Loss Determination of Hollow-core Waveguides by Optically-induced Particle Transport

2007 ◽  
Author(s):  
Philip Measor ◽  
Sergei Kühn ◽  
Holger Schmidt ◽  
Evan J. Lunt ◽  
Aaron R. Hawkins
Keyword(s):  
Particle Transport ◽  
Hollow Core ◽  
Loss Determination ◽  
Optically Induced

scholarly journals Hollow-core waveguide characterization by optically induced particle transport

2008 ◽  
Vol 33 (7) ◽  
pp. 672 ◽  
Author(s):  
Philip Measor ◽  
Sergei Kühn ◽  
Evan J. Lunt ◽  
Brian S. Phillips ◽  
Aaron R. Hawkins ◽  
...  
Keyword(s):  
Particle Transport ◽  
Hollow Core ◽  
Optically Induced

scholarly journals Determination of reinforcing bars for tests of hollow core slabs with continuity

2013 ◽  
Vol 6 (6) ◽  
pp. 903-932
Author(s):  
A. P. Santos ◽  
M. A. Ferreira ◽  
R. C. Carvalho ◽  
L. M. Pinheiro
Keyword(s):  
Shear Strength ◽  
The Other ◽  
Hollow Core ◽  
Reinforcing Bars ◽  
Simply Supported ◽  
Resistance Moment ◽  
Hollow Core Slab ◽  
Maximum Shear Strength

The structural designs of floors formed by hollow core slabs usually consider these as simply-supported slabs. In recent years there have been project changes and hollow core slabs with continuity are widely used. The objective of this study is to suggest a way to calculate the reinforcement bars to be used in tests with continuity provided by a structural topping. Thus, this paper presents a method based on the maximum positive resistance moment and maximum shear strength of a hollow core slab. The method is applied to a test in hollow core slab specimens which have the following dimensions: 2 m width, 6 m long, and 21 cm high. The results indicated that the method was satisfactory to the performed test, and can therefore be applied to the other test configurations or even designs.

Consideration of the Torsional Stiffness in Hollow-Core Slabs’ Design

2019 ◽  
Vol 968 ◽  
pp. 330-341
Author(s):  
Talyat Azizov ◽  
Wit Derkowski ◽  
Nadzieja Jurkowska
Keyword(s):  
Finite Elements ◽  
Precast Concrete ◽  
Numerical Data ◽  
Torsional Stiffness ◽  
System Of Equations ◽  
Hollow Core ◽  
Floor Slabs ◽  
Formation Of Cracks ◽  
Resolving System

The paper discusses the principles of precast concrete hollow-core slabs taking into account their spatial work. It is shown that consideration of spatial work makes it possible to determine the forces in individual floor slabs significantly more precise. The fact that strain redistribution between precast floor slabs depends on slabs’ bending and torsional stiffness is shown. The research has been mostly devoted to determination of the bending stiffness with regard to formation of cracks and the change in torsional stiffness, especially considering the presence of normal cracks, which is still unstudied. This paper presents the technique for determining the torsional stiffness of hollow-core slabs with normal cracks. In order to determine the components included in the resolving system of equations, it is proposed to use an approximation method based on the processing of numerical data using spatial finite elements.

A New Statistical-Based Correlation for the Compressor Tandem Cascade Parameters Effects on the Loss Coefficient

2007 ◽  
Author(s):  
Vitaliy Yu. Nezym ◽  
Georgiy P. Polupan
Keyword(s):  
Guide Vane ◽  
Group Method ◽  
Data Handling ◽  
Blade Profile ◽  
Suction Surface ◽  
Tandem Configuration ◽  
Parametric Test ◽  
Layer Control ◽  
Loss Determination

One of the effective methods for improvement of compressor stage operation is a flow control within the compressor passages. An application of boundary layer control on the suction surface of a blade profile may be useful in tandem cascade configuration. Total tandem guide vane consists of a series of two vanes: guide vane (the first segment) and straightening vane (the rear segment). These vanes have a definite shift along the axial and peripheral direction, providing a perfect re-distributing of energy within the blade passages between different flow zones. There are several parameters influencing mainly on loss in a tandem cascade. Experimental results of the parametric test are used for the creation of a statistical model of loss determination of compressor tandem cascade using the Group Method of Data Handling (GMDH). The paper focuses on the statistical-based correlation that encompasses most pertinent parameters featuring tandem configuration and operating condition.

Calorimetric and input-output loss determination of SynRM

2014 ◽  
Author(s):  
L. Aarniovuori ◽  
J. Kolehmainen ◽  
A. Kosonen ◽  
M. Niemela ◽  
J. Pyrhonen
Keyword(s):  
Input Output ◽  
Output Loss ◽  
Loss Determination

scholarly journals The problem of loss determination of technical work of exit gases in a boiler stack-contribution to the solution

Termotehnika ◽  
2016 ◽  
Vol 42 (1) ◽  
pp. 99-111
Author(s):  
Milenko Smiljanic ◽  
Branko Pejovic ◽  
Dragana Keselj ◽  
Mitar Perusic
Keyword(s):  
Technical Work ◽  
Loss Determination
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