How much Megawatts can a motor generate if a 14 kN-m torque transmitted at 5.3 Hz is applied to the 10 mm diameter shaft attached to the motor?
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How much Megawatts can a motor generate if a 14 kN-m torque transmitted at 5.3 Hz is applied to the 10 mm diameter shaft attached to the motor?
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- A frustum-shaped body is rotating at a constant angularspeed of 200 rad/s in a container filled with SAE 10W oil at 20°C (u = 0.1 Pa.s), as shown. If the thickeness of the oil film on all sides is 1.2 mm, determine the power required to maintain this motion. Also determine the reduction power input when the oil temperature rises to 80°C (u = 0.0078 Pa.s) Case SAE 10W oil D= 12 cm L= 12 cm d =4 cmFind the power loss (in kW) when a fluid of dynamic viscosity = 1.2 Pa.s and p = 1150 kg/m³ flows at a velocity of 8 m/s in a pipe of diameter 15 cm and a length of 25 m %3D %3DThe propellers of a ship are connected to an A-36 steel shaft that is 60 m long and has an outer diameter of 340 mm and inner diameter of 260 mm. If the power output is 6 MW when the shaft rotates at 22 rad/sec. Determine the angle of twist in the shaft in radian. G = 75 GPa.
- A 100 lb cabinet is placed on a smooth surface. If a force of a 100 lb is applied for 2 s, determine the net impulse on the cabinet during this time intervalAn oil pump is drawing 18 kW of electric power while pumping oil with density 860 kg/m³ at a rate of 0.1 m³/s. The inlet and outlet diameters of the pipe are 8 cm and 11 cm, respectively. If the pressure rise of oil in the pump is measured to be 250 kPa and the motor efficiency is 95 percent, determine the mechanical efficiency of the pump. Take the kinetic energy correction factor as 1.05. Pump 8 cm D.cm ΔΡ = 250 kPa 18 kW Motor Oil 0.1 m³/s The mechanical efficiency of the pump is %.Given a system of pulley below, Block A has a mass of 50 kg. At point P it is recorded to have a velocity equal to 12 m/s with an increasing acceleration of 6 . Determine the power input to Motor at M at this instant if its efficiency is given to be 0.80 12 m/s , 6 m/s² M A
- QUESTION 1. The diameter of a pulley that is connected to the mid-span of a hollow shaft is 175mm. The pulley on the shaft is driven by a reciprocating compressor through a belt drive system, the ratio of the diameters of the connected pulleys on either sides is given as 1:2. The power transmitted by the hollow shaft is given as 45 kW while rotating at a speed of 350 rpm. The shaft has a span of 750mm which is supported on its ends by sturdy bearings that will not allow for self alignment and thereby generating bending moment at the supporting components. The tension ratio between the tight and slack sides of the belt is given as 1.9:1 with an angle of wrap of 180 degrees. Design the shaft considering that the available shaft material is BS970:070M55 that will fail in shear as per von Mises criteria, a factor of safety of 3.5 can be assumed for the material on its ultimate strength.A drum when rotating at 439 rev/min has a kinetic energy of 0.56 MJ. Find the moment of inertia.An oil pump is drawing 18 kW of electric power while pumping oil with density 860 kg/m3 at a rate of 0.1 m3/s. The inlet and outlet diameters of the pipe are 8 cm and 20 cm, respectively. If the pressure rise of oil in the pump is measured to be 250 kPa and the motor efficiency is 95 percent, determine the mechanical efficiency of the pump. Take the kinetic energy correction factor as 1.05. 18 kW Docm Pump Motor 8 сm Oil AP = 250 kPa 0.1 m/s The mechanical efficiency of the pump is |%.
- PROBLEM 6.12 The cross-sectional areas of solid shaft of diameter 400 mm and hollow shaft of internal diameter 300 mm of same material are equal. Find the ratio of power transmitted by the two shafts at the same speed.9.44 A logging boat is towing a log that is 2 m in diameter and 8 m long at 4 m/s through water. Estimate the power required if the axis of the log is parallel to the tow direction.Q6 A turbine develops 500 kW power under a head of 100 metres at 200 rpm .What would be its normal speed and output under a head of 81 m ?