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An Eccentric Cylindrical Single Hole Pneumatic Probe with High Spatial Measurement Accuracy

A technology with high measurement accuracy and high space, which can be used in aerodynamic tests, measurement devices, and machine/structural component testing. The effect of processing size

Active Publication Date: 2021-10-29
中国空气动力研究与发展中心空天技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the porous probe is used to measure flow field parameters with strong velocity gradients such as wakes or boundary layers, the spatial gradient of the velocity magnitude will be misinterpreted because the holes of the porous probe are located at spatially separated points is the flow angle, resulting in flow field measurement error

Method used

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  • An Eccentric Cylindrical Single Hole Pneumatic Probe with High Spatial Measurement Accuracy
  • An Eccentric Cylindrical Single Hole Pneumatic Probe with High Spatial Measurement Accuracy
  • An Eccentric Cylindrical Single Hole Pneumatic Probe with High Spatial Measurement Accuracy

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Experimental program
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Embodiment 1

[0038] The outer diameter of the capillary 1 of this embodiment is 1mm, the inner diameter is 0.6mm, and a pressure measuring hole 101 with a diameter of 0.1mm is opened at a position 3mm away from the sealing place at the front end of the capillary 1, and the length of the front end of the capillary 1 protruding from the front section 201 of the probe head is The tail of the capillary 1 protrudes from the rear section 205 of the probe head to a length of 10 mm, and the tail of the capillary 1 is connected to the pressure measuring hose. The diameter of the front section of the stepped hole 203 is 1mm, and the diameter of the rear section of the stepped hole 203 is 2mm. In the rear section of the stepped hole 203, the capillary 1 and the probe head 2 are adhered and fixed by an adhesive. The outer diameters of the middle section 202 of the probe head and the pole 3 are both 8 mm. The middle section 202 of the probe head is provided with upper and lower two parallel positioning...

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Abstract

The invention discloses an eccentric cylinder single-hole pneumatic probe with high spatial measurement accuracy. The eccentric cylindrical single-hole pneumatic probe includes a capillary, a probe head and a support rod; the front end of the capillary is closed and the rear end is open, and a pressure measuring hole is opened on the front wall of the tube; the probe head is a conical frustum, a cylinder and a screw in turn. The probe head is provided with a step hole that runs through the front and back, the central axis of the step hole is parallel to the central axis of the probe head, and the distance between the two central axes is the capillary radius; the support rod is fixedly connected with the screw rod. The front and rear ends of the capillary extend out of the step hole, the pressure measuring hole at the front end is located on the central axis of the probe head, and the rear end connects the pressure measuring hose in the support rod, leading the pressure felt by the pressure measuring hole to the pressure sensor for Measurement. The eccentric cylindrical single-hole pneumatic probe has higher spatial measurement accuracy, simple processing and manufacturing, and low cost, and is suitable for accurate measurement of parameters such as air flow angle, Mach number, total pressure and static pressure in two-dimensional flow fields with strong velocity gradients.

Description

technical field [0001] The invention belongs to the technical field of aeroengine impeller mechanical aerodynamic testing, and in particular relates to an eccentric cylindrical single-hole pneumatic probe with high spatial measurement accuracy. Background technique [0002] Porous probes have been widely used to measure the magnitude and direction of flow field velocity, total pressure and static pressure and other aerodynamic parameters. However, when the porous probe is used to measure flow field parameters with strong velocity gradients such as wakes or boundary layers, the spatial gradient of the velocity magnitude will be misinterpreted because the holes of the porous probe are located at spatially separated points is the flow angle, resulting in flow field measurement errors. In order to reduce this measurement error, it is necessary to reduce the size of the measuring probe head as much as possible or reduce the spatial distance of the measuring hole. Contents of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/06
CPCG01M9/06
Inventor 陈峰李聪谭锡容叶敏岳少原李鹏袁磊江辉王素洁
Owner 中国空气动力研究与发展中心空天技术研究所
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