Matches in SemOpenAlex for { <https://semopenalex.org/work/W2045361767> ?p ?o ?g. }
Showing items 1 to 68 of
68
with 100 items per page.
- W2045361767 endingPage "150" @default.
- W2045361767 startingPage "149" @default.
- W2045361767 abstract "In this paper, the tip leakage vortex was studied in a subsonic linear turbine cascade that was modeled from a typical high-pressure turbine stage. Due to a large streamwise adverse pressure gradient induced by the strong tip leakage vortex, vortex breakdown was observed and further examined. Vortex breakdown was accompanied by a sharp increase in swirl number and high mixing loss. In the vortex-vortex interaction simulations, a Rankine vortex flow was simulated numerically according to the complex turbine rotor inlet conditions. Ten quasi-steady, equally spaced phases between the incoming vortex and the blade in one pitch period were investigated for flow patterns and loss details. At a certain phase, the tip leakage vortex breakdown was significantly suppressed due to the vortex interactions. The upstream positive vortex was gradually entrained into the leakage flow. By improving the turbulent mixing between the leakage vortex and the incoming vortex, the streamwise momentum within the leakage core was enhanced. The vortex interactions weakened the adverse pressure gradient by eliminating the streamwise vorticity of the leakage vortex. By examining the vorticity transport equation, it's found that the viscous diffusion of vorticity dominated the leakage vorticity damping. The dilation effect also contributed to vorticity transportation as it operated in the subsonic, high-temperature, high-pressure turbine environment. It was surprising that the baroclinicity effect caused by the transportation of low temperature fluid was found to take part in the vorticity evolution in the current subsonic cascade. The associated loss was significantly reduced when vortex breakdown was suppressed.Different incoming vortex strengths were also tested. As the positive vorticity magnitude increased, the incoming flow tended to amplify the vortex interaction effect. When the vorticity magnitude was beyond a certain threshold, the vortex breakdown was no more observed. However, when the negative vortex was imposed upstream of the blade, the incoming vortex flow was transported radially downward and hardly interacted with the tip leakage flow. The leakage vortex breakdown was almost the same as that in the uniform inlet case. The vortex transportation was clearly captured with the help of passive scalar released from the incoming vortex core. By simulating a triple-vortex interaction, we developed a better understanding of vortex kinematic evolution." @default.
- W2045361767 created "2016-06-24" @default.
- W2045361767 creator A5072728957 @default.
- W2045361767 date "1990-04-01" @default.
- W2045361767 modified "2023-10-18" @default.
- W2045361767 title "Ultrasonic properties of microbbulble-based contrast agents: Backscatter, attenuation and velocity" @default.
- W2045361767 doi "https://doi.org/10.1016/0161-7346(90)90207-e" @default.
- W2045361767 hasPublicationYear "1990" @default.
- W2045361767 type Work @default.
- W2045361767 sameAs 2045361767 @default.
- W2045361767 citedByCount "0" @default.
- W2045361767 crossrefType "journal-article" @default.
- W2045361767 hasAuthorship W2045361767A5072728957 @default.
- W2045361767 hasConcept C121332964 @default.
- W2045361767 hasConcept C139719470 @default.
- W2045361767 hasConcept C140820882 @default.
- W2045361767 hasConcept C141069875 @default.
- W2045361767 hasConcept C162157250 @default.
- W2045361767 hasConcept C162324750 @default.
- W2045361767 hasConcept C168475990 @default.
- W2045361767 hasConcept C176738000 @default.
- W2045361767 hasConcept C192562407 @default.
- W2045361767 hasConcept C196558001 @default.
- W2045361767 hasConcept C200114574 @default.
- W2045361767 hasConcept C205634578 @default.
- W2045361767 hasConcept C2777042071 @default.
- W2045361767 hasConcept C56751440 @default.
- W2045361767 hasConcept C57879066 @default.
- W2045361767 hasConcept C77576233 @default.
- W2045361767 hasConcept C91432469 @default.
- W2045361767 hasConceptScore W2045361767C121332964 @default.
- W2045361767 hasConceptScore W2045361767C139719470 @default.
- W2045361767 hasConceptScore W2045361767C140820882 @default.
- W2045361767 hasConceptScore W2045361767C141069875 @default.
- W2045361767 hasConceptScore W2045361767C162157250 @default.
- W2045361767 hasConceptScore W2045361767C162324750 @default.
- W2045361767 hasConceptScore W2045361767C168475990 @default.
- W2045361767 hasConceptScore W2045361767C176738000 @default.
- W2045361767 hasConceptScore W2045361767C192562407 @default.
- W2045361767 hasConceptScore W2045361767C196558001 @default.
- W2045361767 hasConceptScore W2045361767C200114574 @default.
- W2045361767 hasConceptScore W2045361767C205634578 @default.
- W2045361767 hasConceptScore W2045361767C2777042071 @default.
- W2045361767 hasConceptScore W2045361767C56751440 @default.
- W2045361767 hasConceptScore W2045361767C57879066 @default.
- W2045361767 hasConceptScore W2045361767C77576233 @default.
- W2045361767 hasConceptScore W2045361767C91432469 @default.
- W2045361767 hasIssue "2" @default.
- W2045361767 hasLocation W20453617671 @default.
- W2045361767 hasOpenAccess W2045361767 @default.
- W2045361767 hasPrimaryLocation W20453617671 @default.
- W2045361767 hasRelatedWork W1671892521 @default.
- W2045361767 hasRelatedWork W2019788347 @default.
- W2045361767 hasRelatedWork W2027260240 @default.
- W2045361767 hasRelatedWork W2092862021 @default.
- W2045361767 hasRelatedWork W2097362920 @default.
- W2045361767 hasRelatedWork W2231760039 @default.
- W2045361767 hasRelatedWork W4205519338 @default.
- W2045361767 hasRelatedWork W601254495 @default.
- W2045361767 hasRelatedWork W1549692353 @default.
- W2045361767 hasRelatedWork W178329542 @default.
- W2045361767 hasVolume "12" @default.
- W2045361767 isParatext "false" @default.
- W2045361767 isRetracted "false" @default.
- W2045361767 magId "2045361767" @default.
- W2045361767 workType "article" @default.