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Question - The cross-section of a turbine rotor disc is designed for uniform strength under rotational conditions. The disc is keyed to a 60 mm diameter shaft at which point its thickness is a maximum. It then tapers to a minimum thickness of 10 mm at the outer radius of 250 mm where the blades are attached. If the design stress of the shaft is 250 MN/m2 at the design speed of 12 000 rev/min, what is the required maximum thickness? For steel p = 7470 kg/m3.
Choose an appropriate main fuel and givethe flow rates of both fuels. What is the overall air-fuel ratio? State all assumptions you make.
Derive the Prandtl-Batchelor theorem for axisymmetric flow with negligible viscous forces where the ratio ω?/σ is constant along a streamline.
1. Is it possible for two screw dislocations of opposite sign to annihilate each other? Explain your answer. 2. For each of edge, screw, and mixed dislocations, cite the relationship between the direction of the applied shear stress and the directi..
one part of the tank contain 2.5 kg of compressed liquid water at 60 C and 600 kPa while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. Determine the final temperature of the water and the..
the steam turbine power plant uses water as the working fluid and will be modeled as a simple ideal rankine cycle. the
a reversible heat engine operating a 1500 f source and the atmosphere at 0 f produces work to drive a reversible heat
In an ideal constant pressure cycle, ( is the one in which both, QA as well as QRare at constant pressure ) using air, the overall volume ratio of the cycle is 8:1. Adiabatic compression begins at 2/7th of the compression stroke when the conditions o..
bullet b weighs 0.5oz and blocks a and c both weigh 3 lb. the coefficient of friction between the blocks and the plane
a two stage crushing operation feeds 0.6m diamater ore into a primary crusher at a rate of 25 mthr. 75 of the ore feeds
A heat pump with a coefficient of performance of 3.5 provides energy at an average rate of 70,000 kJ/h to maintain a building at 208C on a day when the outside temperature is 258C. If electricity costs 8.5 cents per kW ? h, (a) determine the actua..
The compound system in the sketch below contains a gas (Cv0 = 2.5 mR) on both sides of an internal wall. As heat is transferred across the wall, the piston moves to the right until the gases obtain thermal equilibrium at T2. During this process the s..
A 0.3-L glass of water at 20°C is to be cooled with ice to 5°C. The melting temperature and the heat of fusion of ice at atmospheric pressure are 0°C and 333.7 kJ/kg, respectively, and the density of water is 1 kg/L.
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