2- The aerodynamic drag of a new sports truck is to be predicted at a speed of 50.0 km/h at an air temperature of 25°C. Automotive engineers build a one-sixth scale model of the car to test in a wind tunnel. It is winter and the wind tunnel is located in an unheated building; the temperature of the wind tunnel air is only about 10°C. Determine how fast the engineers should run the wind tunnel in order to achieve similarity between the model and the prototype, if the drag sensor read 80 N fine the drag force exerted on prototype. Properties for air at atmospheric pressure and T= 25 °C, p=1.184kg/cm3 and p=1.849*10^-5kg/m.s, similarity at T=10 °C, p=1.22 kg/cm3 and p=1.792*10^-5kg/m.s. Wind tunnel test section Model FD Moving belt Drag balance
2- The aerodynamic drag of a new sports truck is to be predicted at a speed of 50.0 km/h at an air temperature of 25°C. Automotive engineers build a one-sixth scale model of the car to test in a wind tunnel. It is winter and the wind tunnel is located in an unheated building; the temperature of the wind tunnel air is only about 10°C. Determine how fast the engineers should run the wind tunnel in order to achieve similarity between the model and the prototype, if the drag sensor read 80 N fine the drag force exerted on prototype. Properties for air at atmospheric pressure and T= 25 °C, p=1.184kg/cm3 and p=1.849*10^-5kg/m.s, similarity at T=10 °C, p=1.22 kg/cm3 and p=1.792*10^-5kg/m.s. Wind tunnel test section Model FD Moving belt Drag balance
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.70P
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