1987 Volume 53 Issue 493 Pages 2714-2719
Pressure drop of axial air flow through an annulus with a rotating inner cylinder was experimentally studied The results obtained are as follows : (1) When the outer cylinder surface is smooth, secondary flow called Taylor-vortexes occurs in the annular gap. Using a dimensionless number X=Re2a/Rw (Rea : Reynolds number, Rw : rotating Reynolds numbers ; Both number are based on hydraulic diameter.), the friction factor λ can be expressed by λ=2.2Xlt;-1/2> (X<= 5000), and λ=0.072X-0.1 (X >= 5000) (2) When the outer cylinder surface is deep-slotted, secondary flow occurs in the sloths. The friction factor can then be expressed by λ=3.25X-1/2 (X< 4000), and λ=0.275X-1/5(X> 4000).
Transactions of the Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers Series A
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
