Effects of vortex generators on the growth of a compressible shear layer

1992 ◽  
Vol 8 (5) ◽  
pp. 1049-1056 ◽  
Author(s):  
D. S. Dolling ◽  
E. Fournier ◽  
Y. R. Shau
Keyword(s):  
Shear Layer ◽  
Vortex Generators

Mass/Heat Transfer in a Ribbed Passage With Cylindrical Vortex Generators: The Effect of Generator-Rib Spacing

1999 ◽  
Vol 122 (4) ◽  
pp. 641-652 ◽  
Author(s):  
S. Acharya ◽  
R. G. Hibbs ◽  
Y. Chen ◽  
D. E. Nikitopoulos
Keyword(s):  
Heat Transfer ◽  
Shear Layer ◽  
Sherwood Number ◽  
Vortex Generator ◽  
Vortex Generators ◽  
Single Element ◽  
Cylindrical Vortex ◽  
Study Results ◽  
Lower Heat ◽  
Layer Development

The effect of vortex generators on the heat transfer from internally ribbed passages is studied experimentally using a mass transfer technique. Cylindrical vortex generators placed directly above the ribs have been used in this study. Results are reported on the effect of the spacing between the vortex generator and the ribs. Detailed distributions of the Sherwood number contours and the centerline Sherwood number distributions are presented. Reynolds number values of 5000, 10,000, and 30,000 are studied and three generator-rib-spacing/rib-height (s/e) values of 0.55, 1, and 1.5 are considered. It is shown that at small generator-rib spacings (s/e=0.55), the two act as a single element, and lead to a retardation of the shear layer development past the reattachment point. This is generally associated with lower heat transfer. At a larger generator-rib spacing (s/e=1.5), the generator wake and the rib shear layer interact with each other to promote mixing and heat transfer. [S0022-1481(00)02103-4]

Mass/Heat Transfer in a Ribbed Blade Coolant Passage With Cylindrical Vortex Generators: The Effect of Generator-Rib Spacing

1997 ◽  
Author(s):  
Richard G. Hibbs ◽  
Sumanta Acharya ◽  
Yi Chen ◽  
Dimitris E. Nikitopoulos
Keyword(s):  
Heat Transfer ◽  
Shear Layer ◽  
Sherwood Number ◽  
Vortex Generator ◽  
Vortex Generators ◽  
Single Element ◽  
Cylindrical Vortex ◽  
Study Results ◽  
Lower Heat ◽  
Layer Development

The effect of vortex-generators on the heat transfer from the internally ribbed passages of a turbine blade coolant channel is studied experimentally using a mass-transfer technique. Cylindrical vortex-generators placed directly above the ribs have been used in this study. Results are reported on the effect of the spacing between the vortex-generator and the ribs. Detailed distributions of the Sherwood number contours and the centerline Sherwood number distributions are presented. Three generator-rib-spacing/rib-height (s/e) values of 0.55, 1, and 1.5 are considered. It is shown that at small generator-rib spacings (s/e = 0.55), the two act as a single element, and lead to a retardation of the shear layer development past the reattachment point. This is generally associated with lower heat transfer. At a larger generator-rib spacing (s/e = 1.5), the generator-wake and the rib-shear-layer interact with each other to promote mixing and heat transfer.

ABSOLUTE INSTABILITY OF A SUPERCRITICAL SHEAR LAYER

2016 ◽  
Vol 26 (8) ◽  
pp. 815-826 ◽  
Author(s):  
Qing-fei Fu ◽  
Li-Jun Yang ◽  
Chao-Jie Mo
Keyword(s):  
Shear Layer ◽  
Absolute Instability
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