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A very long cylinder (diameter 1mm) is placed perpendicular to a steady airstream whose velocity is 10 m/sec. The cylinder is heated electrically at 100 watts/meter span. At what distance downstream is the rms temperature fluctuation in the wake of the cylinder reduced to 1?C? Assume that the distribution of the mean temperature difference in the wake is similar to the distribution of the mean velocity defect. For air at room temperature and pressure, ? = 1.25kg/m3, cp = 103joule/kg?C. Hint: the dimension of the heating is joules/sec/meter. The dimension of the heat flux through position x is (?cp)T times the velocity times the integrated profile in y, which will have a dimension of length. The dimensions of the heating and the dimensions of this heat flux are the same.
a 5 kg object a and a 10 kg object b undergo an oblique central impact. the coefficient of restitution is e 0.6.
If the final pressure is 1.0 MPa, determine (a) the temperature (°C) at the final state and (b) the heat transfer (kJ) during this process.
1. A Brayton cycle uses air and produces a net work of 14000 Btu/s with an inlet state of 60°F, 14.7 psi and a compression ratio of 16. The heat added in the combustion process is 400 Btu/lbm. If the thermal efficiency is 0.547 Determine: Using va..
determine the velocity of a detonation wave propagating through an ideal-gas mixture having a constant specific heat cp
an insulated rigid tank contains 2.5 kg of water at 150 degrees c initially. at this state 1.4 kg of the water is in
for problem 372 in meriam and kraiges 6th edition dynamics why is the max normal force at the side? how can we prove
If the unit can perform its function either in State 1 or 2, find the steady-state availability A for the device.
a large storage tank contains 500000 l of milk. milk enters the tank through a 0.05 m diameter pipe at a velocity of 3
a spring loaded device imparts an initial vertical velocity of 50 ms to a 0.15 kg ball. the drag force on the ball is
Is it possible to rotate turbine blades without any fluid means there is no requirement of water or air to rotate turbine blade.
vinefera grapes are picked when the outside temperature is 35c and then cooled to 5c within a 12-h period. for each
the piston diameter is dp 3 mm and the piston position is initially s1 5 cm from the bottom of the piston. at this
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