| タイトル | Pressure Measurement in Supersonic Air Flow by Differential Absorptive Laser-Induced Thermal Acoustics |
| 本文（外部サイト） | http://hdl.handle.net/2060/20090011252 |
| 著者（英） | Herring, Gregory C.; Balla, Robert J.; Hart, Roger C. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 2007-01-01 |
| 言語 | eng |
| 内容記述 | Nonintrusive, off-body flow barometry in Mach-2 airflow has been demonstrated in a large-scale supersonic wind tunnel using seedless laser-induced thermal acoustics (LITA). The static pressure of the gas flow is determined with a novel differential absorption measurement of the ultrasonic sound produced by the LITA pump process. Simultaneously, stream-wise velocity and static gas temperature of the same spatially-resolved sample volume were measured with this nonresonant time-averaged LITA technique. Mach number, temperature and pressure have 0.2%, 0.4%, and 4% rms agreement, respectively, in comparison with known free-stream conditions. |
| NASA分類 | Fluid Mechanics and Thermodynamics |
| レポートNO | LF99-4843 |
| 権利 | No Copyright |
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