Fundamentals of Aerodynamics
Fundamentals of Aerodynamics
6th Edition
ISBN: 9781259129919
Author: John D. Anderson Jr.
Publisher: McGraw-Hill Education
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Chapter 1, Problem 1.10P

Consider a Lear jet flying at a velocity of 250 m/s at an altitude of 10 km. where the density and temperature are 0.414 kg/m 3 and 223 K, respectively. Consider also a one-fifth scale model of the Lear jet being tested in a wind tunnel in the laboratory. The pressure in the test section of the wind tunnel is 1 atm =1 .01 × 10 5 N/m 2 . Calculate the necessary velocity, temperature. and density of the airflow in the wind-tunnel test section such that the lift and drag coefficients arc the same for the wind-tunnel model and the actual airplane in flight. Note: The relation among pressure, density, and temperature is given by the equation of state described in Problem 1.1.

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