Question

The drag force acting on the cylinder was measured using a multi-tube well type manometer. The small holes are drilled in the surface of the cylinder which are attached to small tubes. The tubes are connected to the manometer tubes to measure the pressure distribution on the cylinder immersed in a flow. The pressure is assumed to remain constant over each segment and the force is given by F = sum_{k=1}^{36} P_k(cos heta_k hat{imath} + sin heta_k hat{jmath})R frac{10^circ cdot 2pi}{360^circ} (a) Pressure distribution is acquired as below. Locate the position of the leading edge on the graph below. [2 pts] (b) Assume that you measure the drag force on the circular cylinder using a dynamometer (as you did in Lift and Drag Measurements of an airfoil Lab). The cylinder is mounted on a sting to transmit the force into the dynamometer. In this experiment, do you expect the drag force with the dynamometer to be higher or lower than the drag force you originally measured with the manometers? Explain. Disregard the effect of sting on the drag measurement. [8 pts]

          The drag force acting on the cylinder was measured using a multi-tube well type manometer. The small holes are drilled in the surface of the cylinder which are attached to small tubes. The tubes are connected to the manometer tubes to measure the pressure distribution on the cylinder immersed in a flow. The pressure is assumed to remain constant over each segment and the force is given by
F = sum_{k=1}^{36} P_k(cos 	heta_k hat{imath} + sin 	heta_k hat{jmath})R frac{10^circ cdot 2pi}{360^circ}
(a) Pressure distribution is acquired as below. Locate the position of the leading edge on the graph below. [2 pts]
(b) Assume that you measure the drag force on the circular cylinder using a dynamometer (as you did in Lift and Drag Measurements of an airfoil Lab). The cylinder is mounted on a sting to transmit the force into the dynamometer. In this experiment, do you expect the drag force with the dynamometer to be higher or lower than the drag force you originally measured with the manometers? Explain. Disregard the effect of sting on the drag measurement. [8 pts]

$The drag force acting on the cylinder was measured using a multi-tube well type manometer. The small holes are drilled in the surface of the cylinder which are attached to small tubes. The tubes are connected to the manometer tubes to measure the pressure distribution on the cylinder immersed in a flow. The pressure is assumed to remain constant over each segment and the force is given by F = sumk=1^36 Pk(cos hetak hatimath + sin hetak hatjmath)R frac10^circ cdot 2pi360^circ (a) Pressure distribution is acquired as below. Locate the position of the leading edge on the graph below. [2 pts] (b) Assume that you measure the drag force on the circular cylinder using a dynamometer (as you did in Lift and Drag Measurements of an airfoil Lab). The cylinder is mounted on a sting to transmit the force into the dynamometer. In this experiment, do you expect the drag force with the dynamometer to be higher or lower than the drag force you originally measured with the manometers? Explain. Disregard the effect of sting on the drag measurement. [8 pts]$

Added by Tammie L.

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