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Online since: April 2017
Authors: Qun Zheng, Salman Abdu, Gambo Kofar Bai Dayyabu, Hai Zhang
It was noted that, the use of a constant shape factor might not be sufficient when considering wet compression effects.
To determine the size of child droplet after breakup: (11) Where Kbr is the breakup constant depending on droplet breakup regimes and is given by Weber number of water droplet: (12) Where ω is the oscillation frequency, k1, k2 and k3 are breakup factors. 2.3 Droplet and wall interaction model When water droplet passes over the rotor region, its impact changes on the mass, momentum and energy of water droplet as shown in Fig. 2.
Subsequently, in fig.4c, the shockwaves intensity breaks due high amount of injection rate and low slip velocity, thus, reduces the properties of the fluids i.e. temperature and density much lower toward the trailing edge.
(a) Inlet mass flow against droplets diameter (b) Outlet temperature against droplet diameter Figure 9 Variation of inlet mass flow rate and outlet temperature with nozzles droplet diameter at different injection rate Fig.9 (a) Shows effects of inlet mass flow rate under different droplet diameters of wet compression, it’s obvious that certain factors like evaporation and convection affect the mass flowrate of the compressor, however droplet diameter is equally another contributing factor.
Dynamic viscosty of the air and water are quite known but in wet compression, where air and water mixed together the properties behaviour changes as shown in the diagram above. in all the two graphs, dynamic viscosity of water droplets decreases with decrease in the amount of water droplet, similarly, the decrease of the dynamic viscosity appreciate along the streamwise position with increase in the blade span.
To determine the size of child droplet after breakup: (11) Where Kbr is the breakup constant depending on droplet breakup regimes and is given by Weber number of water droplet: (12) Where ω is the oscillation frequency, k1, k2 and k3 are breakup factors. 2.3 Droplet and wall interaction model When water droplet passes over the rotor region, its impact changes on the mass, momentum and energy of water droplet as shown in Fig. 2.
Subsequently, in fig.4c, the shockwaves intensity breaks due high amount of injection rate and low slip velocity, thus, reduces the properties of the fluids i.e. temperature and density much lower toward the trailing edge.
(a) Inlet mass flow against droplets diameter (b) Outlet temperature against droplet diameter Figure 9 Variation of inlet mass flow rate and outlet temperature with nozzles droplet diameter at different injection rate Fig.9 (a) Shows effects of inlet mass flow rate under different droplet diameters of wet compression, it’s obvious that certain factors like evaporation and convection affect the mass flowrate of the compressor, however droplet diameter is equally another contributing factor.
Dynamic viscosty of the air and water are quite known but in wet compression, where air and water mixed together the properties behaviour changes as shown in the diagram above. in all the two graphs, dynamic viscosity of water droplets decreases with decrease in the amount of water droplet, similarly, the decrease of the dynamic viscosity appreciate along the streamwise position with increase in the blade span.
Online since: May 2024
Authors: Abdellatif Khamlichi, Bouraida El Yamouni, Fadoua El Khannoussi
Importantly, the findings revealed a significant impact resulting from cohesion, affecting both the profile and magnitude of earth pressure acting on the retaining wall under dynamic excitation.
Constitutive laws and material properties The foundation and backfill soils are assumed to behave according to the constitutive law termed: the Hardening Soil model with Small-strain Stiffness (HSsmall) [9,24].
Table 1 summarises the mechanical and geometric parameters of the wall/soil system.
The properties of coupling elements are deduced from the parameters of the adjacent soil.
The objective pursued is to assess the synergetic influence of these factors on the seismic response of the coupled wall-soil system.
Constitutive laws and material properties The foundation and backfill soils are assumed to behave according to the constitutive law termed: the Hardening Soil model with Small-strain Stiffness (HSsmall) [9,24].
Table 1 summarises the mechanical and geometric parameters of the wall/soil system.
The properties of coupling elements are deduced from the parameters of the adjacent soil.
The objective pursued is to assess the synergetic influence of these factors on the seismic response of the coupled wall-soil system.
Online since: October 2016
Authors: Tobias Lieske, Denis Shuklin, Daniel Hohnloser, Marc Reichenbach, Benjamin Pfundt, Dietmar Fey, Robert Weigel
The integration leads to a smaller overall footprint and reduced
power consumption, which positively affects the acceptance rate of distributed smart sensor networks
for home automation.
For this task a low-power third party radio frequency (RF) module intellectual property (IP) block will be used.
For this process, the material properties play an important role.
The oversampling factor was set to 512 resulting in clock frequency of 1024 KHz with the input signal bandwidth of 1 kHz.
The integrator capacitors were sized according to maximum permitted noise in-band power (resulting from aforementioned SNR requirement) and calculated coefficients of integrator gain factors.
For this task a low-power third party radio frequency (RF) module intellectual property (IP) block will be used.
For this process, the material properties play an important role.
The oversampling factor was set to 512 resulting in clock frequency of 1024 KHz with the input signal bandwidth of 1 kHz.
