Exam_1_2009 - EAS 4101 Aerodynamics Spring 2009 02/25/09...

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EAS 4101 – Aerodynamics – Spring 2009 02/25/09 Exam #1 Name: ___________________________ 1 I. TRUE/FALSE (10 Points total – 1 point each) 1. Streamlines, pathlines, streaklines, and timelines are identical for steady flows. 2. A streamline is a curve that is everywhere tangent to the instantaneous local velocity vector. 3. In a Newtonian fluid, the relationship between an applied shear stress and the resulting deformation rate on the fluid is governed by a linear viscosity law. 4. A natural extension of particle mechanics, the Eulerian method of fluid flow analysis focuses on material particles as they move through the flow. 5. The deviatoric stress tensor consists of stresses associated with fluid motion. 6. If an aircraft is moving with constant velocity, the lift force has the same magnitude as the drag force. 7. Flow in a boundary layer is irrotational in the presence of a favorable pressure gradient. 8. The leading edge of an airfoil is the forward most point on the mean camber line. 9. The Kutta-Joukowski Theorem states that the lift per unit span is inversely proportional to circulation. 10. The center of pressure is defined as 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. II. FILL IN THE BLANK (20 Points total) 11. The ____________ axis runs from wingtip to wingtip through the airplane’s _____________________. Motion about this axis is called _____________ and is produced by deflection of the _______________. ( 4 points ) 12. The two primary types of drag experienced by an aircraft in flight are _______________, a by-product of lift, and ________________, which is the air resistance produced by the airframe components. ( 2 points ) 13.
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Exam_1_2009 - EAS 4101 Aerodynamics Spring 2009 02/25/09...

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