| contributor author | Whitfield, Christopher A. | |
| contributor author | Schroeder, Robert P. | |
| contributor author | Thole, Karen A. | |
| contributor author | Lewis, Scott D. | |
| date accessioned | 2017-05-09T01:24:43Z | |
| date available | 2017-05-09T01:24:43Z | |
| date issued | 2015 | |
| identifier issn | 0889-504X | |
| identifier other | turbo_137_09_091004.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/159964 | |
| description abstract | Film cooling and sprayed thermal barrier coatings (TBCs) protect gas turbine components from the hot combustion gas temperatures. As gas turbine designers pursue higher turbine inlet temperatures, film cooling and TBCs are critical in protecting the durability of turbomachinery hardware. One obstacle to the synergy of these technologies is that TBC coatings can block cooling holes when applied to the components, causing a decrease in the film cooling flow area thereby reducing coolant flow for a given pressure ratio (PR). In this study, the effect of TBC blockages was simulated on film cooling holes for widely spaced cylindrical and shaped holes. At low blowing ratios for shaped holes, the blockages were found to have very little effect on adiabatic effectiveness. At high blowing ratios, the areaaveraged effectiveness of shaped and cylindrical holes decreased as much as 75% from blockage. The decrease in areaaveraged effectiveness was found to scale best with the effective momentum flux ratio of the jet exiting the film cooling hole for the shaped holes. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Blockage Effects From Simulated Thermal Barrier Coatings for Cylindrical and Shaped Cooling Holes | |
| type | Journal Paper | |
| journal volume | 137 | |
| journal issue | 9 | |
| journal title | Journal of Turbomachinery | |
| identifier doi | 10.1115/1.4029879 | |
| journal fristpage | 91004 | |
| journal lastpage | 91004 | |
| identifier eissn | 1528-8900 | |
| tree | Journal of Turbomachinery:;2015:;volume( 137 ):;issue: 009 | |
| contenttype | Fulltext | |
