THE AERODYNAMIC DESIGN AND CALIBRATION OF AN ASYMMETRICnVARIABLE MACH NUMBER NOZZLE WITH A SLIDING BLOCKnFOR THE MACH NUMBER RANGE 1.27 TO 2.75

摘要

A method of designing an asymmetric, fixed-geometry, variable Mach number nozzle has been developed by using the method of characteristics. A small nozzle conforming to the analytically determined ordinates was constructed and calibrated over a range of Mach numbers extending: from 1.27 to 2.75. The results show the variation in Mach number to be ±0.02 or less and in the flow direction to be ±0.2° within the test section. The range of Mach numbers from 1.27 to 2.75 was obtained by translating the lower block in a straight line parallel to the test-section center line for a distance of 2.17 test-section heights.