LAUSR

Range of insensitivity is a crucial characteristic for pitot-static probe, and it is defined as the range of aerodynamic angle where the measurement error does not exceed acceptable tolerance. This article proposes a static orifice design in order to extend the range of insensitivity for static pressure measurement. The assumption of pressure in the static pressure cavity of a multiorifice pitot-static probe is empirically proposed and verified by wind tunnel test. Based on this assumption, the circumferential distribution of orifices for ten-orifice pitot-static probe is optimized using the adaptive simulated annealing (ASA) algorithm. After optimization, within −15° to −25° angle of attack (AOA) and 0°–15° angle of sideslip (AOS), the weighted static pressure coefficient error decreases from 0.0331 to 0.0249. The range of insensitivity is reduced by 5° in AOA direction but extended by 5° in AOS direction, where the experiment shows a good acceptance with numerical results.