A one-third scale model of a car is to be tested in a wind tunnel. The conditions of the actual
Question:
A one-third scale model of a car is to be tested in a wind tunnel. The conditions of the actual car are V = 75 km/h and T = 0°C and the air temperature in the wind tunnel is 20°C.
The properties of air at 1 atm and 0°C: ρ = 1.292 kg/m3, ν = 1.338 × 10–5 m2/s.
The properties of air at 1 atm and 20°C: ρ = 1.204 kg/m3, ν = 1.516 × 10–5 m2/s.
In order to achieve similarity between the model and the prototype, the wind tunnel velocity should be
(a) 255 km/h
(b) 225 km/h
(c) 147 km/h
(d) 75 km/h
(e) 25 km/h
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Related Book For 
Fluid Mechanics Fundamentals And Applications
ISBN: 9780073380322
3rd Edition
Authors: Yunus Cengel, John Cimbala
Question Details
Chapter #
7- DIMENSIONAL ANALYSIS AND MODELING
Section: Problems
Problem: 131
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Question Posted: September 17, 2023 01:09:12