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Experimental and Computational Analysis of the Aerodynamic Performances of a Maxi-Scooter
Technical Paper
2003-01-0998
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In the last three decades, with the growing concern on environmental impact and with the market demand for safety and lower fuel consumption, aerodynamic development has become a standard part of the automobile design area and it is easy to foresee that this is going to happen very fast also for motorcycles. Furthermore, a new concept of motorcycle called maxiscooter has successfully entered the European market. Maxiscooters represent an evolution of the small size engine scooters (from 50 to 125 cc) that were created in the 50s for city use. This category of motorcycles is aimed to a wealthy and more adult market, which needs a pleasant design, riding comfort and stability at higher speed. On the other hand, such vehicles for city use are passing a critical moment in terms of development of the engines, because of the stricter limits imposed by the environmental regulations and for the consequent and significant effects on performance. Force and moment determination is important for all ground vehicles and becomes more critical as the speed increases. Virtually all aspects that have to do with any sort of air flow in a new vehicle require the help of aerodynamic investigations. As wind tunnel measurements and road tests continue to be the most common and extensively used approach to isolate, reproduce and measure aerodynamic forces and moments, it cannot be sufficient to reach optimal performance. The rapid evolution of computers in terms of electronic data processing and storage and the progress obtained in computational fluid dynamics (CFD), suggest its utilization to support and reduce experimental tests.
This paper presents the aerodynamic performances of a 500 cc scooter determined both experimentally and numerically. The measurements have been made at the University of Perugia wind tunnel and balance facility. Numerical simulations have been performed with a commercial code based on the “lattice technique”, which is an alternative approach to solve fluid dynamics problems, without directly employing Navier-Stokes equations.
Once the code has been adequately validated, detailed pressure and velocity distribution around the vehicle can be predicted by computational simulations. CFD can therefore contribute greatly to better understanding of vehicles aerodynamics.
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Bella, G., Ubertini, S., and Desideri, U., "Experimental and Computational Analysis of the Aerodynamic Performances of a Maxi-Scooter," SAE Technical Paper 2003-01-0998, 2003, https://doi.org/10.4271/2003-01-0998.Also In
References
- Hucho W.H. Aerodynamics of Road Vehicles SAE International fourth 1998
- Cooper K.R. The Effect of Aerodynamics on the Performances and Stability of High Speed Motorcycles Proceedings of the Second AIAA Symposium on Aerodynamics of Sports and Competition Automobiles 1974
- Cooper K.R. The effect of Handlebar Fairings on Motorcycle Aerodynamics SAE Technical Paper 830156 1983
- Ubertini, S. Desideri, U. 2002 Aerodynamic Investigation of a Scooter in the University of Perugia Wind Tunnel Facility” 2002 SAE World Congress , Paper No. 2002-01-0254
- Exa Corp. PowerFLOW user's guide
- Succi S. The lattice Boltzmann equation for fluid dynamics and beyond Clarendon, Oxford 2001
- Galway R.D. A comparison of methods for calibration and use of multi-component strain gauge wind tunnel balances NRC report n°18227 National Research Council of Canada 1980
- Flay RG.J. Vuletich I.J. Development of a Wind Tunnel Test Facility for Yacht Aerodynamic Studies Journal of Wind Engineering and Industrial Aerodynamics 58 231 258 1995
- Taylor N.B. Kuyatt C.E. Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results NIST Technical Note 1297 1994
- SAE Vehicle Aerodynamics Terminology, Recommended Practice SAE J1594 1987
- Doebelin E.O. Measurement Systems Application and Design McGrawHill International Editions Fourth 1990
- Goldstein R.J. Fluid Mechanics Measurements Hemisphere Publishing Corporation 1983
- National Instruments, LABVIEW™ 5.1 1999
- Garry K.P. Wallis S.B. Cooper K.R Fediw A. Wilsden D.J. The Effect on Aerodynamic Drag of the Longitudinal Position of a Road Vehicle Model in a Wind Tunnel Test Section SAE Technical Paper 940414 1994
- Barlow J.B. William H.R. Jr. Pope A. Low-Speed Wind Tunnel Testing John Wiley & Sons Third 1999
- Takagi M. Application of computers to automobile aerodynamics J. Wind Eng. Ind. Aerodyn. 33 419 428
- Kobayashi T. Kitoh K. A review of CFD methods and their application to automobile aerodynamics SAE paper 920338 1992
- Shaw C.T. Predicting vehicle aerodynamics using computational fluid dynamics a user's perspective SAE paper 880455 1988
- Frish U. Hasslacher B. Pomeau Y. Lattice gas cellular automata for the Navier-Stokes equations Phys Rev. lett. 56 1986 1505
- McNamara G. Zanetti G. Use of the Boltzmann equation to simulate lattice-gas automata Phys. Rev. Lett. 61 1988 2332
- Benzi R. Succi S. Vergassola M. Theory and application of the lattice Boltzmann equation Phys. Rep. 222 3 1992 147
- Succi S. Lattice Boltzmann equation: failure or success? Physica A 240 1997 221
- Takada N. Misawa M. Tomiyama A. Fujiwara S. Numerical simulation of two- and three-dimensional two-phase fluid motion by lattice Boltzmann method
- Qian Y.H. Succi S. Orzag S. recent advances in lattice Boiltzmann computing Ann. Rev. Comp. Phys. 3 1995 195
- Takada N. Misawa M. Tomiyama A. Hosokawa S. Simulation of Bubble motion under Gravity by Lattice Boltzmann Method J. of Nuc. Sci. and Tech. 38 5 2001 330
- Cogotti A. 1995 Ground effect simulation for full-scale cars in Pininfarina wind tunnel SAE paper no. 950996
- Howell J. Hickman D. 1997 The influence of ground simulation on the aerodynamics of a simple car model SAE paper no. 970134
- Le Good G.M. et al. A comparison of on-road aerodynamic drag measurements with wind tunnel measurements with wind tunnel data from Pininfarina to MIRA SAE paper no. 980394