Three Dimensional Velocity and Scalar Field Measurements of an Airfoil Trailing Edge With Slot Film Cooling: The Effect of an Internal Structure in the SlotSource: Journal of Turbomachinery:;2013:;volume( 135 ):;issue: 003::page 31018Author:Ling, Julia
,
Yapa, Sayuri D.
,
Benson, Michael J.
,
Elkins, Christopher J.
,
Eaton, John K.
DOI: 10.1115/1.4007520Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Measurements of the 3D velocity and concentration fields were obtained using magnetic resonance imaging for a pressureside cutback film cooling experiment. The cutback geometry consisted of rectangular slots separated by straight lands; inside each of the slots was an airfoilshaped blockage. The results from this trailing edge configuration, the “island airfoil,†are compared to the results obtained with the “generic airfoil,†a geometry with narrower slots, wider, tapered lands, and no blockages. The objective was to determine how the narrower lands and internal blockages affected the average film cooling effectiveness and the spanwise uniformity. Velocimetry data revealed that strong horseshoe vortices formed around the blockages in the slots, which resulted in greater coolant nonuniformity on the airfoil breakout surface and in the wake. The thinner lands of the island airfoil allowed the coolant to cover a larger fraction of the trailing edge span, giving a much higher spanwiseaveraged surface effectiveness, especially near the slot exit where the generic airfoil lands are widest.
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| contributor author | Ling, Julia | |
| contributor author | Yapa, Sayuri D. | |
| contributor author | Benson, Michael J. | |
| contributor author | Elkins, Christopher J. | |
| contributor author | Eaton, John K. | |
| date accessioned | 2017-05-09T01:03:10Z | |
| date available | 2017-05-09T01:03:10Z | |
| date issued | 2013 | |
| identifier issn | 0889-504X | |
| identifier other | turb_135_3_031018.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/153339 | |
| description abstract | Measurements of the 3D velocity and concentration fields were obtained using magnetic resonance imaging for a pressureside cutback film cooling experiment. The cutback geometry consisted of rectangular slots separated by straight lands; inside each of the slots was an airfoilshaped blockage. The results from this trailing edge configuration, the “island airfoil,†are compared to the results obtained with the “generic airfoil,†a geometry with narrower slots, wider, tapered lands, and no blockages. The objective was to determine how the narrower lands and internal blockages affected the average film cooling effectiveness and the spanwise uniformity. Velocimetry data revealed that strong horseshoe vortices formed around the blockages in the slots, which resulted in greater coolant nonuniformity on the airfoil breakout surface and in the wake. The thinner lands of the island airfoil allowed the coolant to cover a larger fraction of the trailing edge span, giving a much higher spanwiseaveraged surface effectiveness, especially near the slot exit where the generic airfoil lands are widest. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Three Dimensional Velocity and Scalar Field Measurements of an Airfoil Trailing Edge With Slot Film Cooling: The Effect of an Internal Structure in the Slot | |
| type | Journal Paper | |
| journal volume | 135 | |
| journal issue | 3 | |
| journal title | Journal of Turbomachinery | |
| identifier doi | 10.1115/1.4007520 | |
| journal fristpage | 31018 | |
| journal lastpage | 31018 | |
| identifier eissn | 1528-8900 | |
| tree | Journal of Turbomachinery:;2013:;volume( 135 ):;issue: 003 | |
| contenttype | Fulltext |