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The variable-wall concept is proposed to maintain constant boundary-layer thickness in the wind tunnel of Problem 9.62. Beginning with the initial conditions of Problem 9.62, evaluate the freestream velocity distribution needed to maintain constantboundary-layer thickness. Assume constant width, W^. Estimate the top-height settings along the test section from x = 0 at section CD to x = 254 mm at section downstream.
A fixed mass of nitrogen gas is stored in a cylindrical tank with an internal diameter of .45m and a length of 1.6m. The pressure and temperature of the nitrogen are 2MPa and 75 degrees Celsius. Determine the mass of the nitrogen stored in the tank.
the wheel of a crane lift is rolling on a flat rail. the radius of the wheel is 4 in the contact length and force are
one car p heading north begins at rest and accelerates with acceleration a. the other car q begins with a velocity of
the pressure drop needed to force water through a 1-in.-diameter pipe the pipe is on a 20 degree hill is 0.76 psi for
Air enters the evaporator section of an air-conditioner at 100 kPa, 27oC with a volumetric flow rate of 6 m3/min. R-134a enters the evaporator at 120 kPa with a quality of 0.3 and rate of 2 kg/min and it leaves as a saturated vapor at the same pressu..
an air-standard brayton cycle has compressor inlet conditions of 310 k and 98 kpa and turbine inlet conditions of 882
a distillation column is separating phenol from p-cresol at 1 atm pressure. the distilshylate composition desired is
consider an ideal rankine cyle steam power plant with reheat. superheated vapor enters the first turbine stage at 10
An air cushion vehicle is supported by forcing air into the chamber created by a skirt around the periphery of the vehicle as shown in Fig. P3.106. The air escapes through the 1.7-in. clearance between the lower end of the skirt and the ground (or wa..
a gas within a piston-cylinder assembly undergoes a thermodynamic cylce consisting of three processes. process 1-2
a refrigerator removes 1.5 kj from the cold space using 1 kj work input. how much energy goes into the kitchen and what
two l4 x 4 x 12-in. angles parallel to and on the x-axis are welded to either sides of a 10-in. high by 12-in. wide
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