Author Information

En Yen Justin ChuFollow

Is this project an undergraduate, graduate, or faculty project?

Undergraduate

individual

Authors' Class Standing

En Yen Justin Chu, Senior

Lead Presenter's Name

En Yen Justin Chu

Faculty Mentor Name

J. Gordon Leishman; Zheng Zhang

Abstract

The project studies and performs the calibration of a miniature seven-hole pressure probe designed to be utilized in the new wind tunnel of the Embry-Riddle Research Park. The seven-hole pressure probe is to measure flow angularity, which has better sensivity than conventional five-hole pressure probe. However, the seven-hole probe requires calibration due to manufacturing tolerance and its small dimensions.

The seven-hole pressure probe is attached to a rotary table allowing the probe to change its pitch and yaw angle within the wind tunnel test section. Data is gathered from combinations of pitch and yaw angles between -10 to 10 degrees, with a step of 0.5 degree. Data gathered in initial wind tunnel tests were utilized for zero-angle offset correction for both pith and yaw angle. A time-series samples were recorded to determine how long the flow settles once pitch and yaw angle is altered. Calibration was then done with polynomial curve fit on MATLAB. An application of the wind tunnel test will also be performed to validate the calibration coefficients. A multiple 7-hole sensor rake also will be proposed which can be used to efficiently scan a large-scale wind tunnel test section, such as the new low-speed wind tunnel at the research park.

Did this research project receive funding support (Spark or Ignite Grants) from the Office of Undergraduate Research?

No

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Wind Tunnel Seven-Hole Pressure Probe Calibration

The project studies and performs the calibration of a miniature seven-hole pressure probe designed to be utilized in the new wind tunnel of the Embry-Riddle Research Park. The seven-hole pressure probe is to measure flow angularity, which has better sensivity than conventional five-hole pressure probe. However, the seven-hole probe requires calibration due to manufacturing tolerance and its small dimensions.

The seven-hole pressure probe is attached to a rotary table allowing the probe to change its pitch and yaw angle within the wind tunnel test section. Data is gathered from combinations of pitch and yaw angles between -10 to 10 degrees, with a step of 0.5 degree. Data gathered in initial wind tunnel tests were utilized for zero-angle offset correction for both pith and yaw angle. A time-series samples were recorded to determine how long the flow settles once pitch and yaw angle is altered. Calibration was then done with polynomial curve fit on MATLAB. An application of the wind tunnel test will also be performed to validate the calibration coefficients. A multiple 7-hole sensor rake also will be proposed which can be used to efficiently scan a large-scale wind tunnel test section, such as the new low-speed wind tunnel at the research park.

 

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