scholarly journals On an electrodynamic method for the determination of the OHM. The experimental measurement of the constant of a long induction-coil

1883 ◽  
Vol 15 (92) ◽  
pp. 149-150
Author(s):  
G. Lippmann
Keyword(s):  
Experimental Measurement ◽  
Induction Coil

scholarly journals Effect of the load of drive axles and high of the curtain on stress-strain properties of the tractor

2007 ◽  
Vol 55 (4) ◽  
pp. 77-88 ◽  
Author(s):  
Tomáš Šmerda ◽  
František Bauer
Keyword(s):  
Experimental Measurement ◽  
Rolling Resistance ◽  
Front Axle ◽  
Load Reduction ◽  
Chassis Dynamometer ◽  
Stress Strain

The goal of the experimental measurement was determination of relation among weight load of the tractor together, hitch height changes and drawbar characteristic. The measurement was realized on chassis dynamometer at MUAF in Brno. The first step consisted of rated speed characteristics measurement in conformity with OECD demands. The drawbar characteristic was measured under two selected gears. Adding 980 kg to the nominal wight of the tractor brought increasing maximal drawbar power and drawbar force together with decreasing of slip. The highest differences were observed during the mesurement of fifth gear shifted. The drawbar force grew up to 18.9% as well as the maximal drawbar power (15.2%). The maximal drawbar power at ninth gear gave 62.8 kW. The hitch height was setting to 0.54 m; 0.64 m and 0.74 m. When the hitch height was set from 0.54 m to 0.74 m the drawbar force an power on front axle was lower by reason of load reduction. As can be noticed from the final drawbar characteristics, both curves are identical up to border of maximal drawbar power. Small differences in the area of the highest slips can be ascribed to the rolling resistance.

scholarly journals Mathematical simulation of temperature influence on pressure drop at pump suction line

2019 ◽  
Vol 213 ◽  
pp. 02069
Author(s):  
Tomáš Polášek ◽  
Adam Bureček ◽  
Lumír Hružík
Keyword(s):  
Pressure Drop ◽  
Physical Properties ◽  
Mathematical Simulation ◽  
Flow Rate ◽  
Experimental Measurement ◽  
Mineral Oil ◽  
Temperature Influence ◽  
Oil Flow ◽  
Suction Line

The article is focused on mathematical simulation of the temperature influence on the pressure drop at the pump suction line. It is evaluated pressure drop depending on mineral oil flow rate. The courses of individual dependencies are determined by mathematical simulation using the ANSYS CFD computing software. The temperature affects significantly physical properties of the flowing mineral oil. In a paper is also described the experimental measurement of a mineral oil sample and determination of its physical properties depending on temperature.

scholarly journals Annual Variation in Energy Consumption of an Electric Vehicle Used for Commuting

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4639 ◽  
Author(s):  
Anatole Desreveaux ◽  
Alain Bouscayrol ◽  
Elodie Castex ◽  
Rochdi Trigui ◽  
Eric Hittinger ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Electric Vehicle ◽  
Experimental Measurement ◽  
Air Conditioning ◽  
Annual Variation ◽  
Accurate Determination ◽  
Driving Cycle ◽  
Simulation Tool ◽  
Real Vehicle

The energy consumption of an electric vehicle is primarily due to the traction subsystem and the comfort subsystem. For a regular trip, the traction energy can be relatively constant but the comfort energy has variation depending on seasonal temperatures. In order to plan the annual charging operation of an eco-campus, a simulation tool is developed for an accurate determination of the consumption of an electric vehicle throughout year. The developed model has been validated by comparison with experimental measurement of a real vehicle on a real driving cycle. Different commuting trips are analyzed over a complete year. For the considered city in France (Lille), the comfort energy consumption has an overconsumption up to 33% in winter due to heating, and only 15% in summer due to air conditioning. The urban commuting driving cycle is more affected by the comfort subsystem than extra-urban trips.

Determination of Photon Attenuation Coefficients of Steel Doped Barite Plasters

2019 ◽  
Vol 11 (11) ◽  
pp. 1075-1078
Author(s):  
İskender Akkurt ◽  
Kadir Günoğlu ◽  
Şemsettin Kılınçarslan
Keyword(s):  
Experimental Measurement ◽  
Computer Code ◽  
Gamma Spectrometer ◽  
Attenuation Coefficients ◽  
Photon Attenuation ◽  
Decorative Material ◽  
Radioactive Sources

The plaster is used as a flattening of the interior and exterior surfaces of the buildings and as decorative material. In this study, photon attenuation coefficients of barite plaster containing steel were measured. The measurements performed at 511, 835 and 1275 keV which are obtained from 22Na and 54Mn radioactive sources, using a gamma spectrometer that contains a NaI(Tl) detector and MCA. The measured results were compared with the calculation obtained using computer code of XCOM for 1 keV–1 GeV gamma energies. Also, half value layer (HVL) and tenth value layer (TVL) were calculated using the results obtained from the experimental measurement.

scholarly journals Experimental Measurement of Conducted Emissions Generated by Static Converters in Common and Differential Modes

2021 ◽  
Vol 23 (3) ◽  
pp. 273-279
Author(s):  
Helima Slimani ◽  
Abdelhakim Zeghoudi ◽  
Abdelber Bendaoud ◽  
Abdeldjalil Reguig ◽  
Baghdadi Benazza ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Experimental Measurement ◽  
Experimental Measurements ◽  
Power Electronic ◽  
Power Electronic Converters ◽  
Static Converters ◽  
Energy Conversion Systems ◽  
Conducted Emissions

The commutation of semiconductors and their interactions with parasitic elements linked to the environment is known to be the main source of interferences conducted in power electronic converters. Thus, identifying these sources of interferences in commutation cells and determining the level of these conducted emissions generated in energy conversion systems presents a major challenge for designers. In this work, a study of the electromagnetic interferences (EMI) generated by the association of serial rectifier-chopper connected to a Line Impedance Stabilization Network (LISN) is proposed, in which a determination of these interferences is presented in both common and differential modes. All simulations are carried out using the LT-spice software and the results obtained are validated by experimental measurements realized at APELEC laboratory (University of Sidi Bel-Abbes, Algeria).

