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Influence of bypass ratio on subsonic and correctly expanded sonic co-flowing jets with finite lip thickness.
- Source :
- Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering; Jun2019, Vol. 233 Issue 8, p2536-2548, 13p
- Publication Year :
- 2019
-
Abstract
- The effects of bypass ratio on co-flowing subsonic and correctly expanded sonic jet decay have been studied experimentally. Co-flowing jets with lip thickness 1.0 D<subscript>p</subscript> (where D<subscript>p</subscript> is the diameter of primary nozzle and is equal to 10 mm) with bypass ratios of around 0.7, 1.4, and 6.4 at primary jet exit Mach numbers 0.6, 0.8, and 1.0 have been analyzed. A single free jet equivalent to primary nozzle of the co-flowing nozzle was considered for comparison. Primary jet centerline total pressure decay, spread, and static pressure variation were investigated. The results show that the mixing of the high bypass ratio co-flowing jet with lip thickness 1.0 D<subscript>p</subscript> is superior to low bypass ratio co-flowing jet. Both lip thickness and bypass ratio have a strong influence on the co-flowing jet mixing. Bypass ratio 6.3 experiences a significantly higher mixing than bypass ratio 0.7 and 1.4. Selected jets were also investigated computationally. The computations capture the salient flow physics and reproduce well with the experiments. [ABSTRACT FROM AUTHOR]
- Subjects :
- STATIC pressure
LIPS
MACH number
SUBSONIC flow
RATIO & proportion
Subjects
Details
- Language :
- English
- ISSN :
- 09544100
- Volume :
- 233
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 136916940
- Full Text :
- https://doi.org/10.1177/0954410018782511