WIND-TUNNEL CALIBRATIONS OF A COMBINED PHOT-STATIC TUBE, VANE-TYPE FLOW-DIRECTION TRANSMITTER, AND STAGNATION-TEMPERATURE ELEMENT AT MACH NUMBERS FROM 0.60 TO 2.87

摘要

Calibration tests of a combined Pitot - static tube, vane-type flow-direction transmitter, and stagnation-temperature element have been conducted over a range of Mach numbers from 0.60 to 2.87 in the Langley 8-foot transonic pressure tunnel and in the Langley Unitary Plan wind tunnel. The results indicate that the variations in static-pressure error due to angle of attack were generally less than 1 percent of the impact pressure for angles up to 15°, whereas the variations due to a sideslip angle of ±10° ranged from 2 to 4 percent, depending on the Mach number. The effects of angles of attack from -3° to 20° and/or angles of sideslip from -10° to 10° on the measurement of total pressure were less than one-half of 1 percent of the impact pressure. The angle-of-attack vane indicated too high an angle with an error at 15° ranging from 0.5° to 2.k°, depending on the Mach number. The sideslip-vane errors ranged from zero to 1.5° for sideslip angles to ±10°. There were no significant variations in the measured stagnation temperature due to angles of attack from about -3° to 20° and/or angles of sideslip from -10° to 10°.