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Help with flow rates... part 2
A convergent divergent nozzle has an initial diameter of 1m this then reduces in size to 0.5 and finally expands to 2m the initial flow rate 22 m^3/s and the relative density of the fluid is 0.45
I worked out the areas of the first two diameters
∏X1^2/4 = 0.785
∏X0.5^2/4=0.196
Next I'd divide the small answer into the large one.
0.785/0.196=4.005
Then I multiplied this answer by the previous flow,rate
4.005x22=88m^3/s
Now the flow rate through the 0.5 diameter is 88m^3/s
To work out the velocity of flow rearrange the equation of flow rate flow rate/surface area
88/0.196=448.97
And I worked out the velocity of diameter a too.
22/0.785=28.02
Next I worked out the surface area of the 2m diameter
∏X2^2/4=3.141
Next I divided the surface area of the 0.5m diameter Into the 2m diameters surface area.
3.141/0.196=16.02
Now use the rearranged flowrate equation that I used earlier to get the velocity of flow.
16.02/3.141=5.1
Velocity for diameters:
1m=28.02m/s
0.5m=91.66m/s
2m=5.1m/s
For part b it is relatively easy
Surface area x relative density x velocity
For dia 1m 0.785x0.45x28.02= 9.891 kg/s
For dia 0.5m 0.196x0.45x91.66= 8.08 kg/s
For dia 2m 3.141x0.45x5.1=7.2063
I'm a little rusty to say the least on flowrates and I would appreciate comments on weather This is right?
Homework Statement
A convergent divergent nozzle has an initial diameter of 1m this then reduces in size to 0.5 and finally expands to 2m the initial flow rate 22 m^3/s and the relative density of the fluid is 0.45
Homework Equations
The Attempt at a Solution
I worked out the areas of the first two diameters
∏X1^2/4 = 0.785
∏X0.5^2/4=0.196
Next I'd divide the small answer into the large one.
0.785/0.196=4.005
Then I multiplied this answer by the previous flow,rate
4.005x22=88m^3/s
Now the flow rate through the 0.5 diameter is 88m^3/s
To work out the velocity of flow rearrange the equation of flow rate flow rate/surface area
88/0.196=448.97
And I worked out the velocity of diameter a too.
22/0.785=28.02
Next I worked out the surface area of the 2m diameter
∏X2^2/4=3.141
Next I divided the surface area of the 0.5m diameter Into the 2m diameters surface area.
3.141/0.196=16.02
Now use the rearranged flowrate equation that I used earlier to get the velocity of flow.
16.02/3.141=5.1
Velocity for diameters:
1m=28.02m/s
0.5m=91.66m/s
2m=5.1m/s
For part b it is relatively easy
Surface area x relative density x velocity
For dia 1m 0.785x0.45x28.02= 9.891 kg/s
For dia 0.5m 0.196x0.45x91.66= 8.08 kg/s
For dia 2m 3.141x0.45x5.1=7.2063
I'm a little rusty to say the least on flowrates and I would appreciate comments on weather This is right?