Influence of Values of Angle of Jet-joining on Non-uniformity of Water Inflow Along the Path in Pressure Collector-Pipeline

2017 ◽  
Author(s):  
Volodymyr Cherniuk ◽  
Vasyl Ivaniv
Keyword(s):  
Experimental Investigation ◽  
Initial Segment ◽  
Terminal Segment ◽  
Water Inflow ◽  
Pressure Pipeline ◽  
Inner Diameter ◽  
Selection Of

Results of experimental investigation of the influence of values of the angle  at which jets join a pressure pipeline on the non-uniformity of water inflow along the collector-pipeline (CP) are presented. The inner diameter D of the CP is 11.28 mm, and the diameter d of the nozzles is 4.83 mm, d / D  0.428. Five CPs in which all the nozzles had been installed at angles  , the latter was given the values of:  0 ;  45 ;  90 ;  135 ;  180 , where investiguated. A CP in which in the initial segment the nozzles had been installed at the angle    0 , and in the middle and terminal segment    180 has been also investigated. The greatest non-uniformity of the water inflow along the CP was obtained for CPs with    90 , and the least one for CPs with diffrent values of the angle  . The obtained results give us the reason to conclude that it is possible to adjust the non-uniformity of water inflow into a CP by means of the method of selection of different values of angle  at which the jets join the CP.

scholarly journals First person – Yuki Ogawa

2021 ◽  
Vol 134 (6) ◽  
pp. jcs258526
Keyword(s):  
Initial Segment ◽  
Genome Engineering ◽  
Early Career ◽  
Cytoskeletal Proteins ◽  
Axon Initial Segment ◽  
First Person ◽  
Baylor College ◽  
Early Career Researchers ◽  
Selection Of

ABSTRACTFirst Person is a series of interviews with the first authors of a selection of papers published in Journal of Cell Science, helping early-career researchers promote themselves alongside their papers. Yuki Ogawa is first author on ‘Endogenously expressed Ranbp2 is not at the axon initial segment’, published in JCS. Yuki is a postdoc in the lab of Matthew Rasband at the Baylor College of Medicine, Houston, USA, investigating how the cytoskeletal proteins are organized in neurons by using CRISPR/Cas9-based genome engineering.

scholarly journals Condensation of Novec 649 refrigerant in pipe minichannels

2018 ◽  
Vol 70 ◽  
pp. 02002 ◽  
Author(s):  
Tadeusz Bohdal ◽  
Henryk Charun ◽  
Małgorzata Sikora
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Heat Transfer Coefficient ◽  
Pressure Drop ◽  
Mass Flux ◽  
Flow Structures ◽  
Test Results ◽  
Calculation Results ◽  
Vapour Quality ◽  
Inner Diameter

The paper presents the results of experimental investigation of Novec 649 refrigerant condensation in tube minichannels. This is a low-pressure refrigerant. This investigations are basis for flow structures visualization during condensation in pipe minichannels. The local and the average values of pressure drop (Δp/L) and heat transfer coefficient α in the whole range of the changes of vapour quality (x = 1 ÷ 0) were calculated. On the basis of the obtained test results there was illustrated the influence of the vapour quality x, the mass flux density G and the inner diameter of channel d changes on the studied parameters. These results were compared with the calculation results based on the dependencies of other authors.

The Structure of the Male Genital System of the Port Jackson Shark, Heterodontus portujacksoni, with Particular reference to the Genital Ducts

1982 ◽  
Vol 30 (4) ◽  
pp. 523 ◽  
Author(s):  
N Jones ◽  
RC Jones
Keyword(s):  
Sertoli Cell ◽  
Initial Segment ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
Terminal Segment ◽  
Rete Testis ◽  
Ductuli Efferentes ◽  
Pseudostratified Epithelium ◽  
Port Jackson ◽  
Germinal Cells

