Measurement of Air Velocity in Mines

Accu accurate air velocity measurement aircourse airflow airstream anemome ANEMOMETER Centerline area measurement average velocity BuMines calibration curve Center point cf 1 racy computed Continuous traverse control station control stopping correction factors cross-sectional area determined equation error experiment experimental guidelines Handheld in-mine instrument isovels laminar flows locity maximum velocity measurement devices measurement method MEASUREMENT OF AIR measurement plane measurement station ment methyl salicylate NAP NAP NAP obstruction oil of wintergreen operator influence photograph pitot tube pitot-tube array planimetering Point of maximum Range cf Range pct pct readings taken rection factors Reynolds number roadway diameters sampling accuracy selection Simpson's rule single-point centerline smoke tube Stickheld straight airway Summary of correction surement THERMOANEMOMETER Thimons Timber sets Timed-point traverse traverse speed true velocity true volume flow tube and oil turbulent flows uous traverse upstream vane anemometer velocity ranges ventilation volume flow rate vortex shedding anemometer width from rib