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Abstract: Experimental
study on the performance characteristics line of the turbine flow sensor
is made, with a high precision experimental facility, which can regulate
the viscosity and the flow of the diesel oil, and another one for the
flow of the water. It is found that a zigzag appears at the performance
characteristics line of the different sample of turbine flow sensor at
low flow rate, even changing the characteristics of the fluid that is
measured. The rang of the zigzag variation is great than ±0.5%. But the
value of Reynolds number, where the second peak appears, varies when the
characteristics of the liquid and the sample of the turbine flow sensor
are changed. The analysis of this phenomenon and the stress of the rotor
are shown. The boundary layer flow is formed when the fluid passes the
turbine flow sensor. The transition of the modes of flow in the boundary
layer leads a sudden increase of the driving torque of the rotor. Maybe,
this is the reason for the zigzag variation of the line.
Key words: Turbine
flow sensor Performance characteristics line Boundary layer
Modes of flow Transition
CLC No: TH814
Received 20030509, received in
revised form 20030908
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