Calculate the values of the Rx for the two parts of Example 17.1 shown below. Boundary layers on flat plates are laminar only up to RX 3.5 105 to 2.8 106. Are these values exceeded for the boundary layers in Example 17.1? Example 17.1. Calculate the boundary-layer thickness for: (a) A point on an airplane wing 2 ft from the leading edge, when the plane is flying 200 mi/h through air. (b) A point 2 ft from the bow of a ship, when the ship is moving 10 mi/h through water. For the airplane and for the ship 8=5. 1.61-10-4 ft²/s-2 ft 200 mi/h 5280 ft/mi h/3600 s = 5.24-10 ft = 0.063 in = 1.60 mm 1.08-10-5 ft²/s-2 ft 10 mi/h 5280 ft/mi- h/3600 s = 6.06 10³ ft=0.073 in = 1.8 mm 8=5. 1/2 1/2

Calculate the values of the Rx for the two parts of Example 17.1 shown below. Boundary layers on flat plates are laminar only up to RX 3.5 105 to 2.8 106. Are these values exceeded for the boundary layers in Example 17.1? Example 17.1. Calculate the boundary-layer thickness for: (a) A point on an airplane wing 2 ft from the leading edge, when the plane is flying 200 mi/h through air. (b) A point 2 ft from the bow of a ship, when the ship is moving 10 mi/h through water. For the airplane and for the ship 8=5. 1.61-10-4 ft²/s-2 ft 200 mi/h 5280 ft/mi h/3600 s = 5.24-10 ft = 0.063 in = 1.60 mm 1.08-10-5 ft²/s-2 ft 10 mi/h 5280 ft/mi- h/3600 s = 6.06 10³ ft=0.073 in = 1.8 mm 8=5. 1/2 1/2

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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