Готові списки джерел за темами / Unsteady mode

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Добірка наукової літератури з теми "Unsteady mode"

Автор: Grafiati
Опубліковано: 2 грудня 2022
Оновлено: 25 липня 2025

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Статті в журналах з теми "Unsteady mode"

1

Wynn, A., D. S. Pearson, B. Ganapathisubramani, and P. J. Goulart. "Optimal mode decomposition for unsteady flows." Journal of Fluid Mechanics 733 (September 24, 2013): 473–503. http://dx.doi.org/10.1017/jfm.2013.426.

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AbstractA new method, herein referred to as optimal mode decomposition (OMD), of finding a linear model to describe the evolution of a fluid flow is presented. The method estimates the linear dynamics of a high-dimensional system which is first projected onto a subspace of a user-defined fixed rank. An iterative procedure is used to find the optimal combination of linear model and subspace that minimizes the system residual error. The OMD method is shown to be a generalization of dynamic mode decomposition (DMD), in which the subspace is not optimized but rather fixed to be the proper orthogon
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2

Ibraheem AlQadi, Ibraheem AlQadi. "Investigation of Flow Around a Slender Body at High Angles of Attack." journal of King Abdulaziz University Engineering Sciences 30, no. 1 (2019): 51–61. http://dx.doi.org/10.4197/eng.30-1.4.

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Анотація:
A numerical investigation of flow around a slender body at high angles of attack is presented. Large eddy simulation of the flow around an ogive-cylinder body at high angles of attack is carried out. Asymmetric vortex flow was observed at angles of attack of α = 55◦ and 65◦ . The results showed that the phenomenon is present in the absence of artificial geometrical or flow perturbation. Contrary to the accepted notion that flow asymmetry is due to a convective instability, the development of vortex asymmetry in the absence of perturbations indicates the existence of absolute instability. An in
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3

Li, Yi-bin, Chang-hong He, and Jian-zhong Li. "Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition." Mathematical Problems in Engineering 2019 (April 16, 2019): 1–15. http://dx.doi.org/10.1155/2019/2567659.

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Анотація:
To investigate the unsteady flow characteristics and their influence mechanism in the volute of centrifugal pump, the Reynolds time-averaged N-S equation, RNG k-ε turbulence model, and structured grid technique are used to numerically analyze the transient flow-field characteristics inside the centrifugal pump volute. Based on the quantified parameters of flow field in the volute of centrifugal pump, the velocity mode contours and oscillation characteristics of the mid-span section of the volute of centrifugal pump are obtained by dynamic mode decomposition (DMD) for the nominal and low flow-r
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4

Ling, Meiting, Ting Zhao, Wenguo Luo, Jianfeng Zhu, and Yancheng You. "Analysis of Aerodynamic Characteristics of Rotating Detonation Turbine Based on Proper Orthogonal Decomposition Method." Aerospace 12, no. 5 (2025): 406. https://doi.org/10.3390/aerospace12050406.

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Анотація:
The unsteady interactions in rotating detonation turbine engines (RDTE) remain poorly understood. To address this, a 2D numerical model integrating a rotating detonation combustor (RDC) with a first-stage turbine is established to analyze flow structures and aerodynamics under various detonation modes. Proper orthogonal decomposition (POD) reveals intrinsic links between flow features and performance metrics. Results show that while the RDC generates total pressure gain, it induces significant unsteady flow. Guide vanes partially suppress pressure fluctuations but cannot eliminate total pressu
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5

Corrochano, Adrián, Donnatella Xavier, Philipp Schlatter, Ricardo Vinuesa, and Soledad Le Clainche. "Flow Structures on a Planar Food and Drug Administration (FDA) Nozzle at Low and Intermediate Reynolds Number." Fluids 6, no. 1 (2020): 4. http://dx.doi.org/10.3390/fluids6010004.

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Анотація:
In this paper, we present a general description of the flow structures inside a two-dimensional Food and Drug Administration (FDA) nozzle. To this aim, we have performed numerical simulations using the numerical code Nek5000. The topology patters of the solution obtained, identify four different flow regimes when the flow is steady, where the symmetry of the flow breaks down. An additional case has been studied at higher Reynolds number, when the flow is unsteady, finding a vortex street distributed along the expansion pipe of the geometry. Linear stability analysis identifies the evolution of
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6

Hall, K. C., and P. D. Silkowski. "The Influence of Neighboring Blade Rows on the Unsteady Aerodynamic Response of Cascades." Journal of Turbomachinery 119, no. 1 (1997): 85–93. http://dx.doi.org/10.1115/1.2841014.

