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Measuring method and device suitable for near wall distance

A measurement method and distance technology, applied in the field of measurement methods and devices for near-wall distances, to achieve the effects of improved accuracy, simple principle, and easy implementation

Active Publication Date: 2018-12-21
北京飞擎科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The distance between the existing probe and the first point on the wall is often roughly estimated, or ignored; accurate measurement of the distance between the hot wire probe and the first point on the wall has always been a difficult problem

Method used

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  • Measuring method and device suitable for near wall distance
  • Measuring method and device suitable for near wall distance
  • Measuring method and device suitable for near wall distance

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the specific implementation of the method and device for measuring the near-wall distance of the present invention will be further described in detail through the following examples and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] The disclosure relates to the field of boundary layer velocity measurement, in particular to the measurement of the distance between the probe and the wall when a hot wire probe measures near the wall. Specifically, in this disclosure, in order to solve the problem of measuring the distance between the hot wire probe and the wall in the measurement of the hot wire in the boundary layer, the present disclosure proposes a measurement method suitable for the distance near the wall, and speci...

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Abstract

The invention discloses a measuring method suitable for a near wall distance. The measuring method comprises: presetting a probe; moving a detector of the preset probe so that the detector is close toa wall surface of a rotating boundary layer; and measurement of the near wall distance is completed when the detector is electrically connected to a preset feeler gauge. According to the measuring method suitable for the near wall distance, the distance between a first point of the hot wire detector and the wall surface can be accurately measured and precision is greatly improved compared with atraditional coarse estimation method; meanwhile, the method is simple in principle and easy to realize; further, the method can not only measure the distance, but also precisely control the distance between the first point of the hot wire probe and the wall surface through the thickness of the feeler gauge, and high efficiency and usability are achieved. The invention further discloses a measuringdevice suitable for the near wall distance.

Description

technical field [0001] The invention relates to the technical field of testing and measurement, in particular to a measuring method and device suitable for near-wall distances. Background technique [0002] In the study of boundary layer velocity measurement, hot wire anemometer is often used to measure boundary layer velocity. In the process of measuring the speed of the hot wire anemometer, the distance between the hot wire probe and the wall is a very important quantity. The velocity gradient near the wall and the shear stress of the wall need to be calculated through the wall distance. [0003] The distance between the existing probe and the first point on the wall is often roughly estimated, or ignored; accurate measurement of the distance between the hot wire probe and the first point on the wall has always been a difficult problem. Contents of the invention [0004] Based on this, it is necessary to provide a method and device suitable for measuring the near-wall d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/16
Inventor 由儒全陶智李海旺朱剑琴周晟鋆徐天彤
Owner 北京飞擎科技有限公司