Engineering, 28.09.2019 00:30 farashka03
An oil with k = 0.120 w/m ⋅ k, cp = 2,000 j/kg ⋅ k, rho = 895 kg/m^3, and µ = 0.0041 kg/m ⋅ s flows through a 2 cm diameter tube which is 2 m long. the oil is cooled from 60°c to 30°c. the mean flow velocity is 0.4 m/s, and the tube wall temperature is maintained at 24°c (µw = 0.021 kg/m ⋅ s). calculate the heat transfer rate.
Answers: 1
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Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10
Answers: 1
An oil with k = 0.120 w/m ⋅ k, cp = 2,000 j/kg ⋅ k, rho = 895 kg/m^3, and µ = 0.0041 kg/m ⋅ s flows...
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