This work presents an application of the partially averaged Navier–Stokes (PANS) equations for an external vehicle flow. In particular, the flow around a generic truck cabin is simulated. The PANS method is first validated against experiments and resolved large eddy simulation (LES) on two static cases. As a consequence, PANS is used to study the effect of an active flow control (AFC) on a dynamic oscillating configuration. The oscillation of the model represents a more realistic ground vehicle flow, where gusts (of different natures) define the unsteadiness of the incoming flow. In the numerical study, the model is forced to oscillate with a yaw angle 10 deg > β > –10 deg and a nondimensional frequency St = fW/Uinf = 0.1. The effect of the periodic motion of the model is compared with the quasi-static flow condition. At a later stage, the dynamic configuration is actuated by means of a synthetic jet boundary condition. Overall, the effect of the actuation is beneficial. The actuation of the AFC decreases drag, stabilizes the flow, and reduces the size of the side recirculation bubble.
A Flow Control Study of a Simplified, Oscillating Truck Cabin Using PANS
Mechanics and Maritime Sciences,
Chalmers University of Technology,
Gothenburg 412 96, Sweden
AVL List GmbH,
Graz 8020, Austria
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received August 18, 2017; final manuscript received May 2, 2018; published online June 13, 2018. Assoc. Editor: Jun Chen.
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Minelli, G., Krajnović, S., and Basara, B. (June 13, 2018). "A Flow Control Study of a Simplified, Oscillating Truck Cabin Using PANS." ASME. J. Fluids Eng. December 2018; 140(12): 121101. https://doi.org/10.1115/1.4040225
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