Force Measurement Improvements to the National Transonic Facility Sidewall Mounted Support System

Autor: Scott L. Goodliff, William E. Milholen, Gregory S. Jones, C. Mark Cagle, Sundareswara Balakrishna, David Butler, David T. Chan
Rok vydání: 2016
Předmět:
Zdroj: 54th AIAA Aerospace Sciences Meeting.
DOI: 10.2514/6.2016-0648
Popis: 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 -250Â F for conventional unpowered configurations, it is limited to temperatures above -60Â 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.
Databáze: OpenAIRE
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