Results 91 to 100 of about 71,336 (264)
Numerical Simulations of Unsteady Fluid Forces in Heat Exchanger Tube Bundles
, 2011 Heat transfer is the main concern in designing shell and tube heat exchangers. Flowinduced vibration (FIV) is also a major concern while designing shell and tube heat exchangers. Fluidelastic instability (FEI), turbulence, periodic instability, and acoustic resonance are the FIV mechanisms that could cause to vibrations in heat exchanger tube bundles ...
Omar, H., Hassan, M., Gerber, A.
openaire +3 more sources
An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system
Deep Underground Science and Engineering, EarlyView.The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand +5 more
wiley +1 more source
Acoustic Analysis of Square Array of Cylinders in Duct Using Unsteady Fluid Force.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1997 In this paper we describe the acoustic analysis of fluid flow in a duct with four cylinders. The sound field is considered to be related to the oscillating lift forces which act on the cylinders, which are experimentally measured. The Helmholtz acoustic equation associated with oscillating fluid force is applied to the flow past four circular cylinders.
Zhongsen YAN +3 more
openaire +2 more sources
Dynamic behavior of a beam drag-force anemometer [PDF]
A cantilevered beam with strain gages attached to the fixed ends and the minimax technique were used in an experiment conducted to determine the dynamic behavior of a drag-force anemometer in high frequency, unsteady flow.
Fralick, G. C.
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Energy Science &Engineering, EarlyView.To investigate the influence of discharge valve opening on the self‐priming characteristics of a self‐priming pump, numerical calculations are conducted for four different discharge valve openings based on a circulation piping system. The hydraulic performance and the internal flow characteristics during self‐priming process are obtained.
Yu‐Liang Zhang +3 more
wiley +1 more source
Energy Science &Engineering, EarlyView.Three designs were built and tested: a single‐slope still, a six‐stepped still, and a six‐stepped still with 5 mm sponge sheets. The novelty lies in fixing porous sponge sheets to the vertical faces of the steps. Yield of freshwater and instantaneous efficiency were determined in various combinations, that is, base, stepped, and stepped‐cum‐sponge ...
A. Venkata Satyanarayana +4 more
wiley +1 more source
Journal of Biomechanical Science and Engineering, 2018 Insect wings change its shape passively by the aerodynamic and inertial forces when flapping, which can greatly affect its aerodynamic performances. In order to confirm the importance of the fluid-structure interaction in flapping wing aerodynamics, we ...
Toshiyuki NAKATA, Ryusuke NODA, Hao LIU
doaj +1 more source
Unsteady Newton-Busemann flow theory. Part 2: Bodies of revolution [PDF]
Newtonian flow theory for unsteady flow past oscillating bodies of revolution at very high Mach numbers is completed by adding a centrifugal force correction to the impact pressures.
Hui, W. H., Tobak, M.
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Energy Science &Engineering, EarlyView.This figure illustrates the optimal near‐wall treatment schemes (first‐layer height and wall function type) for solid–liquid two‐phase CFD of suspended sediment, which are correlated with particle size and flow velocity. ABSTRACT Near‐wall treatment (boundary‐layer meshing and wall functions) is a major uncertainty in solid–liquid two‐phase CFD of ...
Zichao Zhang +4 more
wiley +1 more source
Energy Science &Engineering, EarlyView.This paper aims to provide a robust design approach for HAWTs operating in shear flow. This study fills a critical research gap by integrating BEM and vortex theories for blade design in non‐homogeneous inflow conditions. The authors of the paper made an effort to develop and test an experimentally unsophisticated model of a turbine working in shear ...
Agnieszka Dorota Woźniak +2 more
wiley +1 more source