... the simulation of flowing of real gas.BB50 fan was introduced from Howden, UK, and the ... impeller is back-warded streight, with front-coned disk.Nowadays, by cooperated with NUMATIC Co.(Belgium), adopting ... and stall. The 6-39-B No.10D module fan is developed with the NUMATIC FINE/Turbo software package, ... from the test report, the module 6-39-B No10D raised the efficiency from original 81.3%( ...