Abstract
Abstract : Tests were conducted in the wind tunnel, to determine the tunnel calibration and centerline Mach number distributions. The wall porosity in the test section is remotely variable using a sliding cutoff plate design. The walls were recently modified to allow upstream movement of these cutoff plates instead of the original downstream movement for decreasing porosity. During the tests, Mach number was varied from 0.10 to 1.35, test section wall angle from -0.5 to 0.5 deg, test section wall porosity from 0- to 10-percent open area, and stagnation pressure from 1000 to 3500 psfa. Some data were obtained showing the effects of humidity. Acceptably uniform Mach number distributions were obtained at wall porosities up to 7-percent open area, a marked improvement over the original wall design. The tunnel plenum-stream calibration relationship was determined to be dependent upon Mach number, wall angle, wall porosity, and humidity but nominally independent of stagnation pressure level.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
