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Max. Marks: 100

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Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fourth semester B.Tech examinations (S), September 2020

Course Code: AO202
Course Name: AERODYNAMICS I

PARTA
Answer any three full questions, each carries 10 marks.
Define vorticity and its value in rotational and irrotational flow?

Consider a velocity of flow in an incompressible flow field is given by
u = y/(x? +y?) and v = -x/(x?+y?). Calculate the vorticity and identify what type
of flow?
A fluid flow is given by its velocity V= 16x°i - 20x’y. Find shear strain rate and
state prove that the flow exist and is a rotational flow
Is the stream lines and equipotential lines are orthogonal? Prove your statement.
Derive the expression for velocity potential (9) and stream function (ம) for
source and sink. And hence prove stream lines are straight lines and
equipotential lines are circles.
Consider a velocity field is where the x and y component of velocity are given
by u = cy/(x? +y?) and v = -cx/(x?+y?).Obtain the equation for stream line.
Derive the equation of stagnation streamline for the combination of source-sink
pair in a uniform flow and with neat sketch.
PART 0

Answer any three full questions, each carries 10 marks.
Magnus effect creates the aerodynamic forces over body. Justify the statement.
Define Kutta condition with the help of a diagram? Apply the Kutta condition
for an airfoil with cusped and finite angle trailing edge?
“The pressure distribution over the top of the right circular cylinder is exactly
balanced by the pressure distribution over the bottom of the cylinder’. Which
elementary flow combination contribute this effect. Derive the value of stream
function and coeffient of pressure. Plot the graph between त] and 6. Also
calculate the points at which the static pressure is equal to free stream static

pressure.

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Duration: 3 Hours

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