2134/15959 Joshua Fuller Joshua Fuller Matt Best Matt Best Nikhil J.I. Garrett Nikhil J.I. Garrett Martin Passmore Martin Passmore The importance of unsteady aerodynamics to road vehicle dynamics Loughborough University 2014 Unsteady aerodynamics Vehicle dynamics Driver model Crosswinds Vehicle handling Mechanical Engineering Engineering not elsewhere classified 2014-10-01 14:06:02 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/The_importance_of_unsteady_aerodynamics_to_road_vehicle_dynamics/9224084 This paper investigates the influence that different unsteady aerodynamic components have on a vehicle's handling. A simulated driver and vehicle are subject to two time-dependent crosswinds, one representative of a windy day and the second an extreme crosswind gust. Initially a quasi-static response is considered and then 5 additional sources of aerodynamic unsteadiness, based on experimental results, are added to the model. From the simulated vehicle and driver, the responses are used to produce results based on lateral deviation, driver steering inputs and also to create a ‘subjective’ handling rating. These results show that the largest effects are due to the relatively low frequency, time-dependent wind inputs. The additional sources of simulated unsteadiness have much smaller effect on the overall system and would be experienced as increased wind noise and reduced refinement rather than a worsening of the vehicle's handling