This study examined the aerodynamic performance of two human-powered vehicle designs through on-road testing, wind tunnel experiments, and computational fluid dynamics modeling. The results showed that small changes to a vehicle's body shape, extrusions, and accessories can significantly increase aerodynamic drag. Despite assumptions that one vehicle would have less drag, it was found that the first vehicle tested actually had lower drag than the second vehicle. The findings of this study can help optimize the aerodynamic design of future human-powered vehicles.

1. “On-road and Wind Tunnel Aerodynamic
Study of Human Powered Vehicles”
Jadhav Sakshi
Jadhav Sneha
Jadhav Vaibhav
Jagtap Pritesh
Jakhad Ekta
AMRUTVAHINI COLLEGE OF ENGINEERING, SANGAMNER
Presented By:-

2. CONTENT
Abstract
List of Figures
List of Tables
Content
Introduction
Methodology
Results
Conclusion
Refrence

3. ABSTRACT
The aim of the Royal Automotive Club of Victoria
IRACV) Energy Breakthrough annual event is to
provide an opportunity to school students to design
and develop human powered vehicles (HPVs).
The key areas with interest of HPVs are the
significance of aerodynamic design and ways to
improve overall aerodynamics as most HPVs are
designed with minimal or no aerodynamic
consideration.

4. Therefore, the primary objective of this study is
to examine the aerodynamic behaviour of two
production HPVs of variable designs using on-
road, windtunnel experimentations and
Computational Fluid DynamicsICFD} modelling.
The study shows that the aerodynamic efficiency
of vehicle largely depends on external shape
especially the extrusion, gaps and bumps.

5. INTRODUCTION
Human-powered transport can be defined
as that type of transport that only uses the
human muscle power.
Human Powered Vehicle (HPV) is a pedal
powered mode of transportations therefore its
success is measured by the effective transfer
of pedal power to forward motion.

6. Evidence suggests that despite low speeds
aerodynamic drag has a significant effect on
average speed and rider fatigue.
The current study was aimed at understanding
the aerodynamics, and in turn helping to
achieve better efficiency of these vehicles and
increasing the appeal of the HPV.

7. HPV reduces air pollution as it doesn't
require any fuel.
HPV improves human health as it
requires mechanical work thats why it
improves human health.
AIM

8. PROJECT STATEMENT
“On-road and Wind Tunnel Aerodynamic
Study of Human Powered Vehicles”

9. METHODOLOGY
(a) Production Vehicle
for on-road test
Model 1:
(b) Simplified model
used in this study

10. Model 2:
(a) ProductionVehicle (b) Simplified Vehicle

11. Physical Dimensions for HPV1 & HPV2:
Table

12. Casley Fields Track:

13. Simplified HPV model 1 for study:
(a) wind tunnel (b) CFD

14. RESULT
On-road test summery:

15. Comparison of model 1&2:
(a) drag(D) as a function
of wind speeds
(b) drag coefficient (CD) as a
function of wind speeds

16. Velocity vectors around simplified
HPV model 1:

17. Velocity vectors around simplified
HPV model 2:

18. CONCLISION
The magnitude of drag significantly varies with
vehicles physical profiles. Small changes in the body
shape, extrusions and accessories generate
significantly large amount of aerodynamic drag.
Despite assumptions made otherwise, it was found that
HPV I has less drag than HPV 2. The findings of this
study help to develop and refine current vehicles for
the future use in RACV or similar racing events to gain
aerodynamic efficiency.

19. REFERENCE
1]International Transport Forum. Transport Greenhouse Gas
Emissions Trends & Data 201o. Germany; 2010.
2] Alam F, Silva P, Z immer G. Aerodynamic study of Human
Powered Vehicles, Procedia Engineering 2o12,5 4: 9 -13.
3] Zimmer G, Alam F. The E fects of Aerodynamic Design on
Lightweight Human Powered Vehicles. In: The Impact of
Technology on Sports 11, 200 9, p. 125-9
4] Hucho WH. Aerodynamics of Road Vehicles, 4th Edition.
USA: SAE Intermational, 1998.

20. 5] Valkenburg VP, Race car Engineering and Mechanics.
USA, 200 0.
6] Becker M, Dedini FG. Vehicular Dirigibility Study
Applied to Human-Powered Tricycles (HPT). SAE Paper No
982882, USA, 1998.
7] Gross AC, Kyle CR, Malewicki DJ. The aerodynamics of
Human- Powered Land Vehicles. Scientific American i
985:132-152.
8] RACV Energy Breakthrough. Central Goldfields Shire
(2o03, 2008, 2011, 2012) Final results.

21. "Thank You"