A stereoscopic particle image velocimetry (SPIV) system was used to measure airflow characteristics in an irregularly shaped test room. These measurements were compared with air velocity measurements obtained by a sonic anemometer instrument, hot-wire instrument, and draft instrument. The dimensions of the main portion of the test room were 2.1 × 2.1 × 1.7 m (7 × 7 × 5.6 ft). The ceiling of the center portion of the test room was elevated and had dimensions of 2.1 × 1.0 × 0.4 m (7.0 × 3.1 × 1.4 ft). All of the measurements were taken at five measurement locations along the center plane of the test room. For each measurement location, numerous pairs of SPIV, sonic, hot-wire, and draft data were collected and averaged to determine the average velocity. The normalized turbulence intensity was calculated from the SPIV data. The equipment description, measurement procedures, and velocity data are presented in this paper. A comparison was made for the average velocities from each of the four types of measurement equipment. This comparison established the benefit of using a non-contact measurement system such as the SPIV system.

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