Questions tagged [turbomachinery]
The turbomachinery tag has no usage guidance.
8
questions with no upvoted or accepted answers
1
vote
1
answer
166
views
Pressure recovery in turbomachinery
Diffusers in turbomachinery are used to transfer some of the kinetic energy of the fluid to pressure energy and to direct the fluid to the ducting/second stage/... I understand this and the mechanism ...
- 33
1
vote
0
answers
27
views
Turbocharger boost control using two valves with a vac and boost reference for wide boost control range
Can someone explain how the above boost control setup would work. The valve on the left uses a vac source applied to the top of the diaphram which would effectively help hold the spring closed at high ...
- 111
1
vote
1
answer
276
views
How do I calculate the force coming from the centrifugal compressor exhaust?
Let's say I have a centrifugal compressor as shown in the figure and I know the following parameters----1
Thrust
Inlet and outlet pressure
Power required to operate the compressor
Inlet and outlet ...
- 121
0
votes
0
answers
20
views
Turbomachines numerical please help
A twin jet Pelton wheel has a mean runner diameter of 1.68
m & runs at 500rpm, each jet is of dia. 152 mm. The net
head is 510 m. Bucket turns the jet through 1650 & relative
velocity is ...
- 1
0
votes
0
answers
32
views
What drives the mass flow rate in axial turbofan between the compressor and the turbine when compressor is fully choked?
I haven't found the answer in the forum or elsewhere, but maybe I have searched badly, in which case please forgive me in advance.
For a steady nominal operation of a turbofan, I have heard that the ...
- 1
0
votes
1
answer
22
views
Centrifugal pump head-flow prediction with CFD
Given a volute pump casing, the impeller, and RPM how would one obtain a simulated head-flow graph? As for what I have seen in research papers most methods already assume input flowrate / pressure and ...
0
votes
0
answers
62
views
How is the number of blades on a centrifugal compressor determined?
If I know the tip and hub diameter of a centrifugal compressor ,the inlet velocity and outlet velocity, how do I determine the number of blades on a centrifugal compressor?
- 121
0
votes
1
answer
48
views
What does the author mean? Turbomachinery - Reaction
I am reading a book of Fundamental Energy Systems.
The author describes the rate of change in head for a turbomachine as:
$$ \frac{1}{2}[(V_1^2-V_2^2)+(U_1^2-U_2^2)+(V_{R2}^2-V_{R1}^2)] = H =U_1V_{u1} ...
- 271