METHOD FOR MEASURING THE CONTROL CROSS SECTION AREA OF A NOZZLE

摘要

PCT No. PCT/DE89/00733 Sec. 371 Date Jul. 11, 1991 Sec. 102(e) Date Jul. 11, 1991 PCT Filed Nov. 23, 1989 PCT Pub. No. WO90/08299 PCT Pub. Date Jul. 26, 1990.The method for measuring the cross-sectional area of a nozzle by a pneumatic through-flow method with supercritical pressure ratio measures the volume flow flowing through the nozzle on its input side by a differential pressure measurement at a resistance distance through which a laminar flow passes. Deviations of the temperature of the test medium from a reference value are determined by a temperature sensor and accounted for via a correction factor.