Biomedical Engineering Reference
In-Depth Information
Two-Stage Rotor
Flow topology and pressure variation of two-stage rotor is described.
Flow Topology
The inlet static pressure was considered to be 60 psi and outlet static
pressure as zero. Rotor's rotational speed was specified as two million rpm
(2,000,000). Flow topology is illustrated in Figure 9. Air entering from the
upper part of the housing (through inlets 1 and 2) is diverted by rotor blades.
One part slides through the upper part of the housing and exits to the
atmosphere through outlets 3 and 4, and the other flows over the rotor blade
into the housing and exits to the atmosphere through the outlets 1 and 2. Fluid
entering from the lower part of the housing (through inlets 3 and 4) is
bifurcated and most of the fluid builds a re-circulation zone in the lower part
of the housing and exits to the atmosphere through outlets 1 and 2 and the
other part flows into the housing, and exits to the atmosphere through outlets 3
and 4. From Figures 4, 6 and 9, it could be observed that the maximum values
of velocity of fluid are different, as the rotational speeds of the rotor are
different. For rotor with high rotational speed, the maximum velocity is high
compared to other rotors.
Reproduced with permission. Copyright retained by Inderscience Publishers.
Figure 8. Static pressure distribution on the rotor with three inclined inlets at an angle
of 45 degrees for half-million rpm rotational speed of rotor.
