NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Development of Unsteady Pressure-Sensitive Paint Application on NASA Space Launch SystemThe 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.
Document ID
20200000245
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Roozeboom, Nettie H. (NASA Ames Research Center Moffett Field, CA, United States)
Powell, Jessie (NASA Johnson Space Center Houston, TX, United States)
Baerny, Jennifer K. (NASA Ames Research Center Moffett Field, CA, United States)
Murakami, David D. (NASA Ames Research Center Moffett Field, CA, United States)
Li, Jie (Aerospace Computing, Inc. Mountain View, CA, United States)
Ngo, Christina L. (NASA Ames Research Center Moffett Field, CA, United States)
Garbeff, Theodore J. (NASA Ames Research Center Moffett Field, CA, United States)
Ross, James C. (NASA Ames Research Center Moffett Field, CA, United States)
Flach, Ross (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
January 13, 2020
Publication Date
January 6, 2020
Subject Category
Aerodynamics
Report/Patent Number
ARC-E-DAA-TN76119
Meeting Information
Meeting: AIAA SciTech Forum
Location: Orlando, FL
Country: United States
Start Date: January 6, 2020
End Date: January 10, 2020
Sponsors: American Institute of Aeronautics and Astronautics (AIAA)
Funding Number(s)
CONTRACT_GRANT: NNA16BD26C
Distribution Limits
Public
Copyright
Public Use Permitted.
Technical Review
Single Expert

Related Records

There are no records associated with this record.
No Preview Available