Application of POD on time-resolved schlieren in supersonic multi-stream rectangular jets

M. G. Berry, A. S. Magstadt, Mark N Glauser

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

In this paper, we present an experimental investigation of a supersonic rectangular nozzle with aft deck used for three-stream engines. The jet utilizes a single expansion ramp nozzle (SERN) configuration along with multiple streams, operating at a bulk flow Mj,1 = 1.6 and bypass stream Mj,3 = 1.0. This idealized representation consists of two canonical flows: a supersonic convergent-divergent (CD) jet and a sonic wall jet. Time-resolved schlieren experiments were performed up to 100 kHz. Proper orthogonal decomposition (POD), as suggested by Lumley for structure identification in turbulent flows, is applied to the schlieren images and the spatial eigenfunctions and time-dependent coefficients are related to the flow structures. This research seeks to lay a foundation for fundamental testing of multi-stream SERNs and the identification of the flow physics that dominate these modern military nozzles.

Original languageEnglish (US)
Article number020706
JournalPhysics of Fluids
Volume29
Issue number2
DOIs
StatePublished - Feb 1 2017
Externally publishedYes

    Fingerprint

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this