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Computational Analysis of Pitch Sensitivity for a Concept Race Car
Technical Paper
2022-01-5065
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
Automotive Technical Papers
Language:
English
Abstract
The present numerical study investigates the design and analysis of a concept
model Le Mans Grand Touring Prototype (LMGTP) car. Through analysis, aerodynamic
pitch sensitivity and related factors are found to be detrimental to the
straight-line stability of these high-speed race cars. Simulations are carried
out on a commercial Computational Fluid Dynamics (CFD) tool for varying pitch
angles of the car from −1° to +2.5°. For each pitch angle, steady-state pressure
contours, velocity contours, and streamlines are presented. Additionally,
coefficients and force values of lift and drag are calculated with the k-omega
turbulence model implemented. Obtained numerical results are validated via Ahmed
Body studies reported in the literature, and an average error deviation of
1.013% is exhibited. It is observed that lift force at the front axle increases
with increasing pitch angles, leading to reduced pitch stability. At a peak of
2.5° pitch angle, the destabilizing lift force peaks at 1872 N, with the trend
showing potential for front axle liftoff. The obtained results are validated
with the aerodynamic stability derivative using MATLAB Simulink. A strong
correlation is observed for CFD results with respect to theoretical aerodynamic
pitch stability derivative calculations with peak nose-up conditions (+2.5°)
indicating the highest levels of instability.
Authors
- Satheesh Anbalagan - Vellore Institute of Technology
- Chirag Deepak - School of Mechanical Engineering, Vellore Institute of Techn
- Kartik Virmani - School of Mechanical Engineering, Vellore Institute of Techn
- Tanishq Madhogaria - School of Mechanical Engineering, Vellore Institute of Techn
- Rathan Ramesh - School of Mechanical Engineering, Vellore Institute of Techn
- Tharun M.V. Narendhra - School of Mechanical Engineering, Vellore Institute of Techn
- Padmanathan Panneerselvam - School of Mechanical Engineering, Vellore Institute of Techn
Topic
Citation
Anbalagan, S., Deepak, C., Virmani, K., Madhogaria, T. et al., "Computational Analysis of Pitch Sensitivity for a Concept Race Car," SAE Technical Paper 2022-01-5065, 2022, https://doi.org/10.4271/2022-01-5065.Also In
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