Water (density p-1000 is discharging from through a hole at the bottom of a graduated 71 cylinder. The mass flow rate exiting th
e container may be approximated by: Where Cd is the dimensionless discharge coefficient, A, is the area of the discharge hole, g is the acceleration due to gravity, and y is the water height in the container. The diameter of the graduated cylinder is 8 cm.
For the following givens, use matlab or a spreadsheet to estimate the time to empty half the water from the container.
For partial credit, perform a simple calculation to estimate an amount of time known to be too short but greater than zero.
C,-0.6 2 ,-0.04 cm g 9.8 m/s/s
Yinitial20cm
For the following givens, use matlab or a spreadsheet to estimate the time to empty half the water from the container.
For partial credit, perform a simple calculation to estimate an amount of time known to be too short but greater than zero.
C,-0.6 2 ,-0.04 cm g 9.8 m/s/s
Yinitial20cm
1 answer:
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Answer:
Explanation:
First, we will find actual properties at given inlet and outlet states by the use of steam tables:
AT INLET:
At 4MPa and 350°C, from the superheated table:
h₁ = 3093.3 KJ/kg
s₁ = 6.5843 KJ/kg.K
AT OUTLET:
At P₂ = 125 KPa and steam is saturated in vapor state:
h₂ = = 2684.9 KJ/kg
Now, for the isentropic enthalpy, we have:
P₂ = 125 KPa and s₂ = s₁ = 6.5843 KJ/kg.K
Since s₂ is less than and greater than
at 125 KPa. Therefore, the steam is in a saturated mixture state. So:
Now, we will find (enthalpy at the outlet for the isentropic process):
Now, the isentropic efficiency of the turbine can be given as follows:
Answer:
(Option B)
Explanation:
The absolute pressure of the air-filled tank is: