The effect of jet exit pressure ratio on a jet in cross flow

Thomas Knast, Lee Mears, Nishal Arora, Tufan Kumar Guha, Rajan Kumar, Farrukh S. Alvi, Damon R. Honnery, Daniel M. Edgington-Mitchell

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

An experimental investigation of the effect of jet exit pressure ratio on a jet in supersonic cross flow has been undertaken. The flow characteristics of four jets of differing exit pressure ratio are investigated for constant momentum ratio and cross flow condition. Surface flow visualisation is used to investigate the footprint and blockage caused by the injectant jet, while schlieren and shadowgraph photography are implemented to explore the shock structure and jet penetration properties. Preliminary results show a monotonic decrease in the size and strength of the jet shock structure as the pressure ratio is reduced, with a closely pressure match state being achieved at the lowest exit pressure ratio tested. The reduction of the jet shock structure is accompanied by a reduction in the size of the bow shock and its stand-off distance from the jet. Despite the significant differences in mean shock structure the penetration achieved by each jet tested appears to be similar.

Original languageEnglish
Title of host publication2018 Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics
ISBN (Print)9781624105531
DOIs
Publication statusPublished - 2018
EventAIAA Fluid Dynamics Conference 2018 - Atlanta, United States of America
Duration: 25 Jun 201829 Jun 2018
Conference number: 48th

Conference

ConferenceAIAA Fluid Dynamics Conference 2018
Abbreviated titleAIAA 2018
CountryUnited States of America
CityAtlanta
Period25/06/1829/06/18

Cite this

Knast, T., Mears, L., Arora, N., Guha, T. K., Kumar, R., Alvi, F. S., Honnery, D. R., & Edgington-Mitchell, D. M. (2018). The effect of jet exit pressure ratio on a jet in cross flow. In 2018 Fluid Dynamics Conference [AIAA 2018-3546] American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2018-3546