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Wolfgang Sanz and David Scheier
The flow in a transonic turbine stage still poses a high challenge for the correct prediction of turbulence using an eddy viscosity model. Therefore, an unsteady RANS simulation with the k-? SST model, based on a preceding study of turbulence inlet condi...
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Ettore Bertolini, Paul Pieringer and Wolfgang Sanz
The aim of this work is to study the influence of different subgrid-scale (SGS) closure models and inflow turbulence conditions on the boundary layer transition on the suction side of a highly loaded transonic turbine cascade in the presence of high free...
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Marius Schneider, Heinz-Peter Schiffer and Knut Lehmann
An algorithm is presented generating a complete set of inlet boundary conditions for Reynolds-averaged Navier?Stokes computational fluid dynamics (RANS CFD) of high-pressure turbines to investigate their interaction with lean and rich burn combustors. Th...
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Ali M. AbdelSalam, Ramalingam Velraj
Simulations of wind turbine wakes are presented in this paper using the three-dimensional Reynolds-Averaged Navier-Stokes (RANS) equations employing the k-e turbulence model appropriately modified for the atmospheric flows. The actuator disk approach is ...
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Matteo Dellacasagrande, Davide Lengani, Daniele Simoni and Marina Ubaldi
The bursting phenomenon consists in the switch of a laminar separation bubble from a short to a long configuration. In the former case, reduced effects on profile pressure distribution are typically observed with respect to the attached condition. On the...
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Chen Li, Hongming Wang and Peiting Sun
It is well known that sail-assisted propulsion works under gradient wind conditions in the atmospheric boundary layer, and is an energy-saving device for fuel consumption. In order to study the aerodynamic characteristics of a wingsail in the atmospheric...
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Miles T. Trumper, Parviz Behrouzi and James J. McGuirk
Detailed knowledge of jet plume development in the near-field (the first 10?15 nozzle exit diameters for a round jet) is important in aero-engine propulsion system design, e.g., for jet noise and plume infrared (IR) signature assessment. Nozzle exit Mach...
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Ali Abbasi, Frank Ohene Annor and Nick Van de Giesen
An unsteady fully three-dimensional model of Lake Binaba (a shallow small reservoir) in semi-arid Upper East Region of Ghana has been developed to simulate its temperature dynamics. The model developed is built on the Reynolds Averaged Navier?Stokes (RAN...
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Ali Abbasi, Frank Ohene Annor, Nick van de Giesen
Pág. 1 - 24
An unsteady fully three-dimensional model of Lake Binaba (a shallow small reservoir) in semi-arid Upper East Region of Ghana has been developed to simulate its temperature dynamics. The model developed is built on the Reynolds Averaged Navier?Stokes (RAN...
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Bo Hu, Chuan Wang, Hui Wang, Qian Yu, Jinhua Liu, Yong Zhu, Jie Ge, Xinxin Chen and Yang Yang
The horizontal submerged jet (HSJ), as a special form of jet, is widely used in aerospace, food and drug, water engineering, and other industries. In order to further understand the mechanism of the HSJ, the Wray?Agarwal turbulence model was used to pred...
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Cheng Liu, Jianping Huang, Evgeni Fedorovich, Xiao-Ming Hu, Yongwei Wang and Xuhui Lee
Turbulence statistics and spectra in a radiatively heated convective boundary layer (CBL) under aerosol pollution conditions are less investigated than their counterparts in the clear CBL. In this study, a large-eddy simulation (LES) coupled with an aero...
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Witold Klimczyk and Adam Sieradzki
Modeling of Unmanned Aerial Vehicles (UAV) propellers in a global, multidisciplinary aeroacoustic optimization was investigated. The modeling consists of three aspects: geometry, aerodynamics, and aeroacoustics. Firstly, a parametric geometry model was e...
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Eugene N. A. Hoffman, Elijah J. LaLonde, Angelina Andrade, Ivana Chen, Hayden A. Bilbo and Christopher S. Combs
The characterization of a hypersonic impulse facility is performed using a variety of methods including Pitot probe scans, particle image velocimetry, and schlieren imaging to verify properties such as the velocity, Mach number, wall boundary layer thick...
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Lin Yu, Yifan Li, Zhongzhi Yao, Long You, Zong-Pei Jiang, Wei Fan and Yiwen Pan
Turbulence is one of the ubiquitous aspects of aquatic systems and affects many physical and biological processes. Based on direct velocity measurements and a computational fluid dynamics (CFD) simulation, we characterized the distribution of the turbule...
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Stefano Serafin, Bianca Adler, Joan Cuxart, Stephan F. J. De Wekker, Alexander Gohm, Branko Grisogono, Norbert Kalthoff, Daniel J. Kirshbaum, Mathias W. Rotach, Jürg Schmidli, Ivana Stiperski, ?eljko Vecenaj and Dino Zardi
The exchange of heat, momentum, and mass in the atmosphere over mountainous terrain is controlled by synoptic-scale dynamics, thermally driven mesoscale circulations, and turbulence. This article reviews the key challenges relevant to the understanding o...
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Bidur Khanal, Alistair Saddington and Kevin Knowles
This paper presents the development of a fourth-order finite difference computational aeroacoustics solver. The solver works with a structured multi-block grid domain strategy, and it has been parallelized efficiently by using an interface treatment base...
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Bidur Khanal, Alistair Saddington and Kevin Knowles
This paper presents the development of a fourth-order finite difference computational aeroacoustics solver. The solver works with a structured multi-block grid domain strategy, and it has been parallelized efficiently by using an interface treatment base...
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Balázs Both, Zoltán Szánthó
Pág. 129 - 136
In this paper an offset, attached jet is investigated both experimentally and numerically, applying the tangential room air distribution system. The attachment distance of the injected air jet, which influences the ventilation characteristics in the room...
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B. S. Purwanto
Pág. pp. 58 - 68
Density current is a type of current that occurs when fluid flow enters a fluid body of different density. The density difference introduces stratification state that requires treatment in the parameterization of turbulence. Due to the geometric shape of...
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A. BIROL KARA,JAMES B. ELSNER
This paper examines aspects of the atmospheric boundary layer (ABL) for several U. S. coastal and inland locations around the Gulf of Mexico. Simulations are performed using the Oregon State University (OSU) planetary boundary layer model under a Gulf...
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