Design for Wind Tunnel Testing of Scaled Model by CFD Method

The numerical investigations presented in this paper deal with wind tunnel testing scheme design for 1/4 scaled MIRA model including supporting system. Based on the structure of aerodynamic and aero-acoustic full scale wind tunnel, using computational fluid dynamics (CFD), focus on MIRA model and supporting system, the drag force of scaled models and supporting system were calculated. By comparing with the wind tunnel testing results and drag force coefficient of reference, it is certain that the wind tunnel testing scheme is available and effective and that the value calculated by CFD is in good agreement with experiments.

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Measurement of Drag Force Acting on a Linke Hofmann Busch Design Railway Coach Through Wind Tunnel Testing

Journal of The Institution of Engineers (India) Series C ◽

10.1007/s40032-020-00598-z ◽

2020 ◽

Author(s):

T. Murugan ◽

A. Abubakkar

Keyword(s):

Wind Tunnel ◽

Drag Force ◽

Wind Tunnel Testing ◽

Tunnel Testing

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The application of body scanning, numerical simulations and wind tunnel testing for the aerodynamic development of cyclists

Proceedings of the Institution of Mechanical Engineers Part P Journal of Sports Engineering and Technology ◽

10.1177/1754337120904258 ◽

2020 ◽

pp. 175433712090425

Author(s):

Shian Chi ◽

John Pitman ◽

Tim Crouch ◽

David Burton ◽

Mark Thompson

Keyword(s):

Numerical Simulation ◽

Wind Tunnel ◽

Drag Force ◽

Experimental Studies ◽

Field Testing ◽

Wake Flow ◽

Navier Stokes ◽

Wind Tunnel Testing ◽

Flow Features ◽

Tunnel Testing

The aerodynamic efficiency of an elite cyclist is often evaluated and optimised using either one or a combination of field testing, wind-tunnel testing and numerical simulation. This study focuses on the processes and limitations involved in using a body scan to produce an accurate geometry for input to numerical simulation, with validation through drag comparisons from wind-tunnel tests and vortical wake-flow features reported in previous experimental studies. Transitional Shear Stress Transport Reynolds-Averaged Navier-Stokes simulations based on the scanned geometry were undertaken for a 180 ° half crank cycle at 15 ° increments. The sectional drag force contributions of 23 body subparts are presented, documenting the contribution and variation of each body/cycle component over the cycle. These methods are evaluated and the limitations of the approaches are discussed. The results from the numerical simulation and the wind tunnel measured drag force were very similar, differing by approximately 1%–7% for various crank angles.

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