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Martin Ottersten, Hua-Dong Yao and Lars Davidson
In this study, three voluteless centrifugal fans are compared for their aeroacoustic performances. The tonal noise is predicted by coupling the IDDES with Formulation 1A of Farassat. The sources of the tonal noise at the blade passing frequency (BPF" rol...
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Martin Ottersten, Hua-Dong Yao and Lars Davidson
In this study, unsteady low-frequency characteristics in a voluteless low-speed centrifugal fan operating at a high mass flow rate are studied with improved delayed detached eddy simulation (IDDES). This study is motivated by a recent finding that the no...
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Naveed Anjum, Usman Ghani, Ghufran Ahmed Pasha, Abid Latif, Tahir Sultan and Shahid Ali
In the present study, the flow structure of discontinuous double-layered vegetation patches was investigated using a 3D Reynolds stress turbulence model (RSM). The channel domain was built using GAMBIT (Geometry and Mesh Building Intelligent Toolkit). Fo...
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Bruno Santos Goulart, Cleverson Bringhenti, Jesuíno Takachi Tomita, Antonio Carlos Oliveira
Pág. 629 - 634
An efficient combustion depends on many factors, such as injection, turbulence and ignition characteristics. With the improvement of internal combustion engines the turbulence intensity and internal pressure have risen, demanding more efficient and power...
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Lakshmi Narayana Phaneendra Peri, Antonella Ingenito and Paolo Teofilatto
The goal of this paper is to investigate the aerodynamic and aerothermodynamic behavior of the Schiaparelli capsule after the deployment of a supersonic disk-gap-band (DGB) parachute during its re-entry phase into the Martian atmosphere. The novelty of t...
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Weidong Cao and Wei Li
The operating range of axial flow pumps is often constrained by the onset of rotating stall. An improved method using a double inlet nozzle to stabilize the performance curve is presented in the current study; a single inlet nozzle and three kinds of dou...
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Matteo Dellacasagrande, Edward Canepa, Andrea Cattanei and Mehrdad Moradi
The present work reports an experimental study of the leakage flow in a low-speed fan ring. Existing 2D Particle Image Velocimetry (PIV) measurements taken in a meridional plane in front of the rotor gap have been further processed and analyzed by means ...
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Ke Hu, Xinglan Bai and Murilo A. Vaz
To investigate the different influencing characteristics of local scour around submarine pipelines, hydrodynamic and sediment transport two-dimensional models based on Flow-3D are used to numerically simulate the local scour around the pipeline under ste...
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Xinyue Yang, Xianglai Zeng, Carlo Gualtieri, Alan Cuthbertson, Ruo-Qian Wang and Dongdong Shao
With the rapid development of commercial aquaculture in recent decades, large numbers of submerged cages or pens are clustered in fish farms that are commonly located within inland lakes, reservoirs, and coastal embayments around the world. The submerged...
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Abiodun Babatunde Onamusi
Pág. 47 - 54
Research question: This study assessed the combined moderating effect of organizational structure and environmental turbulence on entry mode strategy - performance link focusing on baby care industry in Lagos State, Nigeria. Motivation: The manufacturers...
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Hua Zhu, Dechao Li, Henglin Pu, Limin Wang, Yang He, Yufan Bu and Defu Che
An inherent defect of the operating rotary air preheaters (RAPH) is known as leakage, which seriously hinders the efficient and safe operation of RAPH. It is significant for the estimation of the direct leakage to determine the effects of different struc...
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Dmytro Redchyts,Alexandre Gourjii,Svitlana Moiseienko,Tetiana Bilousova
Pág. 36 - 41
Numerical modeling of multi-element airfoil's aerodynamics employs the Reynolds averaged Navier-Stokes equations of incompressible environment, which are related via a single-parametric differential turbulence model by Spalart-Allmaras. The system of ini...
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Wei Wang, Zhaoyong Mao, Wenlong Tian and Tingying Zhang
The vortex-induced vibration (VIV) suppression of a circular cylinder with the axial-slats is numerically investigated using the computational fluid dynamics (CFD) method for Reynolds number range of 8.0 × 103?5.6 × 104. The two-dimensional unsteady Reyn...
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Yilin Yang, Meilan Qi, Jinzhao Li and Xiaodong Ma
This study concerns the evolution of flow field and hydrodynamic characteristics within the developing scour hole around a four-pile group with 2 × 2 arrangement. The instantaneous velocities in scour holes at four typical stages during the scouring proc...
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Yen-Cheng Chiang, Yu-Cheng Hsu and Shiu-Wu Chau
This paper aims to demonstrate a simplified nonlinear wake model that fills the technical gap between the low-cost and less-accurate linear formulation and the high-cost and high-accuracy large eddy simulation, to offer a suitable balance between the pre...
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