The 'Minituft' Surface Flow Visualisation Method; Experience of Use in the RAE 5m Pressurised Low-Speed Wind Tunnel.
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)
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THe development and use of a minituft surface flow visualisation technique in the RAE 5m Pressurised Low-Speed Wind Tunnel is described. The method uses very fine nylon monofilaments to show surface flow direction. These tufts are made visible by coating them in a fluorescent dye and then illuminating them with a powerful ultra-violet light source. Because of their small size, a large number of tufts may be used without interfering with the flow to a great extent. However, it is shown that if accurate force measurements are required, then it is advisable to test the model in the absence of tufts. Keywords Great Britain Wind tunnels Flow visualisation Test facilities.
- Test Facilities, Equipment and Methods