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Анотація:
In this paper, we present an analysis of the unsteady aerodynamic response of cascades due to incident gusts (the forced response problem) or blade vibration (the flutter problem) when the cascade is part of a multistage fan, compressor, or turbine. Most current unsteady aerodynamic models assume the cascade to be isolated in an infinitely long duct. This assumption, however, neglects the potentially important influence of neighboring blade rows. We present an elegant and computationally efficient method to model these neighboring blade row effects. In the present method, we model the unsteady
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7

STEWART, B. E., M. C. THOMPSON, T. LEWEKE, and K. HOURIGAN. "Numerical and experimental studies of the rolling sphere wake." Journal of Fluid Mechanics 643 (January 15, 2010): 137–62. http://dx.doi.org/10.1017/s0022112009992072.

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Анотація:
A numerical and experimental investigation is reported for the flow around a rolling sphere when moving adjacent to a plane wall. The dimensionless rotation rate of the sphere is varied from forward to reversed rolling and the resulting wake modes are found to be strongly dependent on the value of this parameter. Results are reported for the Reynolds number range 100 < Re < 350, which has been shown to capture the unsteady transitions in the wake. Over this range of Reynolds number, both steady and unsteady wake modes are observed. As the sphere undergoes forward rolling, the wake displa
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8

Chiang, H. W. D., and S. Fleeter. "Passive Control of Flow-Induced Vibrations by Splitter Blades." Journal of Turbomachinery 116, no. 3 (1994): 489–500. http://dx.doi.org/10.1115/1.2929438.

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Анотація:
Splitter blades as a passive control technique for flow-induced vibrations are investigated by developing an unsteady aerodynamic model to predict the effect of incorporating splitter blades into the design of an axial flow blade row operating in an incompressible flow field. The splitter blades, positioned circumferentially in the flow passage between two principal blades, introduce aerodynamic and/or combined aerodynamic-structural detuning into the rotor. The unsteady aerodynamic gust response and resulting oscillating cascade unsteady aerodynamics, including steady loading effects, are det
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9

Vabishchevich, Petr N. "Fundamental mode exact schemes for unsteady problems." Numerical Methods for Partial Differential Equations 34, no. 6 (2018): 2301–15. http://dx.doi.org/10.1002/num.22292.

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10

Aurahs, L., C. Kasper, M. Kürner, M. G. Rose, S. Staudacher, and J. Gier. "Water flow model turbine flow visualization study of the unsteady interaction of secondary flow vortices with the downstream rotor." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 223, no. 6 (2009): 677–86. http://dx.doi.org/10.1243/09576509jpe841.

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Анотація:
This article presents detailed flow visualization photographs, root mean square processed photography, and computational fluid dynamics (CFD) results of the interaction of the vane passage vortex and horseshoe vortex with the rotor of an axial flow turbine model. Different modes of vortex breakdown behaviour have been experimentally observed inside the rotating passage of the turbine blade. These are spiral vortex mode and bubble mode breakdown. The breakdown mode changes as the vortices are influenced by the periodic pressure field of the rotor. The measurements were taken in a vertical water
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Дисертації з теми "Unsteady mode"

1

McCombes, Tom Ruaridh. "An unsteady hydrodynamic model for tidal current turbines." Thesis, University of Strathclyde, 2014. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25495.

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Анотація:
Due to concerns about the impacts of carbon emissions on the environment, the security of supply of electricity and the likelihood of achieving "peak-oil" in the near future, governments have legislated to reduce reliance on fossil fuels. An attractive alternative is power obtained from tidal currents, and the coast of the British Isles is especially hydraulically active. Tidal energy converters typically resemble wind turbines however, unlike wind turbines, they are expected to operate in an environment which is singularly hostile, and will also be expected to generate power in non-ideal oper
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2

Strganac, Thomas W. "A numerical model of unsteady, subsonic aeroelastic behavior." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/74775.

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Анотація:
A method for predicting unsteady, subsonic aeroelastic responses has been developed. The technique accounts for aerodynamic nonlinearities associated with angles of attack, vortex-dominated flow, static deformations, and unsteady behavior. The angle of attack is limited only by the occurrence of stall or vortex bursting near the wing. The fluid and the wing together are treated as a single dynamical system, and the equations of motion for the structure and flowfield are integrated simultaneously and interactively in the time domain. The method employs an iterative scheme based on a predictor-c
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3

Janowski, Michael David. "Analysis of a simplified nonlinear ground resonance model." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/16084.

