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Freestream Static Pressure Measurements in the T5 Reflected Shock Tunnel

Yu, Wesley M. and Austin, Joanna M. and Hornung, Hans G. (2022) Freestream Static Pressure Measurements in the T5 Reflected Shock Tunnel. In: AIAA SCITECH 2022 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2022-1658.

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In hypervelocity reflected shock tunnels, accurate static pressure measurements are key to interpretation of spectroscopic measurements characterizing the freestream thermodynamic state, as well as in determining the arrival of driver gas in the test section. However, measurements are challenging due to the significant mechanical and aerodynamic loads that are present in such impulse facilities. A static pressure probe was built for use in the T5 Free Piston Shock Tunnel at the California Institute of Technology based on the design of Behrens. Test conditions covered stagnation enthalpy from 8 to 16MJ/kg and freestream pressure from 7 to 27 kPa. With proper protection using silicone gel and tubing, repeatable static pressure measurements with good signal quality and within 2.5% uncertainty were obtained. Nozzle startup processes and driver gas arrival are also evident in the pressure traces. A smaller version of the static pressure probe, more easily accommodated together with models for freestream measurements, was also tested to provide a measure of repeatability and shot-to-shot variation, together with a new companion pitot probe. Static pressure instrument responses are in good agreement with theoretical models and Navier-Stokes simulations.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Presentation
Yu, Wesley M.0000-0002-1133-3199
Austin, Joanna M.0000-0003-3129-5035
Hornung, Hans G.0000-0002-4903-8419
Additional Information:© 2022 by the American Institute of Aeronautics and Astronautics, Inc.
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Other Numbering System NameOther Numbering System ID
AIAA Paper2022-1658
Record Number:CaltechAUTHORS:20220210-928423000
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Official Citation:Wesley M. Yu, Joanna M. Austin and Hans G. Hornung. "Freestream Static Pressure Measurements in the T5 Reflected Shock Tunnel," AIAA 2022-1658. AIAA SCITECH 2022 Forum. January 2022.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113391
Deposited By: George Porter
Deposited On:10 Feb 2022 21:02
Last Modified:10 Feb 2022 22:10

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