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Related Concept Videos

Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

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Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
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Instrument Calibration01:12

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Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
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The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe
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Design and Test of an Integrated Measurement System for Multi-Hole Probe Calibration and Vortex Measurement.

Tao Yao1, Shudao Zhou1,2, Song Ye1

  • 1College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410073, China.

Sensors (Basel, Switzerland)
|March 26, 2022
PubMed
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A novel multi-directional rotatable testing system was developed for calibrating multi-hole probes. This system accurately measures flow fields and detects periodic vortices around cylinders.

Keywords:
flow around a cylindermulti-hole probetest systemvortexwind tunnel experiment

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Area of Science:

  • Fluid dynamics
  • Experimental fluid mechanics
  • Aerodynamics

Background:

  • Multi-hole probes are essential for measuring flow fields, including velocity, direction, and vortex information in 3D space.
  • Accurate calibration of multi-hole probes is crucial for reliable flow field measurements.
  • Existing calibration systems may lack the flexibility to test probes at all necessary angles and positions.

Purpose of the Study:

  • To design and validate a three-coordinate, multi-directional rotatable testing system for multi-hole probe calibration.
  • To enable precise measurement of flow fields at any position and orientation.
  • To verify the system's capability in detecting vortex information.

Main Methods:

  • Development of a three-coordinate, multi-directional rotatable testing system.
  • Calibration of a hemispherical seven-hole probe using the developed system.
  • Measurement of the flow field around cylinders of varying diameters.
  • Data mining techniques applied to multi-hole probe data for vortex detection.

Main Results:

  • The test system successfully calibrated a hemispherical seven-hole probe.
  • Pressure distribution and vortex shedding frequency were accurately obtained for flow around cylinders.
  • The system demonstrated its effectiveness for multi-angle and multi-azimuth testing.
  • Periodic vortices were successfully detected through data mining of probe measurements.

Conclusions:

  • The designed testing system provides a versatile and accurate platform for multi-hole probe calibration.
  • This system enhances the ability to characterize complex flow fields and identify vortex dynamics.
  • The validated system contributes to more precise fluid flow analysis in various scientific and engineering applications.