..30.1:*
NEISE, W.*
Noise and noise abatement in fans and blowers - a review.*
DFVLR-FB 80-16*
1980. `
..30.2:effect of tongue clearance*
GIKADI, T.*
Experimental investigation of the influence of geometry upon the flow conditions and the noise of a centrifugal fan*
DFVLR-FB 81-20*
1981. `
..30.3: 86 cm x 20 cm - return cct with centri blower*
BLAIR, M.F.; BAILEY, D.A.; SCHLINKER, R.H.*
Development of a large-scale wind tunnel for the simulation of turbomachinery airfoil boundary layers*
J.Engg. Power 103, 678*
1981. `
..30.2,17.1: disk valve at entry to centrifugal blower*
AL-ASMI, K.; CASTRO, I.P.*
Production of oscillatory flow in wind tunnels*
Expts. in Fluids 15, 33*
1993. `
..30.2:  hysteresis, blamed on laminar separation*
JOHNSON, A.E.; HANCOCK, P.E.*
Some aspects of centrifugal fan characteristics in blower windtunnels*
Aero. J., Royal Aero. Soc. 101, 481*
1997. `