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Recent content by DonkeyPhysics

  1. DonkeyPhysics

    long term effects of using lower than design pressure at turbine inlet

    Yeah, what's changing is me repeating the question to get them to explain the problem to me completely. Unfortunately, at this point, my only sources of information are my boss (who asked me the question in the hallway a month ago, shortly before I had an unpredicted 3 week absence), and an...
  2. DonkeyPhysics

    where/how to add pressure gages to measure stage pressures

    fyi, the goal here for the monitoring is to be able to more rapidly identify leakages or other losses during normal operation.
  3. DonkeyPhysics

    where/how to add pressure gages to measure stage pressures

    Hi there, I work for an electric company who periodically has to due efficiency tests on our plant turbines. Related to one of those, we're looking to modify a 5-stage, axial, condensing, geothermal steam turbine, to add pressure ports for stage pressures, to facilitate more detailed on-going...
  4. DonkeyPhysics

    long term effects of using lower than design pressure at turbine inlet

    Yeah, right after asking this question, I realized I don't have enough information yet to do a real investigation. The question was asked to me as a theoretical question in general, not specifically applied (as of yet) to a specific turbine. However, in going back to ask for more information...
  5. DonkeyPhysics

    long term effects of using lower than design pressure at turbine inlet

    We've got a case where due to less than ideal function of our steam drier, we've got steam coming to a turbine with a higher moisture content than is desired. To compensate for this, they're currently running the machine with lower inlet pressure (higher steam consumption) to drop the moisture...
  6. DonkeyPhysics

    Upstream boilers for removal of high % content of NCGs (i.e.~ 20%)

    We have a small (5MW) "portable" single-flash, 4 stage axial impulse turbine (MHI) (Inlet T,P, M_dot = 158°C, 589kPa, 72,500kg/hr). Original design was for 0.6% NCG. In its new, more permanent location however, the NCG is much higher, on the order of 20% (comparable with Kizildere, Turkey)...
  7. DonkeyPhysics

    Constructing 2D Velocity Diagrams for Axial Flow Steam Turbines

    Partly to bump the thread, in case anybody might have some answers, and partly to add new info... I looked at AxStream turbine analysis software, and it looks like that software uses the mean camber line to indicate the blade and stator angles. That being said, there are still many examples...
  8. DonkeyPhysics

    Constructing 2D Velocity Diagrams for Axial Flow Steam Turbines

    dangit. failed again. Alright, I give up. I tried to upload a brand new, different but equivalent pic, and it gave me the same "Duplicate Header" error, so I'm gonna just stop trying for now. Long story short, I'm trying to figure out how to measure the blade entry and exit angles, relative...
  9. DonkeyPhysics

    Constructing 2D Velocity Diagrams for Axial Flow Steam Turbines

    Seems the second attachment failed, so here it is again.http://files.engineering.com/getfile.aspx?folder=f90b2d27-eaaf-4249-bd29-8876ede1256a&file=Steam_Path,_mean_blade_height,_E2.png
  10. DonkeyPhysics

    Constructing 2D Velocity Diagrams for Axial Flow Steam Turbines

    Howdy, I'm a new steam turbine engineer, working on my first project, but in a fairly new department such that I don't have anybody here with more experience in this particular area. I've been reading as many textbooks, papers and other internet resources as I can find, and I can't find a...
  11. DonkeyPhysics

    Constructing 2D Velocity Diagrams for Axial Flow Steam Turbines

    wish I could edit my posts. Sorry. First link didn't work in second post. Second link seems to. Here is the final pic.http://files.engineering.com/getfile.aspx?folder=a559fc64-b1de-42f9-b8fb-4d658436569e&file=Steam_Path,_mean_blade_height,_E2.png
  12. DonkeyPhysics

    Constructing 2D Velocity Diagrams for Axial Flow Steam Turbines

    OK, it looks like only one of my attachments uploaded in my original post. Here (hopefully) are the other two.http://files.engineering.com/getfile.aspx?folder=d0f2315b-03cd-4184-8cae-ba3252c97fb5&file=Steam_Path,_mean_blade_height,_E2.png...
  13. DonkeyPhysics

    Constructing 2D Velocity Diagrams for Axial Flow Steam Turbines

    Hi there, I've been reading as many textbooks, papers and other internet resources as I can find, and I can't find a definitive answer to this question. I need to construct (mid-span) 2D velocity diagrams for existing blades. My problem is that I can't seem to find information about which...
  14. DonkeyPhysics

    Hex balloon vs Triangle Balloon

    Hey Kenat, your reply popped up while I was typing mine. I have never heard of ASME Y14.10-2004 or ASME Y14.35M-1997 , and don't currently have access to them, so... I'll have to answer "I dunno" to those. As for my example case, my old company (from whence this example drawing came) used...
  15. DonkeyPhysics

    Hex balloon vs Triangle Balloon

    THanks Kenat. I looked through those threads (and also several others that included various combinations of the key words "balloon", "flag" "note", "hex", etc, but I'm still not coming up with anything concrete. Basically, what I think I understand now is that flag notes (not balloons, as I...
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