A proposed Atlas liner design fabricated for hydrodynamic experiments on Shiva Star

2002 ◽  
Author(s):  
W. Anderson ◽  
C. Adams ◽  
E. Armijo ◽  
J. Bartos ◽  
B. Cameron ◽  
...  
Keyword(s):  
Hydrodynamic Experiments

A simplified and open-source approach for multiple-valued water surface measurements in 2D hydrodynamic experiments

2020 ◽  
Vol 42 (12) ◽  
Author(s):  
Jassiel V. Hernández-Fontes ◽  
Irving D. Hernández ◽  
Rodolfo Silva ◽  
Edgar Mendoza ◽  
Paulo T. T. Esperança
Keyword(s):  
Open Source ◽  
Water Surface ◽  
Hydrodynamic Experiments ◽  
Surface Measurements

Hydrodynamic experiments in microgravity on board MIR space station

1995 ◽  
Vol 16 (7) ◽  
pp. 109-112
Author(s):  
E.L Kaliazin ◽  
A.A Kozlov ◽  
V.V Rogozhinsky ◽  
B.A Sokolov
Keyword(s):  
Space Station ◽  
Hydrodynamic Experiments

scholarly journals A General Fluctuation–Response Relation for Noise Variations and its Application to Driven Hydrodynamic Experiments

2017 ◽  
Vol 167 (1) ◽  
pp. 29-45 ◽  
Author(s):  
Cem Yolcu ◽  
Antoine Bérut ◽  
Gianmaria Falasco ◽  
Artyom Petrosyan ◽  
Sergio Ciliberto ◽  
...  
Keyword(s):  
Hydrodynamic Experiments

scholarly journals Hydrodynamic experiments on a small-scale circulating fluidized bed reactor at elevated operating pressure, and under an O2/CO2 environment

2017 ◽  
Vol 21 (2) ◽  
pp. 1093-1104 ◽  
Author(s):  
Yerbol Sarbassov ◽  
Azd Zayoud ◽  
Pinakeswar Mahanta ◽  
Sai Gu ◽  
Panneerselvam Ranganathan ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Fluidized Bed ◽  
Atmospheric Pressure ◽  
Circulating Fluidized Bed ◽  
Elevated Pressure ◽  
Small Scale ◽  
Operating Pressure ◽  
Hydrodynamic Parameters ◽  
Hydrodynamic Experiments ◽  
Promising Development

Pressurized circulating fluidized bed technology is a potentially promising development for clean coal technologies. The current work explores the hydrodynamics of a small-scale circulating fluidized bed at elevated operating pressures ranging from 0.10 to 0.25 MPa. The initial experiments were performed at atmospheric pressure with air and O2/CO2 environments as the fluidization gas to simulate the hydrodynamics in a circulating fluidized bed. A comparison between the effects of air and O2/CO2 mixtures on the hydrodynamics was outlined in this paper for particles of 160 ?m diameter. A small but distinct effect on axial void-age was observed due to the change in gas density in the dense zone of the bed at lower gas velocity, while only minimal differences were noticed at higher gas velocities. The hydrodynamic parameters such as pressure drop and axial voidage profile along the height were reported at two different bed inventories (0.5 and 0.75 kg) for three mean particle sizes of 160, 302, and 427 ?m and three superficial gas velocities. It was observed that the operating pressure had a significant effect on the hydrodynamic parameters of bed pressure drop and axial bed void-age profiles. The effect of solids loading resulted in an exponential change in pressure drop profile at atmospheric pressure as well as at elevated pressure. The experimental results on hydrodynamic parameters are in reasonable agreement with published observations in the literature.

Research on the influence of ground effect on the performance of robotic fish propelled by oscillating paired pectoral fins

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hongwei Ma ◽  
Shuai Ren ◽  
Junxiang Wang ◽  
Hui Ren ◽  
Yang Liu ◽  
...  
Keyword(s):  
Ground Effect ◽  
Robotic Fish ◽  
Two Dimensional ◽  
Pectoral Fin ◽  
Content Type ◽  
Pectoral Fins ◽  
Propulsion Performance ◽  
Effect Model ◽  
Hydrodynamic Experiments ◽  
Flexible Deformation

Purpose This paper aims to carry out the research on the influence of ground effect on the performance of robotic fish propelled by oscillating paired pectoral fins. Design/methodology/approach The two-dimensional ground effect model of the oscillating pectoral fin without considering flexible deformation is established by introducing a two-dimensional fluid ground effect model. The parameters of the influence of ground effect on the oscillating pectoral fin are analyzed. Finally, the ground effect test platform is built, and a series of hydrodynamic experiments are carried out to study the influence of ground effect on the propulsion performance of the robotic fish propelled by oscillating paired pectoral fins under different motion parameters. Findings The thickness of the trailing edge and effective clearance are two important parameters that can change the influence of ground effect on the rigid pectoral fin. The experimental results are consistent with that obtained through theoretical analysis within a certain extent, which indicates that the developed two-dimensional ground effect model in this paper can be used to analyze the influence of ground effect on the propulsion performance of the oscillating pectoral fin. The experiment results show that the average thrust increases with the decreasing distance between the robot fish and the bottom. Meanwhile, with the increase of oscillation frequency and amplitude, the average thrust increases gradually. Originality/value The developed two-dimensional ground effect model provides the theoretical basis for the further research on the influence of ground effect on the propulsion performance of the oscillating pectoral fin. It can also be used in the design of the bionic pectoral fins.

A Bio-inspired Soft Robotic Arm: Kinematic Modeling and Hydrodynamic Experiments

2018 ◽  
Vol 15 (2) ◽  
pp. 204-219 ◽  
Author(s):  
Zheyuan Gong ◽  
Jiahui Cheng ◽  
Xingyu Chen ◽  
Wenguang Sun ◽  
Xi Fang ◽  
...  
Keyword(s):  
Robotic Arm ◽  
Kinematic Modeling ◽  
Hydrodynamic Experiments ◽  
Soft Robotic Arm

scholarly journals Influence of turbulence and in-stream structures on the transport and survival of grass carp eggs and larvae at various developmental stages

2019 ◽  
Vol 82 (1) ◽  
Author(s):  
Andres F. Prada ◽  
Amy E. George ◽  
Benjamin H. Stahlschmidt ◽  
Patrick Ryan Jackson ◽  
Duane C. Chapman ◽  
...  
Keyword(s):  
Grass Carp ◽  
Early Life ◽  
Developmental Stages ◽  
Shear Stresses ◽  
Life Stages ◽  
Early Life Stages ◽  
Field Collection ◽  
Hydrodynamic Experiments ◽  
Active Swimming ◽  
Eggs And Larvae

AbstractUnderstanding the response of grass carp to flow and turbulence regimes during early life stages is fundamental to monitoring and controlling their spread. A comprehensive set of hydrodynamic experiments was conducted with live grass carp eggs and larvae, to better understand their drifting and swimming patterns with 3 different in-stream obstructions: (1) a gravel bump, (2) a single cylinder, and (3) submerged vegetation. The hydrodynamic behavior of eggs and larvae with each obstruction was continuously monitored for about 85 consecutive hours. Transient spatial distributions of the locations of eggs and larvae throughout the water column were generated for each flow scenario. Results show that the active swimming capabilities of larvae allow them to seek areas of low turbulence and low shear stresses, and that eggs are susceptible to damage by high levels of turbulence, which was further corroborated with tests in an oscillating grid-stirred turbulence tank. Our study seeks to better inform field collection of grass carp during early life stages, and to guide the design of alternative approaches to control the dispersal of this invasive species in North America.

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