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4

Kitsios, Vassili. "Recovery of fluid mechanical modes in unsteady separated flows." Poitiers, 2010. http://www.theses.fr/2010POIT2292.

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Анотація:
This study is concerned with the recovery of fluid mechanical modes that can be used to describe the physical properties of unsteady separated flows. The flow configuration of interest is a spanwise homogeneous NACA 0015 airfoil with leading edge laminar separation and turbulent recirculation. An in-depth understanding of the unsteady flow dynamics and fluid mechanical stability properties, can assist in the future development of more efficient separation control strategies. In order to provide a richer understanding of the physics, the flow fields are numerically generated, and characterised
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5

Boyd, David Douglas Jr. "Rotor/Fuselage Unsteady Interactional Aerodynamics: A New Computational Model." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/28591.

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Анотація:
A new unsteady rotor/fuselage interactional aerodynamics model has been developed. This model loosely couples a Generalized Dynamic Wake Theory (GDWT) to a Navier-Stokes solution procedure. This coupling is achieved using a newly developed unsteady pressure jump boundary condition in the Navier-Stokes model. The new unsteady pressure jump boundary condition models each rotor blade as a moving pressure jump which travels around the rotor azimuth =and is applied between two adjacent planes in a cylindrical, non-rotating grid. Comparisons are made between predictions using this new model and ex
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6

Chua, Weng Heng. "Flow visualization studies over a UCAV 1303 model." Thesis, Monterey, Calif. : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Jun/09Jun%5FChua.pdf.

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Анотація:
Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, June 2009.<br>Thesis Advisor(s): Chandrasekhara, M. S. "June 2009." Description based on title screen as viewed on July 10, 2009. Author(s) subject terms: Unsteady Aerodynamics, UCAV Maneuvers, 2D-unsteady flows. Includes bibliographical references (p. 43-44). Also available in print.
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7

Ghimire, Ganesh Raj. "Developing Sediment Transport and Deposition Prediction Model of Lower Ohio River near the Olmsted Locks and Dam Area." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/theses/1967.

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Анотація:
The present study focuses on the sediment deposition and consequent dredging issues in Lower Ohio River at the Olmsted Locks and Dam area-River mile (RM)-964.4 during the ongoing in-the-wet construction methodology. The study reach is between Locks and Dam 53 (RM 962.6) at upstream, and RM 970 at downstream. One dimensional (1-D) HEC-RAS numerical modeling in conjunction with Arc-GIS was employed. Stream flow measurements, velocity, incoming sediment concentration, bed gradation, and annual hydrographic survey data acquired from public archives of USGS and USACE Louisville District were used a
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8

Ghommem, Mehdi. "Modeling and Analysis for Optimization of Unsteady Aeroelastic Systems." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/29604.

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Анотація:
Simulating the complex physics and dynamics associated with unsteady aeroelastic systems is often attempted with high-fidelity numerical models. While these high-fidelity approaches are powerful in terms of capturing the main physical features, they may not discern the role of underlying phenomena that are interrelated in a complex manner. This often makes it difficult to characterize the relevant causal mechanisms of the observed features. Besides, the extensive computational resources and time associated with the use these tools could limit the capability of assessing different configuratio
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9

Romano, Federico. "Q1D unsteady ballistic model for solid rocket motors performance prediction." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Анотація:
The simulation tool ROBOOST, in use at the Alma Propulsion Lab of the University of Bologna – Forlì Campus, exploits a hybrid ballistic model 0D-1D. The need of a complete Q1D model for the entire combustion time, from motor start-up to burn out arised. The present work is devoted to the development and test of a Q1D unsteady ballistic model for solid rocket motors performance prediction. The newly developed code, called SOL1D, is written in Matlab environment and is capable of predicting the time and space evolution of all the main thermodynamic variables during the solid rocket motor combust
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10

Hosder, Serhat. "Unsteady Skin-Friction Measurements on a Maneuvering Darpa2 Suboff Model." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/33582.

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Анотація:
Steady and unsteady flow over a generic Suboff submarine model is studied. The skin-friction magnitudes are measured by using hot-film sensors each connected to a constant temperature anemometer. The local minima in the skin-friction magnitudes are used to obtain the separation locations. Steady static pressure measurements on the model surface are performed at 10° and 20° angles of attack. Steady and unsteady results are presented for two model configurations: barebody and sail-on-side case. The dynamic plunge-pitch-roll model mount (DyPPiR) is used to simulate the pitchup maneuvers. The p
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Книги з теми "Unsteady mode"

1

Vest, Michael S. Unsteady aerodynamic model of flapping wings. AIAA, 1995.

