At steady state, air at 200 kPa, 330 K, and mass flow rate of 0.1 kg/s enters an insulated duct having differing inlet and exit
cross-sectional areas. The inlet cross-sectional area is 6 cm2. At the duct exit, the pressure of the air is 100 kPa and the velocity is 250 m/s. Neglecting potential energy effects and modeling air as an ideal gas with constant cp = 1.008 kJ/kg · K, determine: (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in K. (c) the exit cross-sectional area, in cm2.
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Answer:
h= 37.9 m
Explanation:
Given that
SG = 0.8 for fuel so density of fluid will be 800 kg/m³.
We know that SG = 13.6 For Hg so density will be 13600 kg/m³.
Now by balancing the pressure
h= 37.9 m
Answer:
Explanation:
Let assume that changes in gravitational potential energy can be neglected. The fire hose nozzle is modelled by the Bernoulli's Principle:
The initial pressure is:
The speed at outlet is:
The initial pressure is: