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Fluid-Structure Interaction Analysis of a Competitive Car during Brake-in-Turn Manoeuvre

Author

Listed:
  • Jakub Broniszewski

    (Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warszawa, Poland
    These authors contributed equally to this work.)

  • Janusz Ryszard Piechna

    (Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 00-665 Warszawa, Poland
    These authors contributed equally to this work.)

Abstract

The relationship between the presented work and energy conservation is direct and indirect. Most of the literature related to energy-saving focuses on reducing the aerodynamic drag of cars, which typically leads to the appearance of vehicle motion instabilities at high speeds. Typically, this instability is compensated for by moving aerodynamic body components activated above a certain speed and left in that position until the vehicle speed drops. This change in vehicle configuration results in a significant increase in drag at high velocities. The presented study shows a fully coupled approach to fluid–structure interaction analyses of a car during a high-speed braking-in-turn manoeuvre. The results show how the aerodynamic configuration of a vehicle affects its dynamic behaviour. In this work, we used a novel approach, combining Computational Fluid Dynamics (CFD) analysis with the Multibody Dynamic System. The utilisation of an overset technique allows for car movement in the computational domain. Adding Moving Reference Frame (MRF) to this motion removes all restrictions regarding car trajectory and allows for velocity changes over time. We performed a comparative analysis for two aerodynamic configurations. In the first one, a stationary rear airfoil was in a base position parallel to a trunk generating low drag. No action of the driver was assumed. In the second scenario, brake activation initiates the rotation of the rear airfoil reaching in 0.1 s final position corresponding to maximum aerodynamic downforce generation. Also, no action of the driver was assumed. In the second scenario, the airfoil was moving from the base position up to the point when the whole system approached its maximum downforce. To determine this position, we ran a separated quasi-steady analysis in which the airfoil was rotating slowly to avoid transient effects. The obtained results show the importance of the downforce and load balance on car stability during break-in-turn manoeuvres. They also confirm that the proposed methodology of combining two independent solvers to analyse fluid–structure phenomena is efficient and robust. We captured the aerodynamic details caused by the car’s unsteady movement.

Suggested Citation

  • Jakub Broniszewski & Janusz Ryszard Piechna, 2022. "Fluid-Structure Interaction Analysis of a Competitive Car during Brake-in-Turn Manoeuvre," Energies, MDPI, vol. 15(8), pages 1-16, April.
  • Handle: RePEc:gam:jeners:v:15:y:2022:i:8:p:2917-:d:794833
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    References listed on IDEAS

    as
    1. Mattia Basso & Carlo Cravero & Davide Marsano, 2021. "Aerodynamic Effect of the Gurney Flap on the Front Wing of a F1 Car and Flow Interactions with Car Components," Energies, MDPI, vol. 14(8), pages 1-15, April.
    2. Janusz Ryszard Piechna & Krzysztof Kurec & Jakub Broniszewski & Michał Remer & Adam Piechna & Konrad Kamieniecki & Przemysław Bibik, 2022. "Influence of the Car Movable Aerodynamic Elements on Fast Road Car Cornering," Energies, MDPI, vol. 15(3), pages 1-28, January.
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    Cited by:

    1. Krzysztof Kurec, 2022. "Numerical Study of the Sports Car Aerodynamic Enhancements," Energies, MDPI, vol. 15(18), pages 1-19, September.
    2. Maciej Szudarek & Adam Piechna & Janusz Piechna, 2022. "Feasibility Study of a Fan-Driven Device Generating Downforce for Road Cars," Energies, MDPI, vol. 15(15), pages 1-27, July.
    3. Krzysztof Wiński & Adam Piechna, 2022. "Comprehensive CFD Aerodynamic Simulation of a Sport Motorcycle," Energies, MDPI, vol. 15(16), pages 1-27, August.

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