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2

United States. National Aeronautics and Space Administration., ed. A numerical model of unsteady, subsonic aeroelastic behavior. National Aeronautics and Space Administration, 1987.

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3

P, Woodward Richard, and United States. National Aeronautics and Space Administration., eds. Unsteady blade pressure measurements on a model counterrotation propeller. National Aeronautics and Space Administration, 1989.

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4

Webb, J. C. On the nonlinear stability of viscous modes within the Rayleigh problem of an infinite flat plate. Institute for Computer Applications in Science and Engineering, 1994.

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5

United States. National Aeronautics and Space Administration., ed. Low re multiple-time-scale turbulence model and calculations of steady and pulsating shear layers. National Aeronautics and Space Administration, 1992.

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6

United States. National Aeronautics and Space Administration., ed. Low re multiple-time-scale turbulence model and calculations of steady and pulsating shear layers. National Aeronautics and Space Administration, 1992.

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7

Winfield, James Frederick. A three-dimensional unsteady aerodynamic model with applications to flapping-wing propulsion. University of Toronto, Department of Aerospace Science and Engineering, 1990.

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8

G, Jones Michael, Thurlow Ernie M, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., eds. Unsteady pressure loads in a generic high-speed engine model. National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1992.

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9

G, Jones Michael, Thurlow Ernie M, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., eds. Unsteady pressure loads in a generic high-speed engine model. National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1992.

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10

E, Paxson Daniel, and Lewis Research Center, eds. A simplified model for the investigation of acoustically driven combustion instabilities. National Aeronautics and Space Administration, Lewis Research Center, 1998.

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Частини книг з теми "Unsteady mode"

1

Kaji, Shojiro. "Transonic Cascade Flutter in Combined Bending-Chordwise Translational Mode." In Unsteady Aerodynamics and Aeroelasticity of Turbomachines. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5040-8_51.

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2

Isomura, Kousuke. "The Effect of Blade Vibration Mode on a Flutter in a Transonic Fan." In Unsteady Aerodynamics and Aeroelasticity of Turbomachines. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5040-8_47.

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3

Bell, D. L., and L. He. "Three Dimensional Unsteady Flow Around a Turbine Blade Oscillating in Bending Mode — An Experimental and Computational Study." In Unsteady Aerodynamics and Aeroelasticity of Turbomachines. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5040-8_4.

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4

Baaijens, Frank P. T. "Numerical Analysis of Unsteady Viscoelastic Contraction Flows of Multi-Mode Fluids." In Topics in Applied Mechanics. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2090-6_19.

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5

Guan, Mingfang, Ming Zhang, Changhai Han, Leng Qing, and Yu Hang. "Research on the Non-constant Navigable Water Flow Conditions of the River Channel Downstream of the Navigable Facilities of Baise Water Control Project." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_135.

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AbstractThe exit of Baise ship lift on the Right River is only about 700 m away from Dongsun Hydropower Station. Its dispatching operation, especially the unsteady flow, has a direct impact on the navigable water flow conditions of the approach channel gate area and river channel downstream of the Baise ship lift. According to some characteristics of Baise Junction and Dongsun Junction and the measured topography of Baoai River, a plane two-dimensional numerical model of the research river section is constructed, and the water flow changes in the mouth area under different working conditions a
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6

Statnikov, V., T. Sayadi, M. Meinke, P. Schmid, and W. Schröder. "Investigations of Unsteady Transonic and Supersonic Wake Flow of Generic Space Launcher Configurations Using Zonal RANS/LES and Dynamic Mode Decomposition." In High Performance Computing in Science and Engineering ‘14. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10810-0_26.

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7

Nishioka, T., and K. Kondo. "A Unified Derivation of Explicit Expressions for Transient Asymptotic Solutions of Dynamically Propagating Cracks under the Mode I, II and III Unsteady State Conditions." In Contemporary Research in Engineering Science. Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-80001-6_23.

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8

Branlard, Emmanuel. "Model of a Wind Turbine with Unsteady Circulation or Unsteady Inflow." In Research Topics in Wind Energy. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55164-7_26.

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9

Freymuth, P. "An Unsteady Model of Animal Hovering." In Lecture Notes in Engineering. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-84010-4_18.

