Thanks for your comment Chestermiller much appreciated.
So I have now used the following Darcy equation for turbulent flow
Hf=4LCfUm^2/2gd
(Cf obtained from Moody diagram)
So = 4*27*0.004*0.9^2 / 2*9.81*0.12
Hf=0.143m of fluid.
Is this the correct method??
Cheers.
1. Homework Statement
a) Calculate the theoretical diameter of pipe, nominal pipe diameter and mean velocity of nominal pipe diameter.
Maximum velocity = 1.8m/s
Q(vol. flow rate) = 0.01M^3-1
b) Find the Reynolds number for the process and then the head loss due to friction, state any...
Hello Steamking,
Thanks very much for your help the penny has finally dropped!
I think I wouldn't have got there if you hadn't of pointed me in the right direction.
Thanks again much appreciated.
When I do as you suggested -
The ang. acc.of the flywheel is the moment of inertia of the flywheel divided by the torque. For a constant torque, the ang. acc. is constant.
This gives me the figure I had worked out for the Output shaft Torque not the Input shaft Torque value!
Disregard above...
I had worked out the ang. vel for each 5 sec interval and then was messing around to check it and input ang. vel for 300rpm divided by acceleration to get the time taken. So 10pi/0.167pi = 59.98sec ...
So is how I worked out each ang. vel correct?
i.e final ang vel=initial and vel +...
Ok so I worked out my constant acceleration from this kinematic equation
final ang speed=initial ang speed + acceleration . time using 60sec as per question for time. Then using the constant acceleration figure I changed the time in the equation to 5sec.10sec etc to work out all the angular...
Thanks for your reply.
P=T. angular velocity
I was thinking today I have worked out the input torque and input power required when the output shaft is at 300rpm so do I work out the input power from 60rpm down to 0 I.e at rest. But how can I do this if I only know the rpm eg 50,40,30etc...
Hello,
Homework Statement
A gearbox and flywheel are as shown in FIGURE 4. The output shaft
rotates in the opposite direction to the input shaft at 5 times its speed.
The gearbox has an efficiency of 92%.
If the flywheel is solid, has a mass of 50 kg, a diameter of 1.5 m and is to...
Apologies was very tired when posted that yesterday!
Here is the rest of the question.
Carry out the following:
(a) Design a gear train which satisfies the above criteria. Use a sketch to
illustrate your design, label the gears A, B, C, etc. from the driver to
the driven gear, and state...
Hello please see my problem below,
1. A gear train is to be designed to transmit power from shaft 1 to shaft 2
with the following condition:
(i) Shaft 1 (driven by an electric motor) rotates at 100 revs min–1.
(ii) Shaft 2 is to rotate at 400 revs min–1 in the opposite direction to shaft
1...