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For the adiabatic expansion of a perfect gas through a turbine, show that the overall efficiency ηt and small stage efficiency ηp are related by
where , and r is the expansion pressure ratio, γ is the ratio of specific heats. An axial flow turbine has a small stage efficiency of 86%, an overall pressure ratio of 4.5 to 1 and a mean value of γ equal to 1.333. Calculate the overall turbine efficiency.
consider an ideal combined cycle with compression ratio of 71 in which air enters the compressor at 295 k enters the
Consider a discrete-time LTI system with impulse response h[n] given by h [n] = anu [n]
does the atmospheric pressure inside of a tube aproximately a half an inch in diameter cause resistance against an end
A 4 cm diameter pipe passes water at a rate of 1 m3/s. If we neglect viscous shear, what pressure drop per unit length must be imposed across this pipe to accelerate the volumetric flow rate by 1 m3/s2?
Calculate the unit cell edge length for an 80 wt% Ag-20 wt% Pd alloy. All of the palladium is in solid solution, the crystal structure for this alloy is FCC, and the room temperature density of Pd is 12.02 g/cm3.
for an oil field in the south of texas usa where a vertical well is drilled to a maximum depth of 10000 ft the average
a single-pane glass window is used in a heated dwelling. outside the dwelling the ambient temperature is 0degc while
A pipe transporting water undergoes a sudden expansion. If the upstream pressure is 200 kPa and the mass ?ux is 40 kg=s, ?nd the pressure downstream, where a uniform ?ow can be assumed, and the head lost due to the expansion. Use the following dim..
calculate the exergies of two closed systems respectively 1 kg of steam at 800 kpa and 180 degc and 1 kg of r-134a at
Five kilogram of saturated water vapor at 300 kPa is heated at constant pressure until its temperature reaches 200oC. Calculate the work done by the steam during this process.
Crank AB of the linkage shown rotates clockwise at 300 rpm. Using graphical method, determine the velocity of point B, C, D, and E.
Calculate the Film thickness at a distance of 25 cm from the top of the plate and local heat transfer coefficient at a distance of 25 cm from the top of the plate.
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