Cavitating flow-induced unsteady pressure pulsations in a low specific speed centrifugal pump. [PDF]
R Soc Open Sci, 2018 With the development of cavitation, the high-energy pressure wave from a cavitation bubble collapsing is detrimental to the stable operation of centrifugal pumps.
Zhang N, Gao B, Li Z, Jiang Q.
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Flow in a Low Specific Speed Centrifugal Pump Using PIV [PDF]
Advances in Mechanical Engineering, 2013 The interflow plays important roles in centrifugal pump design. In order to study the effect of rotation and z -axis on internal flow, two-dimensional particle image velocimetry (PIV) measurements have been performed to measure the steady velocity field ...
Cui Dai, Liang Dong
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Specific characteristics of speed skating
Medicine & Science in Sports & Exercise, 1987 Fourteen well-trained speed skaters performed all-out exercise tests during ice speed skating, low walking (walking-like movement in skating position), and dry skating (side to side deep sitting push-offs). These dry land training activities, widely used by speed skaters during the summer period, are compared to speed skating in relation to the concept
de Boer Rw +6 more
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Performance of Very Low Specific Speed Centrifugal Pumps with Circular Casing
Journal of Fluid Science and Technology, 2007 Efficiency of a centrifugal pump is known to drop rapidly with a decrease of specific speed ns in the range of ns ≤ 100 [m,m3/min,min-1]. However, below ns = 60, the pump efficiency is not yet clear, and the spiral angle of a volute casing becomes too
Shusaku KAGAWA +3 more
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Validity of a Squash-Specific Test of Change-of-Direction Speed [PDF]
International Journal of Sports Physiology and Performance, 2009 Purpose:We examined the validity and reproducibility of a squash-specifc test designed to assess change-of-direction speed.Methods:10 male squash and 10 male association-football and rugby-union players completed the Illinois agility run (IAR) and a squash change-of-direction-speed test (SCODS) on separate days. Tests were repeated after 24 h to assess
Michael Wilkinson +2 more
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Investigation on Flow-Induced Noise due to Backflow in Low Specific Speed Centrifugal Pumps [PDF]
Advances in Mechanical Engineering, 2013 Flow-induced noise causes disturbances during the operation of centrifugal pumps and also affects their performance. The pumps often work at off-design conditions, mainly at part-load conditions, because of frequent changes in the pump device system ...
Qiaorui Si +3 more
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Measuring the Dynamic Characteristics of a Low Specific Speed Pump—Turbine Model [PDF]
Energies, 2016 This paper presents results from an experiment performed to obtain the dynamic characteristics of a reversible pump-turbine model. The characteristics were measured in an open loop system where the turbine initially was run on low rotational speed before
Eve Cathrin Walseth +2 more
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REPETITION SPEED IN THE CONTEXT OF SPECIFIC PHYSICAL TRAINING PERIOD FOR JUDO ATHLETES
Studia Universitatis Babeş-Bolyai: Educatio Artis Gymnasticae, 2017 Introduction: Muscles are the main driving force in the locomotive system. Moreover, their activity is crucial for athletic performance. The repetition speed they generate allows for higher performance.
Péter-Zsolt SZABÓ +5 more
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Cell type, sub-region, and layer-specific speed representation in the hippocampal-entorhinal circuit. [PDF]
Sci Rep, 2020 Iwase M, Kitanishi T, Mizuseki K.
europepmc +3 more sources
A New Prediction Method for the Complete Characteristic Curves of Centrifugal Pumps
Energies, 2021 Complete pump characteristics (CPCs) are the key for establishing pump boundary conditions and simulating hydraulic transients. However, they are not normally available from manufacturers, making pump station design difficult to carry out.
Huokun Li +6 more
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