DMD and POD of time-resolved schlieren on a multi-stream single expansion ramp nozzle

Matthew G. Berry; Mohd Y. Ali; Andrew S. Magstadt; Mark N. Glauser

doi:10.1016/j.ijheatfluidflow.2017.05.007

DMD and POD of time-resolved schlieren on a multi-stream single expansion ramp nozzle

Matthew G. Berry, Mohd Y. Ali, Andrew S. Magstadt, Mark N. Glauser

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Time-resolved schlieren measurements were conducted on a supersonic rectangular multi-stream nozzle used for three-stream engines. The jet utilizes a single expansion ramp nozzle (SERN) configuration along with an bypass stream, operating at an ideally expanded bulk flow of M_j,1=1.6 and bypass stream of M_j,3=1.0. Experiments were conducted with and without an aft deck to model airframe integration. Schlieren imaging was acquired up to 100 kHz in two different orientations. Proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) were applied to the schlieren data to identify flow structures. Comparisons were made between the two decomposition methods in the form of spatial correlations.

Original language	English (US)
Pages (from-to)	60-69
Number of pages	10
Journal	International Journal of Heat and Fluid Flow
Volume	66
DOIs	https://doi.org/10.1016/j.ijheatfluidflow.2017.05.007
State	Published - Aug 2017

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1016/j.ijheatfluidflow.2017.05.007

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title = "DMD and POD of time-resolved schlieren on a multi-stream single expansion ramp nozzle",

abstract = "Time-resolved schlieren measurements were conducted on a supersonic rectangular multi-stream nozzle used for three-stream engines. The jet utilizes a single expansion ramp nozzle (SERN) configuration along with an bypass stream, operating at an ideally expanded bulk flow of Mj,1=1.6 and bypass stream of Mj,3=1.0. Experiments were conducted with and without an aft deck to model airframe integration. Schlieren imaging was acquired up to 100 kHz in two different orientations. Proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) were applied to the schlieren data to identify flow structures. Comparisons were made between the two decomposition methods in the form of spatial correlations.",

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AU - Berry, Matthew G.

AU - Ali, Mohd Y.

AU - Magstadt, Andrew S.

AU - Glauser, Mark N.

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AB - Time-resolved schlieren measurements were conducted on a supersonic rectangular multi-stream nozzle used for three-stream engines. The jet utilizes a single expansion ramp nozzle (SERN) configuration along with an bypass stream, operating at an ideally expanded bulk flow of Mj,1=1.6 and bypass stream of Mj,3=1.0. Experiments were conducted with and without an aft deck to model airframe integration. Schlieren imaging was acquired up to 100 kHz in two different orientations. Proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) were applied to the schlieren data to identify flow structures. Comparisons were made between the two decomposition methods in the form of spatial correlations.

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ER -

DMD and POD of time-resolved schlieren on a multi-stream single expansion ramp nozzle

Abstract

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