Over the Gurney Flap configuration, the horizontal freestream flow with a velocity of Uꝏ deflects upwards as shown in the figure above. Please answer the following questions,
a) Define/show the forces acting on the flap with their correct directions.
b) Is there a pressure difference between the fluid pressure acting on the top and bottom of the plate? If there is, which one is higher?
c) If Gurney flap shown above is tilted more and more in order to deflect the incoming freestream flow more and more in the upwards direction, do you expect a flow reversal? If you do, why and where will that more likely to happen?
d) What is the effect of these on the flow over the top rear of the car (shown below in red rectangle)? Explain
