International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
DESIGN OPTIMIZATION AND CFD ANALYSIS OF CAR USING ACTIVE MOUNTING TO REDUCE DREG COEFFICIENT AND REDUCE LIFT TO SLEEP OF CAR AT HIGHER SPEED RAJYAGURU PRANAV 1,TANDEL HITESH 2,KISHAN VAGHELA 3, 123student-Vadodara
Institute Of Engineering -Vadodara-India
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Abstract: An analytical study on air flow which effects and resulting dynamics on the car is presented. The research deal with Computational Fluid Dynamic analysis and simulation to maximize down force and minimize drag during high speed of the car. Using ANSYS FLUNT software and mentoring provided by ANSYS , the results employs efficient discretization techniques and real loading conditions to study down force on rear wing of the car with drag generated by all active mounted surfaces. Wing and external surface under high velocity runs of the car are presented. Optimization of wing direct angle of attack and geometry modifications on surfaces of the car are performed to enhance down force and reduce drag for higher degree of stability and to control during operation. Moreover to ensure more stability active aerodynamic spoiler which can adjust its height and its angle of attack according to speed. So the aim of research to find best height at which maximum down force and air flow separate ,so that car body can get high level of stability . And another factor is angle of attack at which highest value of down force we get . Keywords: ACTIVE AERODYNAMICS , SPOILER , DOWN FORCE , STABILITY , ANSYS ( FLUENT ) , CATIA V6
1. INTRODUCTION 1.1 Introduction to active aerodynamics Active aerodynamics is a combination of a various -stage adjustable rear spoiler. The spoiler lip is protected. In stage two (Speed), after 120 km/h, rear spoiler are partially extended. This helps to ensure a considerable level of stability, a low drag coefficient and enables a high top speed rear spoilers are now fully extended. Also, in this position, the rear spoiler is tilted by up to 15 degrees.
1.2 COMPUTIONAL FLUID DYNAMICS Computational fluid dynamics is the transformation of a situation to the mathematical model with governing equation. This whole equation are looped with other equations which are depend on another equations and solved together however, this calculation is very tough by manual source so it is calculated by metleb, ansys, simscale and various cfd soft wear . In background in cfd the equations of mass, momentum and energy also for drag and lift called navier stock equation . so that cfd is called combination of computer science, mathematics, physics.in our research we don’t require any heat transfer or any thermal turm we only interested in air streamlines .
1.2 MODELLING The 3-d model is done using blue print of Porsche 911 turbo .Automobile body have lots of sharp curves and edges. so that it is very difficult to make solid model . By using of surface modeling automotive body can easily done and results will be perfect and can be implemented in real word and also used by automobile company.
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