The Influence of Pressure Ratio and Divergence Angle on the Shock Position in Two Dimensional, Over-Expanded, Convergent-Divergent Nozzles

摘要

Tests have been made to determine the influence of divergence angle and applied pressure ratio on the shock position in over-expanded, Laval-type, convergent-divergent nozzles. The tests covered a range of design pressure ratios between 3.5 and 17.0 and included divergence angles of from 5° to 40°.nAn empirical expression has been derived which enables the limiting pressure ratio at which the nozzle just nana full to be calculated and curves are presented from which the shock position within the nozzle can be obtained.