| タイトル | Space Launch System Base Heating Test: Tunable Diode Laser Absorption Spectroscopy |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160001826 |
| 著者（英） | MacLean, Matthew; Carr, Zak; Mehta, Manish; Parker, Ron; Dufrene, Aaron |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 2016-01-04 |
| 言語 | eng |
| 内容記述 | This paper describes the Tunable Diode Laser Absorption Spectroscopy (TDLAS) measurement of several water transitions that were interrogated during a hot-fire testing of the Space Launch Systems (SLS) sub-scale vehicle installed in LENS II. The temperature of the recirculating gas flow over the base plate was found to increase with altitude and is consistent with CFD results. It was also observed that the gas above the base plate has significant velocity along the optical path of the sensor at the higher altitudes. The line-by-line analysis of the H2O absorption features must include the effects of the Doppler shift phenomena particularly at high altitude. The TDLAS experimental measurements and the analysis procedure which incorporates the velocity dependent flow will be described. |
| NASA分類 | Launch Vehicles and Launch Operations; Fluid Mechanics and Thermodynamics |
| レポートNO | M16-4999 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
