| タイトル | Rotational effects on impingement cooling |
| 著者（英） | Kerrebrock, J. L.; Koo, J. J.; Epstein, A. H.; Preiser, U. Z. |
| 著者所属（英） | Massachusetts Inst. of Tech. |
| 発行日 | 1987-01-01 |
| 言語 | eng |
| 内容記述 | The present consideration of rotation effects on heat transfer in a radially exhausted, impingement-cooled turbine blade model gives attention to experimental results for Reynolds and Rossby numbers and blade/coolant temperature ratio values that are representative of small gas turbine engines. On the basis of a model that encompasses the effects of Coriolis force and buoyancy on heat transfer, bouyancy is identified as the cause of an average Nusselt number that is 20-30 percent lower than expected from previous nonrotating data. A heuristic model is proposed which predicts that the impingement jets nearest the blade roots should deflect inward, due to a centripetal force generated by their tangential velocity counter to the blade motion. Potentially serious thermal stresses must be anticipated from rotation effects in the course of blade design. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 87A45838 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/376695 |
