variavel0=<b>Maria Luísa Collucci da Costa Reis</b> - mluisareis@yahoo.com.br Centro Técnico Aeroespacial
<b>Olympio Achilles de Faria Mello</b> - oamello@directnet.com.br Centro Técnico Aeroespacial
<b>Matsuo Chisaki</b> - mchisaki@ig.com.br Centro Técnico Aeroespacial
<b>Abstract.</b> The static pressure p at the subsonic Wind Tunnel of the Aerodynamic Testing Laboratory of the Institute of Aeronautics and Space - IAE, Aerospace Technical Center - CTA, is measured using an absolute pressure sensor, located at the upper test section wall. This measurement is not taken at the same location as the one where the model is mounted during the actual wind tunnel test. This fact raises the need for a correction during data reduction. The identification and evaluation of the associated error source is important because the static pressure is an input quantity for the computation of the total pressure pt, Mach number M and density p during the test. The present paper is concerned with the determination of the relationship between the static pressure at the tunnel’s upper wall and the static pressure at the model location, and with the analysis of the uncertainty propagation for the measured flow parameters.
<b>Keywords.</b> flow quality, uncertainty in measurement, wind tunnel tests.