The effects of ground simulation on tractor-trailer combinations

  1. Get@NRC: The effects of ground simulation on tractor-trailer combinations (Opens in a new window)
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Journal titleSAE International Journal of Commercial Vehicles
Pages510521; # of pages: 12
SubjectAutomotive models; Boundary layer suction; Cross sectional area; Ground motions; National Research Council; Simulation systems; Test sections; Typical model; Automobiles; Commercial vehicles; Reynolds number; Software testing; Tractors (agricultural); Tractors (truck); Truck trailers; Wheels; Wind tunnels; Computer simulation
AbstractThe 9-meter wind tunnel of the National Research Council (NRC) of Canada is equipped with a boundary layer suction system, center belt and wheel rollers to simulate ground motion relative to test articles. Although these systems were originally commissioned for testing of full-scale automotive models, they are appropriately sized for ground simulation with half-scale tractor-trailer combinations. The size of the tunnel presents an opportunity to test half-scale commercial vehicles at full-scale Reynolds numbers with a model that occupies 3% of the test section cross-sectional area. This study looks at the effects of ground simulation on the force and pressure data of a half-scale model with rotating tractor wheels. A series of model changes, typical of a drag reduction program, were undertaken and each configuration was tested with both a fixed floor and with full-ground simulation to evaluate the effects of this technology on the total and incremental drag coefficients. The question was whether ground simulation affected predictions of the drag change due to typical model changes. Effects of the ground simulation were further considered by employing wheel rotation or the center belt alone. This was undertaken to determine whether a simplified ground simulation system would suffice for commercial vehicle testing. Copyright © 2013 SAE International.
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AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270696
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Record identifier3ade8da1-61b0-4fa8-8495-62ecda3d2e32
Record created2014-02-17
Record modified2016-05-09
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