Matches in SemOpenAlex for { <https://semopenalex.org/work/W761170060> ?p ?o ?g. }
Showing items 1 to 74 of
74
with 100 items per page.
- W761170060 abstract "Aerodynamic stability is an important parameter in the design of compressors for aircraft gas turbine engines. Compression system instabilities can cause compressor surge, which may lead to the loss of an aircraft. As a result, engine designers include a margin of safety between the operating line of the engine and the stability limit line of the compressor. The margin of safety is typically referred to as Achieving the highest possible level of surge margin while meeting design point performance objectives is the goal of the compressor designer. However, performance goals often must be compromised in order to achieve adequate levels of surge margin. Techniques to improve surge margin will permit more aggressive compressor designs. Centrifugal compressor surge margin improvement was demonstrated at the NASA Glenn Research Center by injecting air into the vaned diffuser of a 4:1-pressure-ratio centrifugal compressor. Tests were performed using injector nozzles located on the diffuser hub surface of a vane-island diffuser in the vaneless region between the impeller trailing edge and the diffuser-vane leading edge. The nozzle flow path and discharge shape were designed to produce an air stream that remained tangent to the hub surface as it traveled into the diffuser passage. Injector nozzles were located near the leading edge of 23 of the 24 diffuser vanes. One passage did not contain an injector so that instrumentation located in that passage would be preserved. Several orientations of the injected stream relative to the diffuser vane leading edge were tested over a range of injected flow rates. Only steady flow (nonpulsed) air injection was tested. At 100 percent of the design speed, a 15-percent improvement in the baseline surge margin was achieved with a nozzle orientation that produced a jet that was bisected by the diffuser vane leading edge. Other orientations also improved the baseline surge margin. Tests were conducted at speeds below the design speed, and similar results were obtained. In most cases, the greatest improvement in surge margin occurred at fairly low levels of injected flow rate. Externally supplied injection air was used in these experiments. However, the injected flow rates that provided the greatest benefit could be produced using injection air that is recirculating between the diffuser discharge and nozzles located in the diffuser vaneless region. Future experiments will evaluate the effectiveness of recirculating air injection." @default.
- W761170060 created "2016-06-24" @default.
- W761170060 creator A5058657062 @default.
- W761170060 date "2002-03-01" @default.
- W761170060 modified "2023-09-24" @default.
- W761170060 title "Centrifugal Compressor Surge Margin Improved With Diffuser Hub Surface Air Injection" @default.
- W761170060 cites W2801630720 @default.
- W761170060 hasPublicationYear "2002" @default.
- W761170060 type Work @default.
- W761170060 sameAs 761170060 @default.
- W761170060 citedByCount "0" @default.
- W761170060 crossrefType "journal-article" @default.
- W761170060 hasAuthorship W761170060A5058657062 @default.
- W761170060 hasConcept C119599485 @default.
- W761170060 hasConcept C120665830 @default.
- W761170060 hasConcept C121332964 @default.
- W761170060 hasConcept C127413603 @default.
- W761170060 hasConcept C131097465 @default.
- W761170060 hasConcept C146978453 @default.
- W761170060 hasConcept C153005164 @default.
- W761170060 hasConcept C154108245 @default.
- W761170060 hasConcept C199104240 @default.
- W761170060 hasConcept C2779570065 @default.
- W761170060 hasConcept C2780565730 @default.
- W761170060 hasConcept C28317120 @default.
- W761170060 hasConcept C2982854487 @default.
- W761170060 hasConcept C56200935 @default.
- W761170060 hasConcept C66938386 @default.
- W761170060 hasConcept C78519656 @default.
- W761170060 hasConcept C95277225 @default.
- W761170060 hasConceptScore W761170060C119599485 @default.
- W761170060 hasConceptScore W761170060C120665830 @default.
- W761170060 hasConceptScore W761170060C121332964 @default.
- W761170060 hasConceptScore W761170060C127413603 @default.
- W761170060 hasConceptScore W761170060C131097465 @default.
- W761170060 hasConceptScore W761170060C146978453 @default.
- W761170060 hasConceptScore W761170060C153005164 @default.
- W761170060 hasConceptScore W761170060C154108245 @default.
- W761170060 hasConceptScore W761170060C199104240 @default.
- W761170060 hasConceptScore W761170060C2779570065 @default.
- W761170060 hasConceptScore W761170060C2780565730 @default.
- W761170060 hasConceptScore W761170060C28317120 @default.
- W761170060 hasConceptScore W761170060C2982854487 @default.
- W761170060 hasConceptScore W761170060C56200935 @default.
- W761170060 hasConceptScore W761170060C66938386 @default.
- W761170060 hasConceptScore W761170060C78519656 @default.
- W761170060 hasConceptScore W761170060C95277225 @default.
- W761170060 hasLocation W7611700601 @default.
- W761170060 hasOpenAccess W761170060 @default.
- W761170060 hasPrimaryLocation W7611700601 @default.
- W761170060 hasRelatedWork W1019406940 @default.
- W761170060 hasRelatedWork W1557404410 @default.
- W761170060 hasRelatedWork W1565052062 @default.
- W761170060 hasRelatedWork W1566252300 @default.
- W761170060 hasRelatedWork W2030890783 @default.
- W761170060 hasRelatedWork W2052326915 @default.
- W761170060 hasRelatedWork W2283861182 @default.
- W761170060 hasRelatedWork W244942788 @default.
- W761170060 hasRelatedWork W2945827368 @default.
- W761170060 hasRelatedWork W410069924 @default.
- W761170060 hasRelatedWork W761979367 @default.
- W761170060 hasRelatedWork W937908161 @default.
- W761170060 hasRelatedWork W2834966116 @default.
- W761170060 hasRelatedWork W2835993707 @default.
- W761170060 hasRelatedWork W2836362597 @default.
- W761170060 hasRelatedWork W2858110401 @default.
- W761170060 hasRelatedWork W2881651881 @default.
- W761170060 hasRelatedWork W3098875125 @default.
- W761170060 hasRelatedWork W3148749130 @default.
- W761170060 hasRelatedWork W3180552141 @default.
- W761170060 isParatext "false" @default.
- W761170060 isRetracted "false" @default.
- W761170060 magId "761170060" @default.
- W761170060 workType "article" @default.