| タイトル | Experimental study of combustion in a turbulent free shear layer formed at a rearward facing step |
| 著者（英） | Daily, J. W.; Pitz, R. W. |
| 著者所属（英） | California Univ. |
| 発行日 | 1981-01-01 |
| 言語 | eng |
| 内容記述 | A premixed propane-air flame is stabilized in a turbulent free shear layer formed at a rearward facing step. The mean and rms averages of the turbulent velocity flow field are determined by LDV for both reacting (equivalence ratio 0.57) and nonreacting flows (Reynolds number 15,000-37,000 based on step height). The effect of combustion is to shift the layer toward the recirculation zone and reduce the flame spread. For reacting flow, the growth rate is unchanged except very near the step. The probability density function of the velocity is bimodial near the origin of the reacting layer and single-peaked but often skewed elsewhere. Large-scale structures dominate the reacting shear layer. Measurements of their passing frequency from LDV are consistent with high-speed Schlieren movies of the reacting layer and indicate that the coalescence rate of the eddies in the shear layer is reduced by combustion. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 81A20607
AIAA PAPER 81-0106 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/418244 |
