The 5-hole pitot probe is the mainstream choice for 2D flow field measurements (e.g., airfoil surfaces, curved pipelines), with a structural design balancing accuracy and practicality.Gas Pressure Scanwelcome to click on the website to learn more!
Core Advantages:
- Holes are arranged in a "cross + center" pattern (1 central hole for total pressure, 4 symmetric holes in upper, lower, left, and right positions, with an included angle of 30°-60°), capable of resolving airflow deflection angles in a plane (error <2° within ±40°);
- Response speed is 10%-15% faster than 7-hole probes (in dynamic flow field tests, 5-hole probes once captured instantaneous airflow fluctuations in an engine inlet);
- Cost is only 60%-70% of 7-hole probes, suitable for batch deployment (e.g., multi-point arrays in automotive wind tunnels).
Limitations:
- Cannot measure airflow deflection angles in the vertical plane (i.e., "roll" components in 3D flow fields);
- When turbulence intensity >8%, static pressure collection by symmetric holes is susceptible to interference, requiring filtering algorithms for correction (in a wind tunnel experiment, uncorrected data deviated by 8%).
Application Recommendations:
Prioritize use in "planar 2D flow fields" such as aircraft wing surfaces and centrifugal fan outlets; avoid forced use in complex 3D flow fields (e.g., combustion chamber interiors).