As part of the comprehensive refurbishment of the NAL 2m X 2m Transonic Wind Tunnel, the main blower drive system and the auxiliary blower system were replaced. In carrying out the replacement, efforts were made to render the system automated and to increase its energy efficiency as much as possible. As a result: (1) Power savings are, at a tunnel stagnation pressure of 100 kPa, 3,000 kW and 5,000 kW for the main and auxiliary driving systems respectively; (2) The time required for starting and finishing have been substantially reduced, thus contributing to the enhancement of the tunnel operational efficiency; and that (3) The manpower needed for tunnel operation has been greatly reduced by an extensive automating of the Mach number control procedure. A feature of this procedure is incorporation of a feed-forward process derived from the analysis of the manual control data hitherto collected. This report describes how these improvements were achieved.
航技研2m×2m遷音速風洞用送風系設備の更新について
naltm00656.pdf
(1.92MB)
