# Essay on Drag on a Cylinder

3178 Words Mar 22nd, 2012 13 Pages
Drag on a cylinder
ENME432L section 0101 Date of the Experiment: Feb. 21, 2012
Date submitted: Feb. 28, 2012
Instructor: Anilchandra Attaluri
Prepared by:
Ku Choe: ________ Dwight Hofstetter: _________
Benjamin DiDonato: _______
Lab report checklist: x Have you included the raw (handwritten) data sheet? x Have you included your pre-lab report which has been signed by your TA or instructor? x Have you typed the measured data and include them into your report? x Have you included enough data so that the instructor can calculate the final results himself? x Have you included detailed methods so that your younger brother or sister can understand what you did? x Have you
Also, mcol is the mass of the weight balancing collar, mcrad is the mass of the cradle, mw is the mass of the weight added to the cradle, FD is the drag force, mc is the mass of the cylinder, and g is the acceleration due to gravity. The balanced summation of moments can be seen in Equation 1.
ΣMo= - ((mcradg +mwg)lcrad – (mcolg)lcol + (FD+ mcg)lc = 0 (1) ΣMo is the summation of moments about point O lcrad is the distance from the cradle to the pivot point lcol is the distance from the weight balancing collar to the pivot point lc is the distance from the cylinder to the pivot point g is the acceleration due to gravity mcol is the mass of the weight balancing collar mcrad is the mass of the cradle mw is the mass of the weight added to the cradle FD is the drag force mc is the mass of the cylinder
A cross sectional view of the control volume is provided in Figure 2. Figure 2 – Cross Sectional View of Control Volume
Figure 2 – Cross Sectional View of Control Volume

Following the image, V1 is the velocity of the air entering the control volume, V2 is the velocity of the air before the pitot tube, V3 is the velocity of the air leaving the control volume,

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