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The air entering the impeller of a centrifugal compressor has an absolute axial velocity of 100 m/s. At rotor exit the relative air angle measured from the radial direction is 26°36' the radial component of velocity is 120 m/s, and the tip speed of the radial vanes is 500 m/s.
Determine the power required to drive the compressor when the air flow rate is 2.5 kg/s and the mechanical efficiency is 95%. If the radius ratio of the impeller eye is 0.3, calculate a suitable inlet diameter assuming the inlet flow is incompressible. Determine the overall total pressure ratio of the compressor when the total-to-total efficiency is 80%, assuming the velocity at exit from the diffuser is negligible.
steam at 7 bars and temperature t enters an adiabatic mixing tank. compressed water at 40 c and 7 bars enters at
50 degree c water is flowing in a 10mm diameter smooth tube. the mass flow rate of the water is 0.08 kgs. the water
the system is released from rest in the position shown. the masses of the collar a and the box b are ma 90 kg and mb
A pressure gauge reads in Tuscaloosa alababama 16 psi. Can this pressure be a vacuumed pressure? Why or why not? If you think it can convert it to absolute pressure. If you think it cant assume that it is a gauge pressure and convert to absolute pres..
a refrigerator should remove 500 kj from some food. assume the refrigerator works in a carnot cycle between -10 degrees
A vertically mounted piston-cylinder device contains 1.5 kg of water and is being heated over a coal burning stove. During the process, 75 kJ of heat is transferred to the water and heat losses from the side walls amount to 9 kJ.
Fish swimming above a dam may be up to 260 feet beneath the surface of the lake. What ambient pressure change would a fish experience if it was pulled up to a boat? Calculate in kPa and in atm.
An exothermic process occurs uniformly throughout a 10-cm-diameter sphere (k = 300 W/m.K, cp = 400 J/kg.K, ? = 7500 kg/m3), and it generates heat at a constant rate of 1.2 MW/m3. The sphere initially is at a uniform temperature of 20oC, and the exoth..
An ideal Rankine cycle uses water as its working fluid. The mass flow rate of water through the cycle is 150 kg/s. saturated vapour enters the turbine at 15 MPa and saturated liquid enters the pump at 10 kPa. Cooling water passes through the condense..
A hydraulic cylinder has a piston diameter of 2.2 inches, a fluid pressure of 1100 psi, a flow rate of 132 cubic inches per minute, and a stroke of 10.5 inches. Find the force and the velocity generated by the piston.
an overhead door is guided by wheels at a and b that roll in horizontal and vertical tracks. knowing that when theta
Given values of the diffusion coefficient for carbon in iron at 850°C and 950°C, we can calculate the activation energy for the diffusion of carbon in iron. the activation energy for vacancy migration in copper, we can calculate the activation energy..
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