Impact of expansion level on flowfield with sudden expansion at supersonic regimes

This paper aims to assess the control mechanism's efficiency and flow pattern in pipe. The was investigated for Mach numbers M = 1.25, 1.3, 1.48, 1.6, 1.8, 2.0, 2.5, 3.0 a step height of 3 mm. NPRs tests were from 11 3. revealed minimum duct requirement given number NPR as L 2D. Only some selected cases where mechanism impacts considerably are presented. In most cases, field same. There is reversal field; only such discussed. At low numbers, regulator raises pressure, rest findings reduce pressure except at 9 3.0, reversed trend.