Showing papers by "Concordia University published in 1973"
TL;DR: In this paper, an analytical finite-difference method is used to predict the linearity and sensitivity of a co-flowing air velocity sensor, which consists of a 0.023-in. inside diameter nozzle and receiver assembly.
Abstract: An analytical finite-difference method is used to predict the linearity and sensitivity of a co-flowing air velocity sensor. The sensor, conceived, developed and tested at the National Research Council consists of a 0.023-in. inside diameter nozzle and receiver assembly which, when placed in a free-stream of unknown velocity, can be used to measure that free-stream velocity. For a certain range of jet and stream velocities the measured pressure from the receiver is linearly related to the free-stream velocity. With known jet supply pressures the analysis predicts jet exit velocities and the dynamic recovery pressure in the receiver for different values of free-stream velocities. The predictions compare well with variable density wind tunnel experimental results covering free-stream air velocities, temperatures and pressures of 50-720 ft/sec, −40°C to +20°C and 400-750 mm. Hg abs., respectively, and sensor jet nozzle exit velocities of 50-500 ft/sec.
2 citations