- #1
Kryptex
- 4
- 0
Hi
I need to perform a material selection case on the rotor of a steam turbine. Both material selection as process selection have to be made.
Since my background is rather chemical than mechanical or material engineering I've encountered some difficulties. I hope you can help me with them.
For the material selection part I considered the yield strength, fracture toughness and maximal service temperature as most important properties to maximize the output per unit mass. By using CES EduPack I became a selection of 5 materials, including low alloy steels, which seem to me as most plausible. Any comments on that?
Further on, for the process selection part, I'm somewhat troubled. I miss some specifications.
First of all: is a rotor usually solid or hollow? Cause I found some contradicting answers to that question. And can its section be considered circular or should I include something to anchor the blades?
Next I assumed following dimensions for a 250MW turbine: 5m length, section radius of about 0.2 m. Is that acceptable?
And to conclude: which processes are common to produce rotors? Forging? Sand casting?
I thank you! It would be a great help!
(to moderators: I posted this in Materials section because of the material selection part, but if you think it should be in a mechanical section because of the subject of study, that's fine.)
I need to perform a material selection case on the rotor of a steam turbine. Both material selection as process selection have to be made.
Since my background is rather chemical than mechanical or material engineering I've encountered some difficulties. I hope you can help me with them.
For the material selection part I considered the yield strength, fracture toughness and maximal service temperature as most important properties to maximize the output per unit mass. By using CES EduPack I became a selection of 5 materials, including low alloy steels, which seem to me as most plausible. Any comments on that?
Further on, for the process selection part, I'm somewhat troubled. I miss some specifications.
First of all: is a rotor usually solid or hollow? Cause I found some contradicting answers to that question. And can its section be considered circular or should I include something to anchor the blades?
Next I assumed following dimensions for a 250MW turbine: 5m length, section radius of about 0.2 m. Is that acceptable?
And to conclude: which processes are common to produce rotors? Forging? Sand casting?
I thank you! It would be a great help!
(to moderators: I posted this in Materials section because of the material selection part, but if you think it should be in a mechanical section because of the subject of study, that's fine.)
Last edited: