MEEN 344: Section 502 HW Problem Set #4 (Due on 10/03/06) 1. A two-dimensional reducing bend has a linear velocity profile at section 1. The flow is uniform at sections 2 and 3. The fluid is incompressible and the flow is steady. Find the magnitude and direction of the uniform velocity at section 3. 2. Consider incompressible steady flow of standard air in a boundary layer on the length of porous surface shown. Assume the boundary layer at the downstream end of the surface has an approximately parabolic velocity profile, 2)/()/(2/δδyyUu −=∞. Uniform suction is applied along the porous surface, as shown. Calculate the volume flow rate across surface cd, through the porous suction surface, and across surface bc. 3. Water is flowing steadily through the 180o elbow shown. At the inlet to the elbow the gage pressure is 96 kPa. The water discharges to atmospheric pressure. Assume properties are uniform over the inlet and outlet areas: A1 = 2500 mm2, A2 = 550 mm2, and V1 = 4 m/s. Find the horizontal component of force required to hold the elbow in place https://www.coursehero.com/file/5923177/Meen-344-HW-4/This study resource wasshared via CourseHero.com4. A rocket sled accelerates from rest on a level track with negligible air and rolling resistances. The initial mass of the sled is Mo = 500 kg. The rocket initially contains 150 kg of fuel. The rocket motor burns fuel at constant rate m = 15 kg/s. Exhaust gases leave the rocket nozzle uniformly and axially at Ve = 2500 m/s relative to the nozzle, and the pressure is atmospheric. Find the maximum speed reached by the rocket sled. Calculate the maximum acceleration of the sled during the run. https://www.coursehero.com/file/5923177/Meen-344-HW-4/This study resource wasshared via CourseHero.comPowered by TCPDF
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