An Interferometric Investigation of the Near Design Point Flow over Supercritical Aerofoil BGK-1,
Abstract
A recently developed laser interferometer was used to study the upper surface flow over supercritical aerofoil BGK-1 near its design condition. The tests were carried out at a chord Reynolds number of 1.65 x 1000000 with transition free and artificially fixed at various chordwise locations. The interferograms were analysed to produce instantaneous surface pressure distributions for comparison with conventional time averaged distributions obtained from surface tappings. The results show that the upper surface flow is unsteady with both fixed and free transition. They also indicate that artificially fixing transition in low Reynolds number tests does not produce an accurate simulation of the high Reynolds number flow for conditions near the design point. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1982
- Accession Number
- ADA118894
Entities
People
- N. Pollock