The testes of H. portusjacksoni are paired cylindrical organs with a germinal ridge running longitudinally along the ventral surface. The latter produces ampullae which contain Sertoli and germinal cells, and which migrate dorsally as spermatogenesis proceeds. They evacuate near the dorsal surface of the testis to release spermatozoa, large oval eosinophilic bodies (Sertoli cell bodies) and small eosinophilic particles. All of the genital ducts are lined by a ciliated epithelium. In the rete testis it is a low columnar type; the ducts consist of the conducting tubules, which convey ampullae across the testis, and the longitudinal testis canal, which runs along the dorsal surface of the testis. Six ductuli efferentes (lined by a low pseudostratified columnar epithelium) leave the testis, course dorsally through the epigonal organ and mesorchium, and enter the epididymis. Subsequently, pairs of ductuli efferentes successively join together to form a short common ductulus efferent which then continues as the ductus epididymidis. The latter has two structurally distinct regions: the initial segment is a narrow, convoluted, pigmented duct with a very tall pseudostratified epithelium; the terminal segment is wider than the initial segment, unpigmented and lined by a low pseudostratified epithelium. It is very convoluted proximally, but widens and becomes less convoluted distally; its distal 5 cm (ampulla of ductus epididymidis) is straight and contains a muscular wall. Very few Sertoli cell bodies are present in the terminal segment of the ductus epididymidis. However, except for the ampullary region the duct receives secretions (including irregularly shaped eosinophilic bodies) from Leydig's gland (a series of branched tubular glands). Secretions from these glands seem to be involved in the formation of spermatozoa into spherical bundles. The structure of the clasper and siphon are assessed in terms of their function and significance for taxonomical purposes.

An Experimental Investigation of the Factors That Contribute to the Creep-Relaxation of Compressed Non-Asbestos Gaskets

2007 ◽  
Author(s):  
Jose´ C. C. Veiga ◽  
Carlos F. A. Cipolatti ◽  
Ana M. F. de Sousa ◽  
David W. Reeves
Keyword(s):  
Experimental Investigation ◽  
Maximum Stress ◽  
Service Condition ◽  
Real Field ◽  
Term Creep ◽  
Relaxation Characteristics ◽  
Initial Assembly ◽  
Selection Of ◽  
Safe Working ◽  
Short Term Creep

The adequate tightness of flanged joints contributes to maintaining safe working conditions in numerous equipment and industrial installations. The new sealing technologies and materials can require more careful selection, handling and installation than previous asbestos equivalents. Many research studies have been conducted to understand and improve the assembly bolt load of piping joints in order to minimize the likelihood of leakage. The selection of the bolt load must consider many factors, such as: minimum gasket stress to achieve a seal; the maximum stress that will damage the joint components and the amount of gasket stress lost to creep-relaxation under room temperature and service condition. It is well known that the bolt load decrease to some degree after the initial assembly due to creep-relaxation characteristics of the gasket. ASME PCC-1 recommends restoring the gasket load, after a minimum 4 hours, due to short-term creep-relation. This paper intends to investigate factors which may influence the creep-relaxation characteristic of the compressed non-asbestos gasket. In order to reproduce real field condition, ASME B16.5 class 300lbs flanges were used in this experimental investigation.

Influence of pressure of sealed medium, inner diameter, and materials on selection of initial gasket width

2013 ◽  
Vol 49 (3-4) ◽  
pp. 251-255
Author(s):  
V. D. Prodan ◽  
A. V. Vasil’ev ◽  
A. S. Dubinina
Keyword(s):  
Inner Diameter ◽  
Selection Of

3—AN EXPERIMENTAL INVESTIGATION OF THE PREDICTED SELECTION OF FIBRES BY THE NOBLE COMB

1967 ◽  
Vol 58 (1) ◽  
pp. 25-39 ◽  
Author(s):  
D. S. Taylor ◽  
G. W. Walls ◽  
R. E. Bacon-Hall
Keyword(s):  
Experimental Investigation ◽  
Selection Of

Controlling the Dynamic Characteristics of a Hydrostatic Bearing by Using a Pocket-Connected Accumulator

