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Design a 1-m-long cylindrical wind tunnel whose diameter is 25 cm operating at a Mach number of 1.8. Atmospheric air enters the wind tunnel through a converging- diverging nozzle where it is accelerated to supersonic velocities. Air leaves the tunnel through a converging-diverging diffuser where it is decelerated to a very low velocity before entering the fan section. Disregard any irreversibilities. Specify the temperatures and pressures at several locations as well as the mass flow rate of air at steady-flow conditions. Why is it often necessary to dehumidify the air before it enters the wind tunnel?
Sketch the thermal circuit of the system. Label (using the above symbols) all pertinent nodes and resistances.
if the discharge from the turbine is 250 cubic feet per second what power output may be expected from the turbine?
If V is a velocity, l a length and v a fluid property having dimensions of L2T-1, which of the following combinations are dimensionless:
If the wrench is to grip the pipe and be self-locking, determine the required minimum coefficients of friction at A and C.
The cold cranking amperes (CCA) of a conventional lead-acid automobile battery is the amount of current the battery can provide at 0°F for 30 seconds and maintain at least 1.2 volts per cell (or 7.2 volts for a standard 12-volt battery).
A homeowner paid $4000 for a solar water heater and received a tax credit of 30%. The system saves $450 per year. Find a simple payback time. Assuming a discount rate of 5%, find the payback time based on the PW analysis.
assume air flows isentropically through a converging-diverging nozzle. at station 1 which is aft of the throat and has
A 514.0 g/hr stream of liquid methyl alcohol, also called methanol, (CH3OH) at 6.80 atm and 36.0°C was held at constant pressure, vaporized and brought to 240.0°C. At what rate must heat be supplied to this system? Assume that methyl alcohol vapor be..
determine diameter of a circular rod of ductile material with a fatigue strength ,e=280 Mpa. Add a tensile yield strength of 350 Mpa. The member is subjected to a varying axial load from 700 kN to -300kN. Assume Kt=1.8 and factor of safety=2.
reheat where high pressure and low pressure turbines are used is added to a simple steam cycle to increase the steam
how much work must be done by a carnot refrigerator to transfer 1.0 j as heat a from a reservoir at 1.1degc to one at
a molybendenum metal pin is 25 mm long and 2mm in diameter. the air surrounding the pin is 200 degrees c the walls of
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