| タイトル | Mean velocity, turbulence intensity, and scale in a subsonic turbulent jet impinging normal to a large flat plate |
| 本文（外部サイト） | http://hdl.handle.net/2060/19770025487 |
| 著者（英） | Brinich, P. F.; Boldman, D. R. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1977-09-01 |
| 言語 | eng |
| 内容記述 | To explain the increase in noise when a jet impinges on a large flat plate, mean velocity, turbulence intensity, and scale were measured at nominal nozzle-exit velocities of 61, 138, and 192 meters per second with the plate located 7.1 nozzle-exit diameters from the nozzle. The maximum turbulence intensities in free and impinging jets were about the same; however, the integral length scale near the plate surface was only about one-half the free jet scale. The measured intensities and length scales, in conjunction with a contemporary theory of aerodynamic noise, provided a good explanation for the observed increase in noise associated with the impinging jet. An increase in the volume of highly turbulent flow could be the principal reason for the increase in noise. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 77N32431
E-8998
NASA-TP-1037 |
| 権利 | No Copyright |
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