Hi everyone,

Does anybody have an idea of what the free stream turbulence intensity is in a cascade wind tunnel? I've downloaded all the NACA reports of cascade tests, but the only mention they give of turbulence intensity is that it is very low.

Such information you will usually find in descriptions of the wind tunnels. First find out which windtunnel was used in the report, and then search the website of that lab.

for cascade analysis use turbulence intensity of 0.5%.