A 3d-piv measurement device and method for the flow field of the blade wheel rim gap of a mixed flow pump

Abstract

The invention discloses a 3D-PIV measurement device and method of a mixed-flow pump vane rim clearance flow field. The device comprises a pump shaft, a vane wheel, a guide vane, a rotary wheel chambersection, a guide vane outlet pipe section and a 3D-PIV measurement system; the vane wheel and the guide vane are connected together through the pump shaft; the rotary wheel chamber section is installed at the front end of the vane wheel; the guide vane outlet pipe section is installed on the guide vane end; the rotary wheel chamber section and the guide vane outlet pipe section are connected to form a mixed-flow pump body; the interior of the rotary wheel chamber section and the interior of the guide vane outlet pipe section are in smooth transition to form a smooth integrity; the rotary wheel chamber section is made of transparent materials; a triangular prism protrusion is arranged on the outer side of the rotary wheel chamber section; the 3D-PIV measurement system comprises a CCD camera, a vane light source laser and a computer; the CCD camera and the vane light source laser are connected with the computer; shooting of the mixed-flow pump vane rim clearance flow field is achieved;and the mixed-flow pump vane rim clearance flow field is reflected truly and fully.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery (pump) internal flow, and in particular relates to a 3D-PIV measuring device and method for the gap flow field of blade wheel flanges of a mixed flow pump. Background technique [0002] Mixed-flow pumps are widely used in various fields such as farmland irrigation and drainage, waterlogging and flood control, industrial municipal, sewage treatment, and papermaking due to their large flow and moderate head. However, the structure of the mixed-flow pump is special, the fluid is sucked axially along the impeller inlet and flows out obliquely, and the curvature of the impeller end wall area has a great influence. At the same time, there is a small gap between the rim of the impeller blade of the mixed-flow pump and the end wall of the runner chamber, which may easily cause gap jet flow and rim leakage flow, increase the energy loss of the fluid in the impeller, and cause the performance of the...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the existing PIV measurement method cannot realize the measurement of the flow field of the rim gap of the mixed-flow pump, and provide a 3D-PIV measurement device and method for the flow field of the rim gap of the mixed-flow pump blade, so as to realize the measurement of the rim gap of the mixed-flow pump. Capture of interstitial flow field

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