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Air enters the diffuser of a turbojet engine with a mass flow rate of 85 lb/s at 9 lbf/in^2, 420 R, and a velocity of 750 ft/s. The pressure ratio for the compressor is 12, and its isentropic efficiency is 88%. Air enters the turbine at 2400 R with the same pressure as at the exit of the compressor. Air exits the nozzle at 9 lbf/in^2. The diffuser operates isentropically and the nozzle and the turbine have isentropic efficiencies of 92% and 90% respectively. Neglect kinetic energy except at the diffuser inlet and the nozzle exit. On the basis of air-standard analysis, calculate:
1) the rate of heat addition, in Btu/h.
2) the pressure at the turbine exit, in psi.
3) the compressor power input, in Btu/h.
4) the velocity at the nozzle exit, in ft/s.
An adiabatic gas turbine expands air at 1300 kPa and 500 °C to 100 kPa and 127 °C. Air enters the turbine through a 0.2 m2 opening with an average velocity of 40 m/s, and exhausts through a 1 m2 opening. Determine the specific volumes of both inlet a..
Propane vapor enters a valve at 1.0 MPa, 60°C, and leaves at 0.3 MPa. If the propane undergoes a throttling process, what is the temperature of the propane leaving the valve, in °C?
A very rough plate is placed in water. The plate is held constant at a temperature of Ts = 350K, and water flows over the plate at Tinfinity = 300 K. It is desired that the heat lost from the upper surface of the plate be q'' = 1.2 MW/m2. If the plat..
2-kg of saturated liquid r-134a with an initial temperature of -10 c is contained in a well-insulated weighted post
Determine the radial acceleration of a point on the outer surface of the 36 inch diameter tires of a jet powered car traveling at 660mph.
hemispherical end caps are welded to a cylindrical main body to form a propane storage tank. the tank has an inside
1. graphically verify moseleys law for the k beta1 lines of cu mo and w.2. acalculate the mass an linear absorption
Given water h=3227 KJ/Kg Temperature 400C Find specific volume, pressure, and specific internal energy. Given R-134a T=15F quality x =0.6 Find pressure, specific volume, specific enthalpy. Given Water P=4Mpa U=3000 KJ/Kg Find Temperature, and specifi..
What is the thermal and mechanical efficiency for this engine when used as heat pump and refrigerator with the following propties;
Air at 40 °C, 1 bar, and 10% RH goes through an evaporative cooler, and the outlet air is cooled to 27 °C. Find (a) the relative humidity at the outlet, and (b) the amount of water added (kg H20 per kg of air).
the 10-kg mass a is moving at 5 ms when it is 1 m from the stsaionary 10 kg mass b. the coefficiient of kinetic
Saturated R-134a in a chamber undergoes a constant temperature process starting at 52 F and a quality of x-0.15, and ending at a pressure of 44 Ibf/in^2. What is the change in specific volume?
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