A road haulage truck has an approximate rectangular frontal area 2.5 m wide by 3.8 m high. To investigate the drag on the truck, a one – fifth scale model is to be tested in a wind tunnel. We can assume that the density and viscosity of the air are the same for the model as for the full size truck. If the truck travels at 120 km/h, what is the appropriate air speed for the model in the wind tunnel?

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Q: Show by dimensional analysis that this leads to the loga rithmic overlap relation (6.28). The…

A: Given DataT=24°Cair Density and kinematic viscosity at 24°C from dataρ=1.225kg/m3ϑ=1.543m2/s

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A: Air: ν1= 1.51×10-5 m2/sV1= 7.5 m/s Water: ν2= 1.00×10-6 m2/sV2= ? m/s Scale model= D2D1=110

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Q: 3. Suppose the drag force on a truck is given by the equation: F = cqv² + c2v where c = 4.80 N and…

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Q: For steady isentropic fl ow, if the density doubles, by whatratio does the static pressure…

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Q: By dimensional analysis, obtain an expression for the drag force (F) on a partially submerged body…

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Q: Back view of a car driving around a curve. Select the direction of each external force acting on the…

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Q: 3. What would be the change in drag force exerted on a spherical spacecraft (Diameter-5m) travelling…

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Q: 1. The aerodynamic drag of a Formula 1 car is to be predicted at a speed of 100 km/hr in an…

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Q: P6.2 A 1:80 scale model of an aircraft was tested in air at 20C°moves with speed 40m/s a- What is…

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Q: A small, axisymmetric, low-speed wind tunnel is built to calibrate hot wires. The diameter of the…

A: At 60°F The properties of air ρ=0.07489 lbm/ft3μ=1.23×10-5 lbm/ft.s The speed of air, v=5 ft/s…