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Title: Rochwell Workshop
Author: Zane Wade Don Kuest
Source: 1971 Western Gas Measurement Short Course
Year Published: 1971
Abstract: The Turbo. Meter utilizes a vane type turbine rotor to sense the velocity of the gas stream through a fixed flow area. This rotor is suspended by bearings with the direction of rotation perpendicular to the gas flow. The blades on the outer diameter of the rotor are set at about a 450 angle to the direction of flow. As the flowing gas strikes these blades, there will be an energy transfer from the kinetic energy of the gas to the rotating energy in the rotor. The available kinetic energy in the gas is a function of the mass of flowing gas and velocity of the gas. In an ideal turbine the angular velocity of the rotor would be directly proportional to the gas velocity. However, in an actual turbine, as in any physical system, there will be certain losses from retarding torque that will affect the proportionaltty of the velocities. Basically these losses fall into two categories, those due to mechanical conditions and those due to fluid conditions. Since the rotor speed is proportional to the gas velocity and hence gas flow rate, it becomes a simple matter to interpose the necessary reduction gears to come out with a calibrated index

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