Category talk:Gas turbine blades and vanes

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What's a "gas turbine"? Does this mean a turbine used with gases, a turbine that's part of a en:gas turbine, or blades and vanes that form part of a en:gas turbine?

Many of the images here are of compressors, not turbines. They're the compressors of en:gas turbines, but are they within or outside the scope? Andy Dingley (talk) 19:53, 25 January 2013 (UTC)

Good questions -- the usual vocabulary is surprisingly loose. I am progressively working down through all these categories, starting with Category:Turbomachinery, and I hadn’t reached this one yet. My idea is to consistently distinguish/disambiguate "gas turbine" between the air-based turbomachines, and their main mechanical parts, as done with Category:Gas turbines. Here, I hope to redirect the present category to (something along the lines of) Category:Blades and vanes of turbines operating with gases and move some stuff to Category:Blades and vanes of compressors operating with gases. I don’t think making a distinction between blades for (say) turbofan engines and turbine-based ground electrical generators is going to be useful now (many of these are the same anyways).
Even for "compressors" we will have to distinguish between the entire machines (say, electrical air pumps) and the turbomachine parts.
The next elephant in the room is Category:Jet engines and its corresponding subcats (take a look at the contents of Category:Turbines (jet engine)... yikes). There are difficult questions such as whether a turboprop/turboshaft belongs to that, that will have to be answered with a good definition. I hope to tackle that next week or so. Ariadacapo (talk) 08:30, 26 January 2013 (UTC)
Done, moved content to
Ariadacapo (talk) 20:12, 16 February 2013 (UTC)

Sory, but moving the category was unnecessary, and should be reversed. The definition of "gas turbine" is quite clearly described in the article in the English Wikipedia that Andy Dingley linked to. Yes, those "gas turbines" are more than just a turbine, they include a compressor and a combustion chamber and various other things. That may be confusing for the average Wikipedia user, but it is common understanding among those who are familiar with turbomachinery. If you'd take the turbine section out of a gas turbine (if you understand what I mean) and operate it stand-alone, it would be called "gas expansion turbine" (or "turboexpander", for short) rather than "gas turbine". Commons should stick to that standard nomenclature, just like Wikipedia does. --Tetris L (talk) 16:39, 3 September 2013 (UTC)

By the way, the equivalent name is used in many other languages, not just English. Check the list of interwiki links in en:gas turbine. All those articles describe a turbomachine consisting of a compressor, a combustion chamber and an expansion turbine. --Tetris L (talk) 16:42, 3 September 2013 (UTC)
Things were a mess before the present category was moved to a less ambiguous name and Category:Gas turbines was dis-ambiguated. Categories are not only to be a semantic database reference, they also need to be a reliable tool to categorize new files and find existing ones. Using the term "turboexpander" instead of "turbine operating with gases" may be a good idea. Moving Category:Gas turbines (gas-based turbomachinery) back down into Category:Gas turbines (ie. removing disambiguation parenthesis) is not going to bring anything good. Please also be careful not to preach to the choir ("common understanding among those..."). Ariadacapo (talk) 17:20, 3 September 2013 (UTC)
I propose to close the rename proposal now. No scheme has been proposed to replace the current one other than a revert, and things were worse before. Ariadacapo (talk) 19:01, 17 December 2013 (UTC)