The integrator capacitors were sized according to maximum permitted noise in-band power (resulting from aforementioned SNR requirement) and calculated coefficients of integrator gain factors.
Online since: March 2011
Authors: Matthew O. Zacate, Herbert Jaeger
The Ak are called the anisotropy factors.
Table 1: Properties of PAC probe nuclei relevant for this volume.
Compared to simple leading edge triggering this provides superior timing properties as it eliminates amplitude-dependent walk for signals with variations in rise times.
Examples This section examines how information about the properties and the processes related to defects can be obtained from parameters in Eq. 24 when fitting PAC spectra.
Lattice relaxations can reduce further the symmetry of the local crystal structure and the induced EFG, thereby affecting the orientation of the EFG principal axes as well as the values of the components (and the measured interaction frequencies).
Table 1: Properties of PAC probe nuclei relevant for this volume.
Compared to simple leading edge triggering this provides superior timing properties as it eliminates amplitude-dependent walk for signals with variations in rise times.
Examples This section examines how information about the properties and the processes related to defects can be obtained from parameters in Eq. 24 when fitting PAC spectra.
Lattice relaxations can reduce further the symmetry of the local crystal structure and the induced EFG, thereby affecting the orientation of the EFG principal axes as well as the values of the components (and the measured interaction frequencies).
Online since: August 2023
Authors: Oleg Semkiv, Andrii Kondratiev, Tetyana Nabokina, Oleksandr Gaidachuk, Svetlana Shapoval
However, prepreg production is associated with a number of harmful factors, adversely affecting the participants in the technological process and the environment [9, 10].
These factors were studied by a number of authors, but the efficiency of technological processes in the most of papers is evaluated either by the labor intensity or the cost and energy consumption, or by these criteria taken together.
Jawaid, A review on thermomechanical properties of polymers and fibers reinforced polymer composites.
Prontsevych, Stabilization of physical-mechanical characteristics of honeycomb filler based on the adjustment of technological techniques for its fabrication.
These factors were studied by a number of authors, but the efficiency of technological processes in the most of papers is evaluated either by the labor intensity or the cost and energy consumption, or by these criteria taken together.
Jawaid, A review on thermomechanical properties of polymers and fibers reinforced polymer composites.
Prontsevych, Stabilization of physical-mechanical characteristics of honeycomb filler based on the adjustment of technological techniques for its fabrication.
Online since: June 2023
Authors: Fredrick Njuguna, Benson Gathitu, Meshack Hawi, Jotham Munyalo, Hiram Ndiritu
BOX 62000-00200, Nairobi, Kenya.
2Department of Mechanical Engineering, College of Engineering and Technology, Jomo Kenyatta University of Agriculture and Technology, P.O.
Subsequently, this affects the reaction rates in fluidized bed gasifiers and in turn affecting gas composition and yield [6].
Granular temperature Kinetic theory of granular flow (KTGF) concept is widely used to determine the dispersed phase properties [24].
Furthermore, the figures show that the bed pressure drop increased roughly by a factor of two when the initial bed height changed from H=D to H=2D but the minimum fluidization point remained unaffected.
The temperature effect on Umf can be attributed to the behavior of air properties (density and viscosity) with temperature.
Subsequently, this affects the reaction rates in fluidized bed gasifiers and in turn affecting gas composition and yield [6].
Granular temperature Kinetic theory of granular flow (KTGF) concept is widely used to determine the dispersed phase properties [24].
Furthermore, the figures show that the bed pressure drop increased roughly by a factor of two when the initial bed height changed from H=D to H=2D but the minimum fluidization point remained unaffected.
The temperature effect on Umf can be attributed to the behavior of air properties (density and viscosity) with temperature.
Online since: October 2013
Authors: Anucha Watanapa, Sumol Sae Heng Pisitsungkakarn, Putthadee Ubolsook
Moreover, researchers have tested the chemical and mechanical properties of ash and found that the main element of ash is silica for around 80-90%.
As for the experiment with the high compressive strength brick with different mixtures of alumina and ash, this would be done according to the standards about the physical properties of the high compressive strength brick.
However, different temperature for burning could be another factor which could affect the water absorption.
When this was compared to the research by Chaiwat [6] into the development of the properties of clay brick with mixture of ash, the compressive strength of such clay-mixture brick was 55.92 kg/cm2.
Sisomsak: The Development of Properties of High Compressive Strength Brick Mixed with Ash (Master’s thesis in Science, Department of Civil Engineering, King Mongkut’s University of Technology Thonburi 2005)
As for the experiment with the high compressive strength brick with different mixtures of alumina and ash, this would be done according to the standards about the physical properties of the high compressive strength brick.
However, different temperature for burning could be another factor which could affect the water absorption.
When this was compared to the research by Chaiwat [6] into the development of the properties of clay brick with mixture of ash, the compressive strength of such clay-mixture brick was 55.92 kg/cm2.
