Engineering, 26.02.2020 05:58 erikagibson3414
A perfect gas expands in a frictionless nozzle from stagnation conditions p 0 = 4 MPa, T0 = 2500 K to ambient pressure 0.1 MPa. Given that the expansion is isentropic, determine the following conditions at the final pressure: (1) velocity, (2) Mach number, (3) temperature, and (4) area per unit mass flow. How does the final flow area compare with the throat area for a PROBLEMS 89 given mass flow? The specific heat ratio y is 1.4, and the molecular weight M is 30.
Answers: 2
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Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?
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An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid
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A perfect gas expands in a frictionless nozzle from stagnation conditions p 0 = 4 MPa, T0 = 2500 K t...
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