- #1
sinedine
- 4
- 0
these are the following data:
diameter(pipe)=0.1m
diameter(throat)=0.05m
difference in pressure=55kpa
Cd=0.98
question requires me to find the volume flow rate.
1)i know i need to find h(diff in pressure/density*gravity)
i have a doubt here where can i just leave the pressure in kpa or must i change it to pa??
2)from there i know i can find volume flow rate=sq root of [ (2gh)/ (A1/A2)^2 -1],where A1=surface of pipe and A2=surface area of throat(this formula is where my doubt lies in cause i have seen other variations!is this formula correct in the 1st place)
3)finally Q (actual)= Q (theor)*Cd
i am not quite sure of what i am doing in step 2 is correct because i have come across another formula in which Q= Cd*surface area(throat)*sq root of (2gh)!but while i use this formula my ans are not the same!can someone help me with doubt.
diameter(pipe)=0.1m
diameter(throat)=0.05m
difference in pressure=55kpa
Cd=0.98
question requires me to find the volume flow rate.
1)i know i need to find h(diff in pressure/density*gravity)
i have a doubt here where can i just leave the pressure in kpa or must i change it to pa??
2)from there i know i can find volume flow rate=sq root of [ (2gh)/ (A1/A2)^2 -1],where A1=surface of pipe and A2=surface area of throat(this formula is where my doubt lies in cause i have seen other variations!is this formula correct in the 1st place)
3)finally Q (actual)= Q (theor)*Cd
i am not quite sure of what i am doing in step 2 is correct because i have come across another formula in which Q= Cd*surface area(throat)*sq root of (2gh)!but while i use this formula my ans are not the same!can someone help me with doubt.