The key measurement to acquire for understanding unsteady flow is surface pressure. Unsteady Pressure-Sensitive Paint (uPSP) is an emerging optical technique used in wind tunnel testing to measure fluctuating surface pressures. Recently, tests were conducted on NASA’s Space Launch System in NASA Ames Research Center’s Unitary Plan Wind Tunnel to determine the aeroacoustics environment and assist in developing the buffet forcing functions. Unsteady PSP data was collected during this test campaign. Steady state PSP data, infrared thermography, shadowgraph, accelerometer data, and dynamic pressure transducer data were also collected. In all 50 TB of data were collected during the three days of testing. During these three days of testing, a repeating transonic and supersonic alpha sweep condition was acquired. This paper presents these two wind tunnel conditions and examines how the temperature influences the PSP data. In the first large demonstration of uPSP in 2015 on an NESC-, AETC-sponsored wind tunnel test, lifetime PSP results highlighted the influence the model temperature had on the PSP data. A best practice of heat soaking the model before acquiring calibration images was followed during the test campaign presented in this paper. An infrared thermography camera and thermocouples were installed in the model to collect more details of the model surface temperature. Data processing schemes for uPSP are still in development but will be briefly presented here as well.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Development of Unsteady Pressure-Sensitive Paint Application on NASA Space Launch System



    Conference:

    AIAA SciTech Forum ; 2020 ; Orlando, FL, United States


    Publication date :

    2020-01-06


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Development of Unsteady Pressure-Sensitive Paint Application on NASA Space Launch System

    Roozeboom, Nettie / Powell, Jessica / Baerny, Jennifer et al. | AIAA | 2019


    AIAA-2019-3502: Development of Unsteady Pressure-Sensitive Paint Application on NASA Space Launch System

    Roozeboom, Nettie / Powell, Jessica / Baerny, Jennifer et al. | British Library Conference Proceedings | 2019


    Unsteady Pressure-Sensitive Paint Application on NASA’s Space Launch System

    Roozeboom, Nettie / Powell, Jessica M. / Baerny, Jennifer et al. | AIAA | 2019


    COHERENCE ANALYSIS OF THE SPACE LAUNCH SYSTEM USING UNSTEADY PRESSURE SENSITIVE PAINT

    Soranna, Francesco / Sekula, Martin K. / Heaney, Patrick S. et al. | TIBKAT | 2021


    Coherence Analysis of the Space Launch System using Unsteady Pressure Sensitive Paint

    Francesco Soranna / Patrick S. Heaney / Martin K. Sekula et al. | NTRS