce transonic drag on aircraft cruising near the speed of sound. Supercritical airfoils have an inverted shape with a flat upper surface and curved lower surface, delaying shockwave formation. Computational fluid dynamics analysis shows supercritical airfoils produce weaker shockwaves at higher speeds than NACA airfoils, reducing drag. Today, nearly all transonic aircraft use supercritical airfoils to improve efficiency.
Aerodynamic Study about an Automotive Vehicle with Capacity for Only One Occu...
The presented study describes the aerodynamic behavior of a compact, single occupant, automotive vehicle. To
optimize the aerodynamic characteristics of this vehicle, a flow dynamics study was conducted using a virtual
model. The outer surfaces of the vehicle body were designed using Computer Aided Design (CAD) tools and its
aerodynamic performance simulated virtually using Computational Fluid Dynamics (CFD) software. Parameters
such as pressure coefficient (Cp), coefficient of friction (Cf) and graphical analysis of the streamlines were used
to understand the flow dynamics and propose recommendations aimed at improving the coefficient of drag (Cd).
The identification of interaction points between the fluid and the flow structure was the primary focus of study to
develop these propositions. The study of phenomena linked to the characteristics of the model presented here,
allowed the identification of design features that should be avoided to generate improved aerodynamic
performance.
seminar report
The document analyzes the effect of adding dimples to the surface of an airfoil wing. It discusses how dimples can delay flow separation and transition the boundary layer from laminar to turbulent, reducing pressure drag. The study models a wing with and without dimples using design software to analyze lift and drag at different angles of attack. The results show that a wing with dimples has an increased critical angle of stall and variations in lift and drag compared to a smooth wing. Future work could include building prototypes to validate the numerical analysis.
Cfd study of formula 1 shark fins effect on the aerodynamic performance and ...
Cfd study of formula 1 shark fins effect on the aerodynamic performance and ...Alejandro García Osorio
A small research carried out as a part of one of my MSc modules, focused on analysing the impact of these "polemic"
devices over the aerodynamic performance of the rear wing and general stability of a F1 racing car.Similar to Aerodynamic (20)
Modification of airflow around a FSAE Race car using sidepods to increase the...
Modification of airflow around a FSAE Race car using sidepods to increase the...
Effect OF DRAG CO-EFFICIENT ON THE aerodynamic PERFORMANCE OF THE VEHICLE
Effect OF DRAG CO-EFFICIENT ON THE aerodynamic PERFORMANCE OF THE VEHICLE
Design of Rear wing for high performance cars and Simulation using Computatio...
Design of Rear wing for high performance cars and Simulation using Computatio...
IRJET- Design and Simulation of Aerodynamic Wings of Formula One Racing Car
IRJET- Design and Simulation of Aerodynamic Wings of Formula One Racing Car
The Effect of Orientation of Vortex Generators on Aerodynamic Drag Reduction ...
The Effect of Orientation of Vortex Generators on Aerodynamic Drag Reduction ...
Aerodynamic analysis and optimization of wind deflector in a Commercial load ...
Aerodynamic analysis and optimization of wind deflector in a Commercial load ...
Design modification on Indian Road Vehicles to Reduce Aerodynamic Drag
Design modification on Indian Road Vehicles to Reduce Aerodynamic Drag
Study of Flow Over Supercritical Airfoil and it’s Comparison with NACA Airfoil
Study of Flow Over Supercritical Airfoil and it’s Comparison with NACA Airfoil
Aerodynamic Study about an Automotive Vehicle with Capacity for Only One Occu...
Aerodynamic Study about an Automotive Vehicle with Capacity for Only One Occu...
Cfd study of formula 1 shark fins effect on the aerodynamic performance and ...
Cfd study of formula 1 shark fins effect on the aerodynamic performance and ...
Aerodynamic
- 1. AERODYNAMIC JUNE 2016ANDREW MICALLEF D E S I G N A N D A N A L Y S I S O F A N F S A E V E H I C L E SKUDERIJA DINAMIKA Submitted to the Institute of Engineering and Transport in partial fulfilment of the requirements for the BEng (Hons.) In Mechanical engineering (Plant).
- 2. PRESSURE DISTRIBUTION OVER TOP SIDE OF VEHICLE The following illustration below depicts the pressure distribution along the top side of the vehicle. Relative pressure was used to indicate were the vortices occurred along the vehicle, and the effects of having a reduction in static pressures along various parts of the vehicle
- 3. PRESSURE DISTRIBUTION OVER BOTTOM SIDE OF VEHICLE (WITHOUT DIFFUSER) The effects of high pressures indicate that a flow separation region is being created at several points throughout the under tray, this induces drag and disrupts downforce production. The low pressure regions indicate flow attachment regions, to which the flow is laminar and the effectiveness of such a component would be much higher.
- 4. PRESSURE DISTRIBUTION OVER TOP SIDE OF VEHICLE (INCLUDING DIFFUSER) It could be seen from the green marked section shown in the figure below, that the relative pressure underneath the vehicle has been effectively reduced. The effect caused when using a efficient diffuser is known as 'Diffuser Pumping'.
- 5. CFD FLOW TRAJECTORIES UNDERNEATH THE VEHICLE It was noted that a large wake (the turbulence region inside the vortex behind an object) was being produced at the back side of the vehicle, which was causing considerable amount of drag production. One of the contributing factors was due to having a diffuser angle of 0°. The only effect of any aerodynamic ‘advantage’ of producing a degree of downforce to be seen in this case is the ‘ground effect’ phenomenon.
- 6. SIDE POD ANALYSIS Cut plot visualizations including velocity vectors (arrows which point out the behaviour of flow according to the specified section), were made to see the effects of flow at the entry region of the side pod (the inlet area). A range of static pressure fluctuations was noted throughout this analysis.
- 7. REAR WING EFFECTS Although the effects of the rear wing were significant to the production in downforce, the drag produced by the vehicle increased drastically. one of the main contributes was the production of vortices.
- 8. FINAL CONFIGURATION When the vehicle containing the rear spoiler and the diffuser was compared to the first experiment, having the vehicle without any aerodynamic components, the CFD simulations showed a 98.19% increase in downforce production, whilst a 13.07% increase in drag was produced.