scholarly journals Experimental Study of Mathematical Models of the Heating Defect Coefficient for the Heating-Cooling Cycles of an Electrical Connection

2021 ◽  
Vol 666 (3) ◽  
pp. 032013
Author(s):  
I V Ignatenko ◽  
S A Vlasenko ◽  
M V Nakonechniy
Keyword(s):  
Experimental Study ◽  
Mathematical Models ◽  
Electrical Connection

scholarly journals AN EXPERIMENTAL STUDY ON SAND DUNE SEDIMENT TRANSPORT DUE TO TSUNAMI OVERWASH

2017 ◽  
pp. 15
Author(s):  
K M Ahtesham Hossain Raju ◽  
Shinji Sato
Keyword(s):  
Experimental Study ◽  
Sediment Transport ◽  
Mathematical Models ◽  
Storm Surge ◽  
Laboratory Study ◽  
Sand Dune ◽  
Small Scale ◽  
Data Set ◽  
Grain Sizes ◽  
Dry Sand

Response of sand dune when overwashed by tsunami or storm surge, is investigated by conducting small scale laboratory study. Dune consisting of initially wet sand and initially dry sand are tested for three different sand grain sizes. Overtopping of water and the corresponding sediment transport are analyzed. These data set can be used to validate mathematical models associated with dune sediment transport as well as prediction of dune profile.

Experiment Study of Coupling Effect among the Rotary Axes in Simulator

2014 ◽  
Vol 614 ◽  
pp. 304-307
Author(s):  
Guang Hua Li ◽  
Jin Zeng Chen ◽  
Man Lin Long
Keyword(s):  
Experimental Study ◽  
Mathematical Models ◽  
Coupling Effect ◽  
Guidance System ◽  
Experiment Study ◽  
Rotary Axes ◽  
Aerospace Technology

Development of aerospace technology is inseparable from the excellent performances of guidance system. It often tests performances of guidance system on simulator in engineering. It can be drawn that coupling effect among the rotary axes in simulator is present by analyzing mathematical models of simulator. Currently, experimental study carried out for the conclusion about coupling effect among the rotary axes is a few. Therefore, experimental study about coupling effect among the axes at the time of simulator linkage is carried out to determine the existence of such a coupling effect and observe its impact.

Experimental study of force modes for combined reduction and thinning process

2021 ◽  
pp. 545-548
Author(s):  
S.N. Larin ◽  
V.I. Platonov ◽  
P.V. Romanov
Keyword(s):  
Experimental Study ◽  
Mathematical Models ◽  
Cold Reduction ◽  
Thinning Process

The operation of cold reduction and simultaneous thinning of the wall in the workpiece is considered. The power parameters of this operation are studied. The researches is carried out experimentally. Secondary mathematical models are obtained from the results of the experiment.

scholarly journals Development and Testing of a Block Hydrocyclone

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1577
Author(s):  
Alexandr Repko ◽  
Milan Sága ◽  
Boris Sentyakov ◽  
Vladislav Sviatskii
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Reynolds Number ◽  
Mathematical Models ◽  
High Strength ◽  
Fluid Consumption ◽  
Fluid Filtration ◽  
Fluid Movement ◽  
First Time ◽  
Made In

The study aimed to theoretically substantiate the efficiency of liquid purification and obtain corroborating experimental data for a hydrocyclone, consisting of several blocks. Mathematical models of the process of hydrodynamic fluid filtration were developed with the use of screw swirlers. The obtained mathematical models characterize all the main processes of fluid movement in various zones of the functioning of the hydrocyclone. Formulas for calculating the structures of hydrocyclone blocks are included. A block for swirling the flow of the liquid to be cleaned has been made in the form of a three-way screw. For the first time, wear-resistant and high-strength plastic ZEDEX ZX-324 has been used as a material. An experimental study was conducted and the change in the Reynolds number and the coefficient of fluid consumption was shown, using different constructions of the three-way screw. The research results confirmed the correctness and sufficiency of mathematical models for the development and production of block hydrocyclones.

scholarly journals Study on the Dynamics of Local Pressure Boosting Pneumatic System

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Yan Shi ◽  
Guanwei Jia ◽  
Maolin Cai ◽  
Weiqing Xu
Keyword(s):  
Experimental Study ◽  
Mathematical Models ◽  
Pressure Wave ◽  
Wave Amplitude ◽  
Optimization Method ◽  
Local Pressure ◽  
Pressure System ◽  
Output Pressure ◽  
Pressure Wave Amplitude ◽  
Influence Degree

Local pressure boosting system is a complex and switched system, which is widely used in modern pneumatic systems, to optimize local pressure boosting system; firstly, the basic and the dimensionless mathematical models of the local pressure system were setup. Furthermore, the mathematical models were verified through the experimental study on the local pressure boosting system. Moreover, the influences of the tank’s three main parameters on the performance of local pressure boosting system were studied. It can be seen that the pressure wave amplitude is mainly affected by the dimensionless volume of the tank; its influence degree is 95.1%, and it increases when the later one decreases. The pressure loss of the tank is mainly affected by the dimensionless output pressure, and its influence degree is 68.7%, and it decreases rapidly with the increase of the dimensionless output pressure of the tank. Last, the optimization method of the local pressure boosting system was obtained.

scholarly journals Approximation Of Scours Using Terrestrial 3D Laser Scanning

2015 ◽  
Vol 5 (1) ◽  
pp. 31-36
Author(s):  
Andreea Florina Jocea ◽  
E. G. Crăciun ◽  
A. Anton
Keyword(s):  
Experimental Study ◽  
Mathematical Models ◽  
Present Article ◽  
Laser Scanning ◽  
Laser Scanner ◽  
Bridge Pier ◽  
Design Stage ◽  
Terrestrial Laser Scanner ◽  
3D Laser Scanning ◽  
Over Time

Abstract In designing artwork as bridges, hydraulic calculations have a very important role due to the fact that they are behind their sizing. Bridge designer must therefore possess knowledge of hydrology, hydraulics of bridges and river banks regularization. A problem that arises during the design stage of bridges is the scour phenomenon surrounding bridge pier. Over time, there have been conducted a number of studies which led to the provision of a plurality of mathematical models that are intended scour prediction. In the present article we will present an experimental study to determine the bed profile and measurement of scours products around a pier bridge using 3D terrestrial laser scanner.

Improvement of Stamping by Rolling Processes of Pipe and Cylindrical Blades on Experimental Research

2020 ◽  
Vol 844 ◽  
pp. 168-181
Author(s):  
Andrii Shtuts ◽  
Mykola Kolisnyk ◽  
Andrii Vydmysh ◽  
Oleksandr Voznyak ◽  
Serhii Baraban ◽  
...  
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Mathematical Models ◽  
Experimental Research ◽  
Lateral Surface ◽  
Side Surface

During the experimental study, a pronounced beating and sealing of the side surface of the tubular, cylindrical blanks was recorded. It is established that cracks appear and develop in the central part of the lateral surface, i.e., it are destroyed. This fact confirms the claim that the destruction of tubular, cylindrical blanks of some materials begins on the side surface. It is established that the bases of analytical dependencies between the components of deformations describe the obtained results of the experimental study of SR tubular, cylindrical blanks within the error of the experimental data, which made it possible to construct a number of mathematical models for the purpose of further study of the SDS and the method of their determination.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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