Full-flow direction flow velocity measurement probe and measurement method thereof

Abstract

The invention discloses a full-flow direction flow velocity measurement probe and a measurement method of the full-flow direction flow velocity measurement probe, and relates to the field of measurement of fluid velocity and direction. The probe comprises eight pressure measuring holes at the spherical probe head and eight pressure guide tubes led out from the tail of the probe and is characterized in that the probe head is spherical, the eight pressure measuring holes are uniformly distributed on the sphere, and thus when the pressure measuring holes are watched from the forward directions from the front and back, left and right and up and down, four pressure measuring holes are uniformly distributed in the six forward directions. In the measurement process, by taking the apparently maximum total pressure as reference, the zone of the incoming flow is judged, and in combination with the apparent total pressure of the zone, the pressures on the four holes of the zone, the flow velocity coefficient, the angle coefficient and the like, the flow velocity and flow direction are calculated; the flow velocity measurement probe has the advantages of simple structure, low cost, wide flow direction detection range and the like; and the flow velocity measurement probe can be widely applied to the three-dimensional flow field measurement of engineering and scientific research.

Description

technical field [0001] The invention relates to the field of fluid flow measurement, in particular to a method for measuring flow velocity in all flow directions, which can solve the problem of fluid measurement in special and complicated occasions. Background technique [0002] Flow measurement is an important direction of fluid mechanics, and the measurement of velocity and direction of complex flow field is even more difficult in flow measurement. At present, commonly used flow measurement equipment includes Pitot tube, five-hole probe, seven-hole probe, laser Doppler Le measuring instrument, particle image velocimeter, etc. Pitot tube has a simple structure, but when measuring, the Pitot tube requires that the angle between the incoming flow and its axis does not exceed 5 degrees, otherwise the measurement error will be large. Five-hole and seven-hole probes can realize the measurement of more complex flow fields, but their capabilities are limited. Expanding this rang...

AI Technical Summary

Problems solved by technology

The Pitot tube has a simple structure, but when measuring, the Pitot tube requires that the angle between the incoming flow and its axis does not exceed 5 degrees, otherwise the measurement error will be large

Five-hole and seven-hole probes can realize the measurement of more complex flow fields, but their capabilities are limited. Expanding this range to -70°-70°, many complex flow fields are still unmeasured

Laser Doppler and particle image velocimetry are expensive, and the calibration is complicated and error-prone, and often the difference is a thousand miles away.

Images