Elastohydrodynamic Lubrication in an Instrument Ball-Bearing

1976 ◽  
Vol 98 (2) ◽  
pp. 244-248 ◽  
Author(s):  
J. W. Kannel ◽  
D. K. Snediker
Keyword(s):  
Film Thickness ◽  
Experimental Measurement ◽  
Ball Bearing ◽  
Elastohydrodynamic Lubrication ◽  
Primary Parameter ◽  
X Ray ◽  
The Way

The paper deals with experimental measurement of bearing torque and “percentage of lubrication” in instrument size (R6) bearings. The primary parameter found to affect bearing performance for several lubricant investigations is base viscosity. Inference of EHD film thickness is made from the percentage of film measurements which are compared with X-ray data. A reasonable correlation between the two types of data is presented, thereby, paving the way toward the use of the more universally applicable percentage of film measurements for the determination of EHD conditions in real bearing systems.

Interfacial heat and mass transfer in the turbulent flow and its experimental verification

1983 ◽  
Vol 48 (9) ◽  
pp. 2494-2502
Author(s):  
František Vašák ◽  
Václav Kolář ◽  
Zdeněk Brož
Keyword(s):  
Mass Transfer ◽  
Turbulent Flow ◽  
Transfer Coefficient ◽  
Heat And Mass Transfer ◽  
Experimental Verification ◽  
Experimental Measurement ◽  
Schmidt Number ◽  
Theoretical Models ◽  
Interfacial Mass Transfer

Various methods have been discussed of experimental measurement of interfacial mass transfer under the turbulent flow in a tube at high values of the Schmidt number. Difficulties and shortcomings have been discussed of the determination of the mass transfer coefficient k∞+, i.e. the quantity necessary for experimental verification of theoretical models. Necessity has been stressed of devising special experiments to further elucidate the mechanism of interfacial heat and mass transfer in the turbulent flow.

ATOMIC FORCE MICROSCOPE (AFM)-BASED DIGITAL IMAGE SPECKLE CORRELATION (DiSC) TECHNIQUE FOR THE MEASUREMENT OF DEFORMATION IN NANOSCALE

2004 ◽  
Vol 03 (06) ◽  
pp. 789-795
Author(s):  
X. Q. SHI ◽  
J. P. PICKERING ◽  
C. K. WONG
Keyword(s):  
Digital Image ◽  
Experimental Measurement ◽  
Plane Deformation ◽  
Measurement Techniques ◽  
Correlation Method ◽  
Electronic Packages ◽  
Wafer Level ◽  
Speckle Correlation ◽  
Atomic Force

Experimental measurement techniques for the determination of stress levels and distributions will be one of most important keys for the optimization of the design of the next generation electronic packages, e.g., nano-wafer-level packages. However, current experimental photo-mechanics techniques are often found to be insufficiently sensitive but also lacking in sufficient resolution to determine stress distributions of nanoscale electronic packages. In this study, the digital image speckle correlation method was combined with the atomic force microscopy (AFM) to develop a new experimental measurement technique, so-called nanodigital image speckle correlation (Nano-DiSC), for the determination of deformation on the nanometer scale. With the developed theoretical model, computational algorithms and nanospeckle pattern preparation method, the Nano-DiSC methodology was found to be able to measure the in-plane deformation on the sub-10 nm scale.

scholarly journals 3D Simulation of an Automotive Wheel Hub and Induction Hardening Coil to Solve Coil Lifetime Issues

2021 ◽  
Author(s):  
Sean M. Muyskens ◽  
Tareq I. Eddir ◽  
Robert C. Goldstein
Keyword(s):  
Failure Modes ◽  
Practical Knowledge ◽  
Experimental Testing ◽  
Virtual Prototyping ◽  
Induction Hardening ◽  
Induction Coil ◽  
Element Analysis ◽  
Cause Of Failure

Abstract This paper will revisit a case study originally done for ASM HTS Conference in 2009. The goal then was to solve an induction coil lifetime issue of an induction coil for heat treatment of an automotive wheel hub. At the time, computer simulation was beginning to allow for full virtual prototyping of heat treat applications as an alternative to experimental testing. While practical knowledge allowed for the successful determination of the cause of short coil life, and iterative simulation led to implementation of a longer lasting coil that met the required pattern, simulation was not used at the time to pinpoint the cause of failure. As faster computing becomes more widely available and finite element analysis (FEA) improves in scope and accuracy, virtual prototyping and detection of these failure modes are becoming faster and lower cost options compared to the traditional test and trial method. To highlight the leaps made in virtual prototyping, this case study that was previously done as an axisymmetric 2D model will be done in 3D electromagnetic plus thermal with rotation for the full part.

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