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- W2367123313 abstract "PIV experiment and numerical simulation were utilized to study the non- reaction flow field downstream of the single- swirler and the multi- swirler, which had the same twin- stage structure. Velocity fields,vortex structures and variation of vorticity in both cases were compared and analyzed to study the effects of different boundary conditions on vortex structure of twin-stage swirler. The results of PIV experiment and numerical simulation agreed well on the structure and variation of the central vortex vorticity. In the single-swirler case, two couples of corner vortex were formed due to the interaction between the swirl- flow of swirler and walls,and in the multi-swirler case,a vortex located on the boundary between two swirlers called boundary vortex was formed due to the interaction between the swirl-flow of the swirlers. The vortex intensity of the central vortex in the single-swirler case was always smaller than that in the multi-swirler case before the jets from primary holes,specifically,at a distance of 10 mm from the outlet of the swirlers. The results of numerical simulation show that the vortex intensity of the central vortex in the single-swirler case was 92.4% of that in the multi-swirler case,while the results of PIV experimental show that the value was 90.0%. The jets from the primary holes enhanced the vortex intensity of the central vortex,and such effect was more significant in the single-swirler case.The difference of vortex structure located in external fluid under different boundary conditions resulted in the different variation of the central vortex vorticity." @default.
- W2367123313 created "2016-06-24" @default.
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- W2367123313 date "2015-01-01" @default.
- W2367123313 modified "2023-09-22" @default.
- W2367123313 title "Effects of Boundary Conditions on Downstream Vorticity from Twin-Stage Swirlers" @default.
- W2367123313 hasPublicationYear "2015" @default.
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