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Exam_1_2005_key

# Exam_1_2005_key - EAS 4101 Aerodynamics Spring 2005 Exam#1...

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EAS 4101 - Aerodynamics – Spring 2005 2/21/05, Exam #1 Name: _____________key___________ 1/10 Questions: (30 points total, 3 points each, unless otherwise marked) 1. What is the definition of the center of pressure for an airfoil? The point on an airfoil about which the aerodynamic moment due to the distributed pressure load is zero. 2. What is the definition of the aerodynamic center for an airfoil? The point on an airfoil about which the aerodynamic moment due to the distributed pressure load is not a function of the angle of attack. 3. State the 3 methods (and their respective assumptions) discussed in class of deriving Bernoulli’s equation Inviscid, incompressible and along a stream line via Euler-S equation Inviscid, incompressible and irrotational via Cartesian Euler equation Conservative flow via energy equation 4. For inviscid flow around a bend, does the pressure increase, decrease, or remain the same in the outward direction from the bend (or radius of curvature is increasing)? Pressure will increase via Euler-N equation

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