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B. E. PROJECT SEMINAR ON DRAG FORCE ANALYSIS OF CAR SUBMITTED BY

B. E. PROJECT SEMINAR ON DRAG FORCE ANALYSIS OF CAR SUBMITTED BY ASHWIN S. TEMBHURNEY ABHISHEK A.GOMASE RAVISHEK KUMAR ABHISHEK KUMAR GUIDED BY Prof. R. M. METKAR 2005-2006

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B. E. PROJECT SEMINAR ON DRAG FORCE ANALYSIS OF CAR SUBMITTED BY

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  1. B. E. PROJECT SEMINAR ON DRAG FORCE ANALYSIS OF CAR SUBMITTED BY ASHWIN S. TEMBHURNEY ABHISHEK A.GOMASE RAVISHEK KUMAR ABHISHEK KUMAR GUIDED BY Prof. R. M. METKAR 2005-2006 DEPARTMENT OF MECHANICAL ENGINEERING G. H. RAISONI COLLEGE OF ENGINEERING, NAGPUR.

  2. CONTENTS • INTRODUCTION • OBJECTIVE • MOTIVATION • EFFECT OF DRAG • METHODOLOGY • DRAG COMPONENTS • HOW TO CALCULATE DRAG FORCE • WORK PROGRESS AS ON DATE • TENTATIVE BUDGET • CONCLUSION • BIBLIOGRAPHY

  3. INTRODUCTION • When a road vehicle moves through air, its body will experience aerodynamic forces and moments. • The body experiences a force along the direction of the moving body called drag and a vertical force perpendicular to the drag called lift. • It is generated by interaction & contact of a solid with a fluid. • It is generated by the difference in velocity between the object and fluid.

  4. OBJECTIVES • To compute the drag force and moments on Low Mass Vehicle (LMV) by using Computational Fluid Dynamics. • To reduce the drag force by modifying the body shape without changing the original structural frame of the vehicle. • To apply the techniques obtained from this project to the other problems such as heavy vehicles, Aircrafts.

  5. MOTIVATION • Designing a vehicle with a minimized Drag resistance provides economical and performance advantages. • Decreased resistance to forward motion allows higher speeds for the same power output. • The main motivation for reducing drag resistance is then: • Fuel consumption reduction • Performance increasing

  6. EFFECT OF DRAG

  7. METHODOLOGY

  8. UNDERBODY DRAG

  9. DRAG COMPONENTS

  10. HOW TO CALCULATE DRAG FORCE • The Drag force value for a moving vehicle is given by the following expression. DF =1/2 A ρ CD V2 where , CD is the drag coefficient A is the projected frontal area of the vehicle ρ is the density of air V is the speed of the vehicle relatively to the air

  11. WORK IN PROGRESS AS ON DATE • VARIOUS DATA RELATED TO THE TOPIC HAVE BEEN COLLECTED. • 2D SKETCH OF MARUTI 800 RELATED TO DRAG FORCE IS STUDIED. • CHANGE IN DRAG FORCE DUE TO CHANGE IN THE CONTACT SURFACES HAVE BEEN STUDIED.

  12. TENTATIVE BUDGET • APPROXIMATE BUDGET WOULD BE ABOUT Rs.7000-15000/-

  13. CONCLUSION • Smooth vehicle shape, rounded corners. • Tapered rear end. • Minimized body seams. • Substitution of rear view mirrors with Cameras. • Smooth underbody.

  14. BIBLIOGRAPHY • Project: Alexander Diehl, José Nuno Lopes, Rui Miranda, Christoffer Mursu Simu, John Viji, Department of Thermo and Fluid Dynamics, Chalmers University of Technology, “Road Vehicle and Aerodynamic Design”. • Paper: Inchul Kim and Xin Geng, Department of mechanical Engineering, University of Michigan, “Optimization of body shape through computation of aerodynamic forces on low mass vehicle”. • http://web.syr.edu/~smdemar/rocketdrag.html

  15. THANK YOU

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