| タイトル | Stagnation region gas film cooling: Spanwise angled injection from multiple rows of holes |
| 本文（外部サイト） | http://hdl.handle.net/2060/19810016797 |
| 著者（英） | Lecuyer, M. R.; Luckey, D. W. |
| 著者所属（英） | Purdue Univ. |
| 発行日 | 1981-04-01 |
| 言語 | eng |
| 内容記述 | The stagnation region of a cylinder in a cross flow was used in experiments conducted with both a single row and multiple rows of spanwise angled (25 deg) coolant holes for a range of the coolant blowing ratio with a freestream to wall temperature ratio approximately equal to 1.7 and R(eD) = 90,000. Data from local heat flux measurements are presented for injection from a single row located at 5 deg, 22.9 deg, 40.8 deg, 58.7 deg from stagnation using a hole spacing ratio of S/d(o) = 5 and 10. Three multiple row configurations were also investigated. Data are presented for a uniform blowing distribution and for a nonuniform blowing distribution simulating a plenum supply. The data for local Stanton Number reduction demonstrated a lack of lateral spreading by the coolant jets. Heat flux levels larger than those without film cooling were observed directly behind the coolant holes as the blowing ratio exceeded a particular value. The data were spanwise averaged to illustrate the influence of injection location, blowing ratio and hole spacing. The large values of blowing ratio for the blowing distribution simulating a plenum supply resulted in heat flux levels behind the holes in excess of the values without film cooling. An increase in freestream turbulence intensity from 4.4 to 9.5 percent had a negligible effect on the film cooling performance. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 81N25333
NASA-CR-165333 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/168858 |
