| タイトル | Force Measurement Improvements to the National Transonic Facility Sidewall Model Support System |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160007765 |
| 著者（英） | Cagle, C. Mark; Jones, Gregory S.; Chan, David; Butler, David; Milholen, William E., II; Goodliff, Scott L.; Balakrishna, Sundareswara |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 2016-01-04 |
| 言語 | eng |
| 内容記述 | The National Transonic Facility is a transonic pressurized cryogenic facility. The development of the high Reynolds number semi-span capability has advanced over the years to include transonic active flow control and powered testing using the sidewall model support system. While this system can be used in total temperatures down to -250 F for conventional unpowered configurations, it is limited to temperatures above -60 F when used with powered models that require the use of the high-pressure air delivery system. Thermal instabilities and non-repeatable mechanical arrangements revealed several data quality shortfalls by the force and moment measurement system. Recent modifications to the balance cavity recirculation system have improved the temperature stability of the balance and metric model-to-balance hardware. Changes to the mechanical assembly of the high-pressure air delivery system, particularly hardware that interfaces directly with the model and balance, have improved the repeatability of the force and moment measurement system. Drag comparisons with the high-pressure air system removed will also be presented in this paper. |
| NASA分類 | Research and Support Facilities (Air) |
| レポートNO | NF1676L-23076 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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