European transonic wind tunnel | Wikipedia audio article

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Europea...


00:00:55 1 Tunnel parameters
00:01:43 2 Wind tunnel circuit
00:02:51 2.1 Test Section
00:03:41 3 Tunnel instrumentation



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SUMMARY
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The European transonic wind tunnel (ETW) is a high-Reynolds-number transonic wind tunnel using nitrogen as test gas.
It is one of the world's largest cryogenic wind tunnels. It is situated in Cologne, Germany. ETW was constructed and is operated by the four European countries France, Germany, Great Britain and The Netherlands. The ETW is in operation since 1994.ETW provides real-flight Reynolds numbers by virtue of both increased pressure and decreased temperature. Independent variation of Reynolds number and aero elastic loading can be done there. They specialize in Flight Reynolds number testing for full-span and semi-span models at cruise conditions and extreme borders of flight envelope.