Cone-Probe Rake Design and Calibration for Supersonic Wind Tunnel Models (Paperback) (ISBN-13: 9781287242673)

A series of experimental investigations were conducted at the NASA Langley Unitary Plan Wind Tunnel (UPWT) to calibrate cone-probe rakes designed to measure the flow field on 1-2% scale, high-speed wind tunnel models from Mach 2.15 to 2.4. The rakes were developed from a previous design that exhibited unfavorable measurement characteristics caused by a high probe spatial density and flow blockage from the rake body. Calibration parameters included Mach number, total pressure recovery, and flow angularity. Reference conditions were determined from a localized UPWT test section flow survey using a 10deg supersonic wedge probe. Test section Mach number and total pressure were determined using a novel iterative technique that accounted for boundary layer effects on the wedge surface. Cone-probe measurements were correlated to the surveyed flow conditions using analytical functions and recursive algorithms that resolved Mach number, pressure recovery, and flow angle to within +/-0.01, +/-1% and +/-0.1deg, respectively, for angles of attack and sideslip between +/-8deg. Uncertainty estimates indicated the overall cone-probe calibration accuracy was strongly influenced by the propagation of measurement error into the calculated results.


Author: Nasa Technical Reports Server (Ntrs),Mark J. Won
ISBN-10: 1287242677
ISBN-13: 9781287242673
Publisher: Bibliogov
Language: English
Published: 07/23/2013
Pages: 316
Format: Paperback
Weight: 1.25lbs
Size: 9.69h x 7.44w x 0.66d