DISCUSSION OF TWO DIMENSIONAL PROFILE TESTS AND TRANSFORMATION TO INFINITE MEDIUM
CRITIQUE DES ESSAIS BIDIMENSIONNELS DE PROFILS ET TRANSPORTATION AU MILIEU INFINI
Difficulties observed in transonic profile evaluations are discussed. At zero lift, corrections are necessary because of the effect of pressure orifice size on pressure determination, mainly in large pressure gradient regions (leading edge). A correcting formula valid up to Mach 0.5 is given for C sub z not zero wall effects which introduce flow perturbation. A theoretical method using this formula and based on the model singularity technique is described. Comparison of results for either infinite medium, guided flow, or perforated wall demonstrates guided flow, shows greater similarity to infinite medium in the transonic condition. Perforated walls, on the other hand, practically eliminate blocking phenomena.
- Presented at the 14th Collog. d'Aerondynamique Appliques, Toulouse, 7-9 November 1977.
Association Aeronautique & Astronautique de FranceParis, France
- Bousquet, J
- Pujol, C
- Publication Date: 1977
- Pagination: 94 p.
- TRT Terms: Airfoils; Instruments for measuring loads or pressure; Measurement; Porosity; Porous materials; Pressure; Two dimensional flow; Wind tunnels
- Uncontrolled Terms: Boundaries; Profiles
- Old TRIS Terms: Guide vanes; Pressure measurements; Supersonic test apparatus; Transonic flow
- Subject Areas: Aviation; Vehicles and Equipment;
- Accession Number: 00198527
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: AAAF-NT-78-04
- Files: TRIS
- Created Date: Oct 17 1980 12:00AM