Consider inviscid, incompressible flow over a closed semi-cylinder with radius 0.5m. Assume the flow field over the top of the semi-cylinder is identical to the flow over a cylinder for Osesn. Assume the pressure on the bottom of the semi-cylinder is stagnation pressure, po. The freestream velocity is 3 m/s and the density is 1.23 kg/m?. a) What is the net lift force acting on the semi-cylinder? U b) What is the net drag force acting on the semi-cylinder? P. Now consider that the flow is viscous, but still incompressible and that the dynamic viscosity is 2x10 kg/(m*s). c) Estimate the drag on the semi-cylinder assuming it is equivalent to % the drag of a cylinder. Recall that Co=f(Re) for a cylinder as shown below. d) Do you estimate the boundary layer to be laminar or turbulent in part (c) and why? tttt

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Problem 1.1MA
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400
200
100
60
40
20
10
Cp 6
4
Theory due
to Stokes
0.6
0.4
0.2
0.1
10 2 4 6810 z 4 6810'2 4 6810e2 4 68102 4 6810*2 4 68102 4 6810
Re =
VD
mared ý
Transcribed Image Text:400 200 100 60 40 20 10 Cp 6 4 Theory due to Stokes 0.6 0.4 0.2 0.1 10 2 4 6810 z 4 6810'2 4 6810e2 4 68102 4 6810*2 4 68102 4 6810 Re = VD mared ý
y Consider inviscid, incompressible flow over a closed semi-cylinder with radius
0.5m. Assume the flow field over the top of the semi-cylinder is identical to the flow over a
cylinder for Osesrn. Assume the pressure on the bottom of the semi-cylinder is stagnation
pressure, po. The freestream velocity is 3 m/s and the
density is 1.23 kg/m'.
a) What is the net lift force acting on the semi-cylinder?
b) What is the net drag force acting on the semi-cylinder?
P.
Now consider that the flow is viscous, but still
incompressible and that the dynamic viscosity is 2x10 kg/(m*s).
c) Estimate the drag on the semi-cylinder assuming it is equivalent to % the drag of a
cylinder. Recall that Co=f(Re) for a cylinder as shown below.
d) Do you estimate the boundary layer to be laminar or turbulent in part (c) and why?
Transcribed Image Text:y Consider inviscid, incompressible flow over a closed semi-cylinder with radius 0.5m. Assume the flow field over the top of the semi-cylinder is identical to the flow over a cylinder for Osesrn. Assume the pressure on the bottom of the semi-cylinder is stagnation pressure, po. The freestream velocity is 3 m/s and the density is 1.23 kg/m'. a) What is the net lift force acting on the semi-cylinder? b) What is the net drag force acting on the semi-cylinder? P. Now consider that the flow is viscous, but still incompressible and that the dynamic viscosity is 2x10 kg/(m*s). c) Estimate the drag on the semi-cylinder assuming it is equivalent to % the drag of a cylinder. Recall that Co=f(Re) for a cylinder as shown below. d) Do you estimate the boundary layer to be laminar or turbulent in part (c) and why?
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