1983 ◽  
Vol 197 (4) ◽  
pp. 255-258 ◽  
Author(s):  
M J Goodwin ◽  
C J Hooke ◽  
J E T Penny
Keyword(s):  
Experimental Investigation ◽  
Dynamic Characteristics ◽  
System Performance ◽  
Journal Bearings ◽  
Careful Selection ◽  
Hydrostatic Bearing ◽  
Optimum System ◽  
Flexible Rotors ◽  
Rotor Support ◽  
Selection Of

This paper describes a theoretical and experimental investigation of the dynamic characteristics of a capillary-compensated oil-lubricated hydrostatic bearing which has an accumulator connected to the bearing pocket via a second capillary restrictor. Results show that by careful selection of accumulator and restrictor the bearing can be tuned to give an optimum system performance. Such a facility can be of considerable use if the hydrostatic bearing is being used to support other machinery, for example in the support of journal bearings used with flexible rotors. By tuning the hydrostatic bearing dynamic characteristics, optimum rotor support impedance might be achieved thereby giving the engineer some control over system resonances and stability.

General Psychopharmacology

2018 ◽  
Author(s):  
Shadi Doroudgar ◽  
Paul Perry
Keyword(s):  
Butyric Acid ◽  
Synaptic Cleft ◽  
Terminal Segment ◽  
Clinical Effects ◽  
Postsynaptic Neuron ◽  
Presynaptic Neuron ◽  
Initial Development ◽  
Amino Butyric Acid ◽  
Enzyme Degradation ◽  
Selection Of

Initial development of neuropsychiatric medications relied heavily on serendipitous discovery rather than targeted drug designs. Nowadays, drug discovery targets include receptors, enzymes, and transporters. The human brain comprises many neurons, each being connected to other neurons via synapses. Neurotransmission occurs when a presynaptic neuron projects its terminal segment to form a connection or synapse with an adjacent postsynaptic neuron. When stimulated, neurotransmitters that are stored in small vesicles in the presynaptic neuron are released into an interneuronal gap called the synaptic cleft. Serotonin, dopamine, norepinephrine, γ-amino butyric acid, glutamate, and acetylcholine are among the primary neurotransmitters and chemicals that play important roles in neuropsychiatric functions. As such, they are often common targets of drug development. Grasping the basics of neurotransmission, enzyme degradation, and receptor and transporter pharmacology is essential in understanding today’s FDA-approved pharmaceuticals. This neuropharmacology primer will allow the rational and appropriate clinical selection of pharmacotherapy and accurate anticipation of clinical effects following use.   This review contains 1 figure and 45 references Key Words: acetylcholine, dopamine, γ-amino butyric acid, glutamate, neurotransmission, norepinephrine, pharmacology, psychiatric medications, psychopharmacology, receptor, serotonin

Optimization of Bubble Eliminator Through Numerical and Experimental Investigation

2012 ◽  
Vol 6 (4) ◽  
pp. 418-425 ◽  
Author(s):  
Sayako Sakama ◽  
◽  
Yutaka Tanaka ◽  
Ryushi Suzuki ◽  
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Flow Visualization ◽  
Swirl Flow ◽  
Optimal Shape ◽  
Air Bubbles ◽  
Hydraulic Systems ◽  
Inlet Tube ◽  
Technical Issues ◽  
Selection Of

Air bubbles in working oil affect the stiffness and efficiency of hydraulic systems; thus it is important for technical issues that air bubbles be actively eliminated from the hydraulic oil. A bubble eliminator is a device that uses a swirl flow to remove air bubbles. The shape of the device affects bubble elimination performance, so the selection of shape is the most important parameter in increasing the performance of the device. The purpose of this study is to design a bubble eliminator with an optimal shape. This paper discusses the validity of numerical simulation by comparing, using various diameters of the vent port, the numerical results with the results of the experimental flow visualization. Moreover, we focus on the length of the inlet tube and tapered tube of the bubble eliminator and establish a method of selecting them.

Sign in / Sign up

Export Citation Format

Share Document