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10

Nehring, U. "Model Equations Simulating Unsteady Viscous Flows." In Laminar-Turbulent Transition. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82462-3_88.

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Тези доповідей конференцій з теми "Unsteady mode"

1

Peng, Li, Zhao Qi-Jun, and Zhu Qiu-xian. "CFD Calculations on the Unsteady Aerodynamic Force of Tilt-rotor in Conversion Mode." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9422.

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Анотація:
In order to calculate the unsteady aerodynamic force of tilt-rotor in conversion mode, VBM (Virtual Blade Model), RBM (Real Blade Model) and HBM (Hybrid Blade Model) are established respectively. A new multi-layer moving-embedded grid technique is presented to reduce the numerical dissipation of the tilt-rotor wake. In this method, grid generated abound the rotor accounts for rigid blade motions and a new searching scheme is implemented to search suitable donor elements in moving-embedded grids to translate information between the viscous flow and inviscid flow zones. In these CFD methods, a d
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2

Buccio, Angela, Joseph Schmaus, Loren Ahaus, Matthew Hill, and Hong Xin. "Lichten Winner: Modeling Unsteady Aerodynamics in RCAS for High-Speed Rotor Aeroelastic Applications." In Vertical Flight Society 81st Annual Forum and Technology Display. The Vertical Flight Society, 2025. https://doi.org/10.4050/f-0081-2025-209.

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Aeroelastic stability prediction is critical to the successful design, development and flight testing of rotorcraft. As configurations reach higher speeds, new challenges in high Mach number unsteady aerodynamic modeling need to be addressed, especially for higher frequency aeroelastic modes with significant coupling. In this paper, Linear Unsteady aerodynamics and Leishman-Beddoes attached flow models are applied and compared to 2D CFD (airfoil) and 3D CFD/CSD (rotor) analysis for operating conditions of interest. The Leishman-Beddoes model demonstrates improved agreement with CFD data. In th
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3

Peng, Li, Zhao Qi-Jun, and Zhu Qiu-Xian. "New Trimming Strategy for Predicting of the Unsteady Aerodynamic Characteristics of Tilt-rotor/Wing in Conversion Mode." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10511.

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Based on the flight state planning, a new predetermined trimming methodology has been established to investigate the tilt-rotor/wing operational characteristics under conversion flight condition. Firstly, in order to enhance aerodynamic forces computing precision of tilt-rotor, and overcome the dependency on the test data, the two CFD models including Virtual Blade Model (VBM) and Real Blade Model (RBM) are established to simulate the unsteady flowfield of tilt-rotor in conversion mode. In the two CFD models, RANS equations are employed as government equations, and the implicit LU-SGS method i
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4

Kamliya Jawahar, Hasan, Kabilan Baskaran, and Mahdi Azarpeyvand. "Unsteady Characteristics of Mode Oscillation for\\ Screeching Jets." In AIAA AVIATION 2021 FORUM. American Institute of Aeronautics and Astronautics, 2021. http://dx.doi.org/10.2514/6.2021-2279.

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Silkowski, Peter D., and Kenneth C. Hall. "A Coupled Mode Analysis of Unsteady Multistage Flows in Turbomachinery." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-186.

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A computational method is presented for predicting the unsteady aerodynamic response of a vibrating blade row which is part of a multistage turbomachine. Most current unsteady aerodynamic theories model a single blade row isolated in an infinitely long duct. This assumption neglects the potentially important influence of neighboring blade rows. The present ‘coupled mode’ analysis is an elegant and computationally efficient method for modelling neighboring blade row effects. Using this approach, the coupling between blade rows is modelled using a subset of the so-called spinning modes, i.e. pre
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6

Huang, Qiuxiang, Jiaqing Kou, Fang-Bao Tian, John Young, Joseph Lai, and Sridhar Ravi. "Dynamic Mode Decomposition for Unsteady Flow over Flapping Wings." In AIAA SCITECH 2023 Forum. American Institute of Aeronautics and Astronautics, 2023. http://dx.doi.org/10.2514/6.2023-1618.

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7

Gabel, Matthew, Peter C. Lee, and Nesrin Sarigul-Klijn. "Cavity Wall Undulations to Manage Unsteady Airflow." In ASME 2024 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2024. https://doi.org/10.1115/imece2024-145235.

