Improvements of the Primary Measuring System in the

T-38 Wind Tunnel

 

Aleksandar Vitić

Đorđe Vuković

Mirko Milosavljević

Dijana Damljanović

 

The Mach number is the main similarity parameter in high-speed flows and its measurement is of fundamental importance in wind tunnel testing. Еrrors in measuring the Mach number are propagated as significant errors in the determination of aerodynamic coefficients. In a recent effort to improve the quality of measurements in the supersonic speed range of the trisonic T-38 wind tunnel of the Military Technical Institute (VTI) in Belgrade, an upgrade of the system of transducers and probes used to measure the test section flow parameters has been made, accompanied by an upgrade in the pressure-transducer-calibration system

Key words: wind tunnel, wind tunnel testing, measuring system, pressure measurement, pressure transducer, pressure probe, calibration.