The Design of Wind Tunnels and Wind Tunnel Propellers (1919)
NASA Technical Reports Server (NTRS) · leaf 23
22 ANNUAL REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS. It is reasonable to suppose, in view of the betterjfilling of the exit cone and of the generally improved velocity distribution, that the energy ratio would be increased by inclosing the stream, and this supposition [was fully justified… … D/stance fro *7i Axis (Cm.) Fig. H. of the propeller the wind speed was increased while the power consumption was decreased, and the power consumption for a given wind spec \ was decreased just about 50 per cent. The energy ratio with the inclosing tube was 1.83 for the whole installation, or,…
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