Development of low dimensional models for control of compressible flows

Ukeiley, Lawrence; Kannepalli, Chandrasekhar; Arunajatesan, Srinivasan

doi:10.1109/cdc.2002.1184379

Cited by 4 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Testing of the HiFAST flow control device at very small (1/72 nd ) laboratory scale was initially done in the NCPA 2" tunnel, with additional test performed at DERA in England and in the Lockheed CFWT facility. Tests were supported by detailed CFD studies, and the overall work was performed jointly by the NCPA and CRAFT-Tech [74][75][76].…”

Section: Control Of Cavity Aeroacoustics In Aircraft Weapons Baysmentioning

confidence: 99%

A Brief Overview of Contributions Made by Jack Seiner Based on Collaborative Activities Spanning the past Thirty Years

Dash

2012

International Journal of Aeroacoustics

View full text Add to dashboard Cite

This commemorative article will provide a brief and informal overview of some of Dr. John M. Seiner's (Jack's) key contributions, based largely on collaborative efforts performed over the past thirty years. Such efforts were initially focused on problems related to the understanding and reduction of jet noise, but later encompassed a number of other aero-acoustic and propulsive problem areas. At the NASA Langley Research Center (LaRC), Jack was instrumental in developing the Jet Noise Laboratory (JNL) and its anechoic test facility. He was head of the JNL for a number of years prior to his retirement from NASA. During his LaRC years (1974-1998): Jack developed test facilities as well as innovative testing and diagnostic techniques for studying high speed jets; he provided unique insights into the understanding of high speed jet noise mechanisms and the methodology to be used to predict noise emission; and, he provided the jet noise community with a significant number of archival data sets. He also made major contributions to ongoing NASA jet noise reduction programs such as the High Speed Research (HSR) program, and he was also involved in activities related to jet/laser interactions and installation effects, as well as to varied problems involving turbulent mixing control and mixing enhancement. After leaving NASA in 1998, Jack became associate director, and then director of the National Center for Physical Acoustics (NCPA) at the University of Mississippi in Oxford. He was tasked with expanding the NCPA's activities to encompass aeroacoustic and related problems of interest to the Department of Defense (DOD). At the NCPA, Jack and coworkers (a number of whom had been part of his JNL team at NASA-Bernie Jansen, Mike Ponton, and Larry Ukeily) designed a state-of-the art 12" trisonic tunnel for aero-acoustic testing up to Mach 5, and they developed an anechoic test chamber comparable to the one operational at the LaRC. Jack's research activities at the NCPA had a DOD emphasis and involved work in areas such as weapons bay cavity aeroacoustics, missile aero-propulsion, and aero-optics/turbulence control, as well as more traditional jet noise reduction research activities, which now became focused on Military Fighter Aircraft. A brief overview of contributions made by Jack Seiner based on collaborative activities spanning the past thirty years

show abstract

Section: Control Of Cavity Aeroacoustics In Aircraft Weapons Baysmentioning

confidence: 99%

A Brief Overview of Contributions Made by Jack Seiner Based on Collaborative Activities Spanning the past Thirty Years

Dash

2012

International Journal of Aeroacoustics

View full text Add to dashboard Cite

show abstract

“…In comparison, the vector-valued POD modes were in cohort with the compressible flow dynamics. Ukeiley et al (2002) employed qðr; tÞ ¼ ½ q q 1 ; u U 1 ; v U 1 ; w U 1 ; T ÀT 1 T 0 ÀT 1 to perform POD on numerical data of compressible mixing layer. The variables, as shown above, were normalized by their freestream values to ensure a rational weighing of their fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Reduced-order description of fluid flow with moving boundaries by proper orthogonal decomposition

Utturkar

Zhang

Shyy

2005

International Journal of Heat and Fluid Flow

View full text Add to dashboard Cite

“…Examples of reduced order model (ROM) approaches proposed within the past decade, each with its own inherent strengths, are the reduced basis method [15,24,25], balanced truncation [27,28], balanced proper orthogonal decomposition (POD) [29], moment-matching [30], and goal-oriented ROMs [16]. The attractiveness of ROMs in predictive settings has prompted improvements in model-reduction methodologies for applications such as flow controller design [17,21,42], shape optimization [22], and aeroelastic stability analysis [18,23]. It has also motivated the development of approaches for adapting pre-computed ROMs to changes in physical and/or modeling parameters [17,21,18,23,19,20].…”

Section: Introductionmentioning

confidence: 99%

A Stable Galerkin Reduced Order Model (Rom) for Compressible Flow

Kalashnikova¹,

Arunajatesan²

2014

Proceedings of 10th World Congress on Computational Mechanics

Self Cite

View full text Add to dashboard Cite

Abstract. A method for constructing stable Proper Orthogonal Decomposition (POD)/Galerkin reduced order models (ROMs) for compressible flow is described. The proposed model reduction technique differs from the approach taken in many applications in that the Galerkin projection step is applied to the continuous system of partial differential equations (PDEs), rather than a semi-discrete representation of these equations. It is demonstrated that the inner product used to define the Galerkin projection is intimately tied to the stability of the resulting model. For linearized conservation laws such as the linearized compressible Euler and linearized compressible Navier-Stokes equations, a symmetry transformation leads to a stable formulation for the inner product. Preservation of stability for the discrete implementation of the Galerkin projection is

show abstract

Development of low dimensional models for control of compressible flows

Cited by 4 publications

References 15 publications

A Brief Overview of Contributions Made by Jack Seiner Based on Collaborative Activities Spanning the past Thirty Years

A Brief Overview of Contributions Made by Jack Seiner Based on Collaborative Activities Spanning the past Thirty Years

Reduced-order description of fluid flow with moving boundaries by proper orthogonal decomposition

A Stable Galerkin Reduced Order Model (Rom) for Compressible Flow

Contact Info

Product

Resources

About