Imperial College London
Portrait Picture

Prof Francesco Montomoli

Faculty of Engineering, Department of Aeronautics

Professor in Computational Aerodynamics
 
 
 
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Contact

 

+44 (0)20 7594 5151f.montomoli Website

 
 
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Location

 

215City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ahlfeld:2019:10.1177/0954407019835315,
author = {Ahlfeld, R and Ciampoli, F and Pietropaoli, M and Pepper, N and Montomoli, F},
doi = {10.1177/0954407019835315},
journal = {Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering},
title = {Data-driven uncertainty quantification for Formula 1: Diffuser, wing tip and front wing variations},
url = {http://dx.doi.org/10.1177/0954407019835315},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - © IMechE 2019. This work introduces a new uncertainty quantification method to better deal with scarce data and long simulation run times in Formula 1 design. Race cars are produced in low quantities and for maximum performance. Thus, their designing process is characterised by manufacturing data shortage and complex Computational Fluid Dynamics simulations with long run times. Their car aerodynamics is subject to many random variables that introduce uncertainty into the down-force and drag performance, such as variations in ride height, front wing direction and pitch angle. To accurately predict the car performance during a race, it is important to study the effect of these random variables. This assessment cannot be performed with the standard deterministic Computational Fluid Dynamics approaches used in Formula 1. Even with regard to stochastic approaches, no efficient method has so far been suggested that addresses the problem of data scarcity. The reason for this is that most efficient uncertainty quantification methods fit probability distributions to the scarce data. It is shown in this work that probability distribution fitting can create a significant error using a simple two-dimensional diffuser example. Subsequently, the use of a new data-driven Polynomial Chaos method and its sparse multi-dimensional extension is suggested and demonstrated for Formula 1 to reduce such errors. This method allows to avoid distribution fitting because it is based on pure data. SAMBA’s general formulation also makes it easier to combine any possible inputs within a sparse description for problems with many variables. SAMBA is applied to two realistic car three-dimensional Computational Fluid Dynamics simulations: a NACA 0012 tip wing and the front part of a Formula 1 car. The probabilistic variations of the lift and drag of these two configurations are calculated using SAMBA and shown to be significant.
AU  - Ahlfeld,R
AU  - Ciampoli,F
AU  - Pietropaoli,M
AU  - Pepper,N
AU  - Montomoli,F
DO  - 10.1177/0954407019835315
PY  - 2019///
SN  - 0954-4070
TI  - Data-driven uncertainty quantification for Formula 1: Diffuser, wing tip and front wing variations
T2  - Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
UR  - http://dx.doi.org/10.1177/0954407019835315
ER  -
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