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Adham Bekhit and Florin Popescu
In the present study, Computational Fluid Dynamics (CFD) is used to investigate the roll decay of the benchmark surface combatant DTMB-5512 ship model appended with bilge keels, sailing in calm water at different speeds (Fr = 0.0, 0.138, 0.2, 0.28 and 0....
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Mostafa Taherian and Abdolmajid Mohammadian
Significant environmental effects from the use of marine outfall discharges have led to increased efforts by both regulatory bodies and research groups to minimize the negative impacts of discharges on the receiving water bodies. Understanding the charac...
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Nicoletta Franchina, Otman Kouaissah, Giacomo Persico and Marco Savini
The paper presents the results of a computational study on the aerodynamics and the performance of a small-scale Vertical-Axis Wind Turbine (VAWT) for distributed micro-generation. The complexity of VAWT aerodynamics, which are inherently unsteady and th...
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Valery Zapryagaev, Nikolay Kiselev and Dmitry Gubanov
In the present paper, we give a brief overview of the studies of supersonic jet flows which were performed recently with the aim of gaining experimental data on the formation of the shock-wave structure and jet mixing layer in such flows. Considerable at...
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Valery Zapryagaev, Nikolay Kiselev and Dmitry Gubanov
In the present paper, we give a brief overview of the studies of supersonic jet flows which were performed recently with the aim of gaining experimental data on the formation of the shock-wave structure and jet mixing layer in such flows. Considerable at...
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Stefano Gaggero and Marco Ferrando
Tip loading is a common strategy to increase the propulsive efficiency of propellers. Solutions such as contracted and tip-loaded (CLT) and ?New generation? CLT propellers exploit the presence of an endplate (?true? or as the result of a dedicated modifi...
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Guangjie Peng, Yuan Lou, Dehui Yu, Shiming Hong, Guangchao Ji, Lie Ma and Hao Chang
Marine sediment pumps are extensively applied in marine engineering fields with complex media and harsh flow conditions. Therefore, this study conducts a multi-factor optimization design for a marine sediment pump. The response surface optimization metho...
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Han Li, Qiaogao Huang, Guang Pan, Xinguo Dong and Fuzheng Li
Reducing the noise of the underwater propulsor is gaining more and more attention in the marine industry. The pump-jet propulsor (PJP) is an extraordinary innovation in marine propulsion applications. This paper inspects the effects of blade number on a ...
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Prateek Kumar Singh, Xiaonan Tang and Hamidreza Rahimi
Numerous sources of overtopping and flood events suggest different cross-sectional land characteristics of the river and urban river water systems. Multiple stages of floodplains in compound channels are viable in urban areas to facilitate bank slope sta...
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Xavier Flete, Nicolas Binder, Yannick Bousquet and Sandrine Cros
In the current study, full-stage unsteady simulations were performed to investigate rotating instability inception mechanisms in a particularly large tip clearance centrifugal compressor with a vaneless diffuser and a volute. Four operating points along ...
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Ranieri Emanuele Nargi, Paolo Candeloro, Fabrizio De Gregorio, Giuseppe Ceglia and Tiziano Pagliaroli
An investigation of twin corotating rotors? interaction effects was performed by load (thrust and torque) measurements, flow field dynamics through Time-Resolved Particle Image Velocimetry, and acoustic emissions using a microphone array. Two rotors, eac...
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Josep M. Duró and Josep M. Bergadà
Airport traffic around the world has sharply increased over the years; as a result, airports need to be enlarged and the landing or taking off times between two consecutive airplanes must be reduced. To precisely determine the minimum time required betwe...
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Francesca Gnani, Kin Hing Lo, Hossein Zare-Behtash and Konstantinos Kontis
In the field of aerospace engineering, the study of the characteristics of vortical flows and their unsteady phenomena finds numerous engineering applications related to improvements in the design of tip devices, enhancement of combustor performance, and...
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Yingzhe Zhang, Baohong Bai, Dakai Lin and Peiqing Liu
The flap side-edge is a vital contributor to airframe noise. In this study, we propose a novel flap side-edge noise reduction method based on the concept of active blowing air. A long slot is opened from the flap?s lower surface to the tip surface to ind...
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Bohan Liu and Sunho Park
To ensure the long-term reliability of tidal stream turbines, waves and currents must be considered during the design phase. In this paper, a three-bladed horizontal axis turbine with a diameter of 0.9 m was used as the baseline model. OpenFOAM, an open-...
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Xiaofan Lou, Chenlin Sun, Hongyi Jiang, Hongjun Zhu, Hongwei An and Tongming Zhou
The effects of yaw angle on wake characteristics of a stationary square cylinder were investigated in terms of the hydrodynamic forces, the vortex shedding frequency, and the vortical structures using direct numerical simulations (DNS) at a Reynolds numb...
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Chun-Yao Yang and Yi-Chih Chow
Juncture flows associated with surface-mounted obstacles can be characterized by a U-shaped tubular vortical flow known as a horseshoe vortex (HSV). Horseshoe vortices are usually detrimental to engineering applications. In order to identify a boundary g...
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Manuel Henner, Bruno Demory, Mohamed Alaoui, Maxime Laurent and Benjamin Behey
Two blade curvatures representative of those found in automotive fans are compared. Measured performances are analyzed for forward and backward curved blades, either with or without heat-exchangers placed in front of them. The backward fan demonstrated g...
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Matthew C. Jones and Eric G. Paterson
To better understand the influence of swirl on the thermally-stratified near wake of a self-propelled axisymmetric vehicle, three propulsor schemes were considered: a single propeller, contra-rotating propellers (CRP), and a zero-swirl, uniform-velocity ...
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Naser Al Haddabi, Konstantinos Kontis and Hossein Zare-Behtash
Cavity flows occur in a wide range of low-speed applications (Mach number ≤0.3" role="presentation">=0.3=0.3
=
0.3
), such as aircraft wheel wells, ground transportation, and pipelines. In the current study, a steady jet is forced from a cavit...
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