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Abstract We investigate the use of cavity wall features to delay cavity transition from the shear mode to the wake mode and obtain more favorable cavity conditions across the flight envelope. Undulations referred to as “juts” are added to the cavity wall to catch internal cavity vortices and delay their growth and shedding into the freestream. We use Large Eddy Simulation (LES) to model the flow over the cavity for compressible flow conditions. The frequencies of the undulations are adjusted with an optional trailing edge lip to investigate an optimum configuration. The juts are compared based
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8

Schmidt, David, and Frank Chavez. "Significance of unsteady aerodynamics and structural mode shape on predicting model variation." In AIAA Guidance, Navigation, and Control Conference and Exhibit. American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-4336.

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Luetke, Nathan, Taj Mohieldin, and Surrendra Tiwari. "Unsteady Numerical Analysis of Hydrogen Combustion in a Dual Mode Engine." In 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-5425.

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Dinesh, Ranga, Karl Jenkins, and Michael Kirkpatrick. "Simulations of Unsteady Oscillations in Turbulent Non-Premixed Swirling Flames." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59387.

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Simulations of turbulent non-premixed swirling flames based on the Sydney swirl burner experiments under different flame characteristics are conducted using large eddy simulations (LES). The simulations attempt to capture the unsteady flame oscillations and explore the underlying instability modes responsible for a centre jet precession and the large scale recirculation zone oscillation. The selected flame series known as SMH flames have a fuel mixture of methane-hydrogen (50:50 by volume). The LES program solved the governing equations on a structured Cartesian grid using finite volume method
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Звіти організацій з теми "Unsteady mode"

1

Tseng, Ming T., and D. M. Gee. Unsteady Flow Model for Forecasting Missouri and Mississippi Rivers. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada393969.

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2

Hosder, Serhat, and Roger L. Simpson. Unsteady Skin-Friction Measurements on a Maneuvering DARPA2 Suboff Model. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada390663.

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3

Kokes, Joseph, Mark Costello, and Jubaraj Sahu. Generating an Aerodynamic Model for Projectile Flight Simulation Using Unsteady, Time Accurate Computational Fluid Dynamic Results. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada457421.

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4

Carver, C., N. A. Chipman, and T. E. Carleson. Modelling the unsteady growth state population balance for a nonlinear growth model in an MSMPR crystallizer. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/164923.

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5

Dahl, Travis, Ronald Heath, Stanford Gibson, and Christopher Nygaard. HEC-RAS unsteady flow and sediment model of the Mississippi River : Tarbert Landing to the Gulf. Engineer Research and Development Center (U.S.), 2019. http://dx.doi.org/10.21079/11681/31782.

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6

Wissink, Andrew, Jude Dylan, Buvana Jayaraman, et al. New capabilities in CREATE™-AV Helios Version 11. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40883.

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CREATE™-AV Helios is a high-fidelity coupled CFD/CSD infrastructure developed by the U.S. Dept. of Defense for aeromechanics predictions of rotorcraft. This paper discusses new capabilities added to Helios version 11.0. A new fast-running reduced order aerodynamics option called ROAM has been added to enable faster-turnaround analysis. ROAM is Cartesian-based, employing an actuator line model for the rotor and an immersed boundary model for the fuselage. No near-body grid generation is required and simulations are significantly faster through a combination of larger timesteps and reduced cost
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7

Rahai, Hamid, and Jeremy Bonifacio. Numerical Investigations of Virus Transport Aboard a Commuter Bus. Mineta Transportation Institute, 2021. http://dx.doi.org/10.31979/mti.2021.2048.

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The authors performed unsteady numerical simulations of virus/particle transport released from a hypothetical passenger aboard a commuter bus. The bus model was sized according to a typical city bus used to transport passengers within the city of Long Beach in California. The simulations were performed for the bus in transit and when the bus was at a bus stop opening the middle doors for 30 seconds for passenger boarding and drop off. The infected passenger was sitting in an aisle seat in the middle of the bus, releasing 1267 particles (viruses)/min. The bus ventilation system released air fro
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8

Computer program HYDRAUX: a model for simulating one- dimensional, unsteady, open-channel flow. US Geological Survey, 1989. http://dx.doi.org/10.3133/wri884226.

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9

Verification of a one-dimensional, unsteady-flow model for the Fox River in Illinois. US Geological Survey, 1996. http://dx.doi.org/10.3133/wsp2477.

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10

The computer program FourPt (Version 95.01), a model for simulating one-dimensional, unsteady, open-channel flow. US Geological Survey, 1997. http://dx.doi.org/10.3133/wri974016.

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