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cxcxcx0505
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Join Date: Mar 2012
Posts: 34

Drag Coefficient for Plate Perpendicular to Airflow

03/26/2012 11:20 PM

http://en.wikipedia.org/wiki/Drag_coefficient

from wikipedia, it is written 1.98-2.05 for flat plate perpendicular to flow(2D) , but I have a differrent b/h ratio plate, where h=157mm and b=816mm , b/h=5.197

how to get the drag coefficient in this case?

Thanks.
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adiptadatta
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Join Date: Mar 2012
Posts: 13
#1

Re: drag coefficient for plate perpendicular to airflow

03/27/2012 12:59 AM

Hi, cxcxcx0505,

The formula for drag coeffecient (Cd) is D/(0.5 * rhoe * V^2 * A) where D is the drag force, A is the frontal area rhoe is the density and V is the velocity. From the data, you have given, you can calculate the frontal area. But you need to know the values of D, rhoe and V to calculate Cd.
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cxcxcx0505
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Join Date: Mar 2012
Posts: 34
#2
In reply to #1

Re: drag coefficient for plate perpendicular to airflow

03/27/2012 3:31 AM

Actually I need to drag coefficient to calculate the drag force
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adiptadatta
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Join Date: Mar 2012
Posts: 13
#3
In reply to #2

Re: drag coefficient for plate perpendicular to airflow

03/27/2012 3:33 AM

Then the other parameters must be given..or else you have to find out them in order to calculate the Cd and hence calculate D.
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cxcxcx0505
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Posts: 34
#4
In reply to #3

Re: drag coefficient for plate perpendicular to airflow

03/27/2012 4:32 AM

V=25 m/s

A=0.128112 m²

ρ=1.21534

then?
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adiptadatta
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Join Date: Mar 2012
Posts: 13
#5
In reply to #4

Re: drag coefficient for plate perpendicular to airflow

03/27/2012 5:04 AM

Here you need to take Cd as 1.98.
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nick name
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Join Date: Mar 2007
Location: City of Light
Posts: 3943
Good Answers: 183
#6

Re: Drag Coefficient for Plate Perpendicular to Airflow

03/27/2012 1:45 PM

here is the answer to your question.
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Previous in Forum: HSS-R Vs HSS-G Drill   Next in Forum: Seraation for Tongue and Groove, Male and Female Flange of EN and DIN Standard

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