Sisomsak: The Development of Properties of High Compressive Strength Brick Mixed with Ash (Master’s thesis in Science, Department of Civil Engineering, King Mongkut’s University of Technology Thonburi 2005)
Online since: August 2018
Authors: Wei Pan, Min Wang, Zi Yuan Wang, Ya Jie Yuan
It interacts with many inorganic materials, and shows unusual colloidal and complexing properties [14].
The PVP has shown a good colloidal and complexing properties with the aluminum sol to change the viscosity and the wettabilityof the Al2O3sol.
And the wetting properties of the Al2O3 sol are also need further study.
Pan, "Properties of Yttria-Stabilized-Zirconia Based Ceramic Composite Abradable Coatings," Key Engineering Materials, 512-515 (2012) 1551-54
Vaßen, "Ceramic top coats of plasma-sprayed thermal barrier coatings: materials, processes, and properties," Journal of Thermal Spray Technology, 26[6] (2017) 992-1010
The PVP has shown a good colloidal and complexing properties with the aluminum sol to change the viscosity and the wettabilityof the Al2O3sol.
And the wetting properties of the Al2O3 sol are also need further study.
Pan, "Properties of Yttria-Stabilized-Zirconia Based Ceramic Composite Abradable Coatings," Key Engineering Materials, 512-515 (2012) 1551-54
Vaßen, "Ceramic top coats of plasma-sprayed thermal barrier coatings: materials, processes, and properties," Journal of Thermal Spray Technology, 26[6] (2017) 992-1010
Online since: March 2016
Authors: Fang Fang Zhang, Jian Can Yang, Lin Huang
Main factors of sintering: the sintering temperature and time, temperature gradient.
The result shows that the electrical properties of nanocrystalline W-La2O3 electrode are better than the traditional coarse grain powder metallurgy electrodes.
Zhou, et al., The properties of the binary composite rare earth tungsten electrode materials, Acta Metallurgica Sinica, 1999, 3 (In Chinese) [4] Nie Z, Zhou M, Chen Y, et al.
Influence of CeO2-Doping on Electrical Properties of HfO2 Gate Dielectrics [J].
Properties of RE–W cathode and its application in electrostatic precipitation for high temperature gas clean-up[J].
The result shows that the electrical properties of nanocrystalline W-La2O3 electrode are better than the traditional coarse grain powder metallurgy electrodes.
Zhou, et al., The properties of the binary composite rare earth tungsten electrode materials, Acta Metallurgica Sinica, 1999, 3 (In Chinese) [4] Nie Z, Zhou M, Chen Y, et al.
Influence of CeO2-Doping on Electrical Properties of HfO2 Gate Dielectrics [J].
Properties of RE–W cathode and its application in electrostatic precipitation for high temperature gas clean-up[J].
Online since: October 2006
Authors: Yasutaka Sanuki, Shigeru Yoshida, Akira Tomioka, Ken Etsu Uwamori, Hiroyuki Fujimoto, Hiroshi Hata, Hiroki Kamijo, Ken Nagashima, Kazuya Ikeda, Masataka Iwakuma, Kazuo Funaki, Hisao Yamada
Electronics and communication systems operated on a daily
basis are important factors in the provision of a safe and reliable transport system.
For future HTS transformers with the advantageous properties, a goup of Kyushu Univ. designed and developed a 500 kVA-800 kVA HTS transformer test device cooled by liquid nitrogen-subcooled liquid nitrogen, [23], where the windings are parallel conductors of Bi-2223 tapes with transposition.
For practical applications, Ag-sheathed (Bi,Pb)2Sr2Ca2Cu3OX (Bi2223) superconducting wires with multi filamentary structure made by the Powder-In-Tube (PIT) process have made much progress, and Jc, Je, Ic, length, homogeneity, mechanical properties, sheath properties, AC loss at liquid nitrogen (77K), mass production technology and cost have been improved remarkably for applications.
Recently, the controlled over pressure sintering process has been developed [28] to improve superconducting and mechanical properties by reducing cracks formed by rolling and increasing mass density.
It is impossible to obtain a total loss value by adding together the loss for each winding because the magnetic field imposed on the winding from other windings has a significant affects on the loss.
For future HTS transformers with the advantageous properties, a goup of Kyushu Univ. designed and developed a 500 kVA-800 kVA HTS transformer test device cooled by liquid nitrogen-subcooled liquid nitrogen, [23], where the windings are parallel conductors of Bi-2223 tapes with transposition.
For practical applications, Ag-sheathed (Bi,Pb)2Sr2Ca2Cu3OX (Bi2223) superconducting wires with multi filamentary structure made by the Powder-In-Tube (PIT) process have made much progress, and Jc, Je, Ic, length, homogeneity, mechanical properties, sheath properties, AC loss at liquid nitrogen (77K), mass production technology and cost have been improved remarkably for applications.
Recently, the controlled over pressure sintering process has been developed [28] to improve superconducting and mechanical properties by reducing cracks formed by rolling and increasing mass density.
It is impossible to obtain a total loss value by adding together the loss for each winding because the magnetic field imposed on the winding from other windings has a significant affects on the loss.