A rotating cylinder with the diameter of 1 meter is placed in a huge wind tunnel capable of producing the maximum air ve

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A Rotating Cylinder With The Diameter Of 1 Meter Is Placed In A Huge Wind Tunnel Capable Of Producing The Maximum Air Ve 1 (52.57 KiB) Viewed 18 times

A rotating cylinder with the diameter of 1 meter is placed in a huge wind tunnel capable of producing the maximum air velocity of 25 m/s. At such air velocity, your task is to find the maximum rotating speed of the cylinder before the stagnation point detach from the cylinder surface. Sketch the flow field at that instance, and if the gage pressure is zero at location far from the cylinder, calculate the minimum pressure acting on the cylinder. Show the minimum pressure point in your sketch. [10 marks] Formula др др + и at дх др др + w дz (ди до дw р + дхду дz = 0 ди at ди ди +u — +1 дх ду + ди w. дz 1 др ја? д?и а?u +9х+у + рах + ду? дz? [дх2 др и = ду 11 дф дх 1 до дф V = де где др и — дх дф ду Ve = дф _1 дф ar где ф= Uору ф г. Inr 2п а 2п u sine r ф= 0 в рvi + вед, в р. + 2 + вра, + pv? pv} pgh