Such as the turbine itself, impellers, compressor blades, etc.
Just have some questions for you, doing a small project for my one manufacturing class and sources havent come in too handy.
Please pm or discuss here, thanks!
Some of that stuff is IP intensive… You may not get good answers.
Post up what you are looking for. Honeywell does all of our turbos for CAT, we basicly give them all of the information on the engine and they send us a few turbos to test. Any minor change in the turbo, we have to test and validate with back to back tests. I have some limited knowledge but I probably have some resources at work.
well my assignment after having some experience with feature cam is developing a proposal for a CNC machine that develops turbine blades. I already have the layout with the differences between 3 and 5 axis machining, how the blades are originally constructed from start to finish, but part of the proposal deals with the surfaces of the blades. I know that any type of ding or divet along the blade edge/surface will significantly alter performance in moving air, but I cannot find too much detail on the important surfaces of the blades themselves
What i know from turbine engines and prototype turbos i have seen, they all have as machined surfaces, but very finely machined on the cold side, and very finely abrasive blasted hot sides. We have 1 piece 17 in compressor fans on our new jet that are 1 piece machined titanium. Beautiful pieces that cost about 100k a piece.
I don’t have any numbers for standard surface finish for turbos/turbines. The surface finish requirement will depend on the type of turbo you are using for your project also. There is a lot of discussion about VGT Turbos, “standard” turbos, Variable Nozzle turbo and vaneless twin flow turbos mainly because of emissions and the ability to drive EGR.
As long as the turbo is above the Surge limit on the Comperssor Operating Region map, I would say run it 
Sorry I couldn’t be more help.
this proposal is just a general statement, doesnt have to be anything in particular, something that would apply to all turbine blades