Experimental Study of Flow Structure over a 75° Swept Delta Wing with External Stores
碩士 === 大葉大學 === 機械工程研究所 === 82 === An experimental study of the leading edge vortices over a 75° swept delta wing with external stores is presented. A com- bination of flow visualization technique and fiber-optic laser doppler velocimeter m...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1994
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| Online Access: | http://ndltd.ncl.edu.tw/handle/32495437559984010700 |
| Summary: | 碩士 === 大葉大學 === 機械工程研究所 === 82 === An experimental study of the leading edge vortices over a 75°
swept delta wing with external stores is presented. A com-
bination of flow visualization technique and fiber-optic laser
doppler velocimeter measurements were used to study the leading
edge vortex formation and breakdown for the delta wing with a
set of external stores. The external stores had characteristic
incidence angles of 20°,45°,90°;characteristic width of 15
or 30 mm. The flow structure was examined for angles of attack
from 25°to 40°at Reynolds number of 1.75×10 based on the
root chard. Vortex breakdown was observed on all the tests of
the wing with external stores. The visualization and velocity
field survey data shows that the external stores made vortex
breakdown occur early and the core flow transform abruptly from
a jet-like flow to a wake-like flow. The result also revealed
the external stores induced vortex breakdown was more steady
than the natural breakdown.
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