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
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The actual car will be running at V= 35 km/h at p-1 atm and T=0°C (the air density and viscosity are
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The average drag force on the model is 50 N. What is the drag force on the prototype?
Note that dimensionless drag is Cp
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O 41.8 N
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A one-third scale model of an airplane is to be tested in water. The airplane has a velocity of 900 km/h in air at −50°C. The water temperature in the test section is 10°C. The properties of air at 1 atm and −50°C: ? = 1.582 kg/m3, ? = 1.474 × 10−5 kg/m·s. The properties of water at 1 atm and 10°C: ? = 999.7 kg/m3, ? = 1.307 × 10−3 kg/m·s. In order to achieve similarity between the model and the prototype, the water velocity on the model should be (a) 97 km/h (b) 186 km/h (c) 263 km/h (d ) 379 km/h (e) 450 km/h
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Chapter 1 Solutions
Fundamentals of Aerodynamics
Ch. 1 - For most gases at standard or near standard...Ch. 1 - Starting with Equations (1.7),(1.8), and (1.11),...Ch. 1 - Consider an infinitely thin flat plate of chord c...Ch. 1 - Consider an infinitely thin flat plate with a 1 m...Ch. 1 - Consider an airfoil at 12 angle of attack. The...Ch. 1 - Consider an NACA 2412 airfoil (the meaning of the...Ch. 1 - The drag on the hull of a ship depends in part on...Ch. 1 - The shock waves on a vehicle in supersonic flight...Ch. 1 - Consider two different flows over geometrically...Ch. 1 - Consider a Lear jet flying at a velocity of 250...
Ch. 1 - A U-tube mercury manometer is used to measure the...Ch. 1 - The German Zeppeins of World War I were dirigibles...Ch. 1 - Consider a circular cylinder in a hypersonic flow,...Ch. 1 - Derive Archimedes principle using a body of...Ch. 1 - Consider a light, single-engine, propeller-driven...Ch. 1 - Consider a flat plate at zero angle of attack in a...Ch. 1 - Consider the Space Shuttle during its atmospheric...Ch. 1 - The purpose of this problem is to give you a feel...Ch. 1 - For the design of their gliders in 1900 and 1901,...Ch. 1 - Consider the existence of a forward-facing axial...
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- An aircraft wing is flying at an altitude of 25000ft above sea level. Calculate for the temperature, pressure and density on the wing at that altitude *arrow_forwardA block of mass 4.0 kg moves horizontally on a film of crude oil at 30°C. The contact area of the undersurface is 0.06 m². If initially the block has a speed of 3.0 m/s, find the speed after 1 s. Dynamic viscosity of crude oil at 30° is 1.65 x 10-3 Pa.s. The oil film thickness below block is 0.3mm.arrow_forwardCOnsider an airplane flying at a standard altitude of 6km with a velocity of 330m/s. At a point on the wing of the airplane, the velocity is 400m/s. Calculate the pressure at this point. Cp=1008 j/kgK. answer should be in metric. and detailed solution.arrow_forward
- An air-hockey puck has a mass of 50 g and is 9 cm in diameter.When placed on the air table, a 20 °C air film, of0.12-mm thickness, forms under the puck. The puck isstruck with an initial velocity of 10 m/s. Assuming a linearvelocity distribution in the air film, how long will it takethe puck to ( a ) slow down to 1 m/s and ( b ) stop completely?Also, ( c ) how far along this extremely long table will thepuck have traveled for condition ( a )?arrow_forwardA bird moving in air or a fish moving in water experiences a force opposite to its direction of motion. Do you expect any change in the magnitude of this force? (a) If the fluid is heated and temperature is increased by to T0+10°K. (b) If the fluid is cooled down and its temperature is reduced to T0-10°K. Clearly mention your assumptions (if there is any) and justify your answer for each case.arrow_forwardThe SR-71 Blackbird, which is 107 feet 5 inches long, is the world’s fastest airplane. It can fly at three times the speed of sound (Mach 3) at altitudes of 80,000f t. When it lands after a long flight it is too hot to be touched for about 30 minutes, and is 6.0 inches longer than at takeoff. How hot is the Blackbird when it lands, assuming its coefficient of linear expansion is 2.4 × 10−5K−1 and its temperature at takeoff is 23oC?arrow_forward
- The P-35 experiences a certain dynamic pressure at its cruising speed of 114.2 m/s at an altitude of 4 km. Now assume the P-35 is flying at sea level. At what velocity must it fly at sea level to experience the same dynamic pressure?arrow_forward(b) A Formula 1 team tests their car in a wind tunnel at a scale of 50%, at a speed of Vwinarunnet = 50 m/s. The measured downforce at this speed is Foownforce.WT = 3000 N and the model reference area is Aref wT = 0.5 m?. 1. Find the downforce magnitude on the full-scale race car at the same Reynolds number. Assume constant air density p = 1.2 kg/m. II. It is said that F1 cars could travel upside down, as shown below. At what speed should the full-scale car travel to achieve this, if its mass is m = 740 kg? The acceleration of gravity is g = 9.81 m/s?. Downforce Weightarrow_forwardFind the force acting on a submarine with a speed of 1.5 km per hour. Consider the submarine as a cylinder with a diameter of 2m and a length of 10m. µwater = 0.9142 x10-3 Pa s, pwater= 997.2kg/marrow_forward
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