Fractal Analysis of Raceway Boundary in Blast Furnace Model

2013 ◽  
Vol 313-314 ◽  
pp. 1003-1007
Author(s):  
Ye Sun ◽  
Ren Chen ◽  
Guo Xi Wu ◽  
Li Na Sun
Keyword(s):  
Blast Furnace ◽  
Physical Model ◽  
Particle Velocity ◽  
Fractal Analysis ◽  
Euclidean Geometry ◽  
Fractal Method ◽  
Velocity Contour ◽  
Raceway Size

The raceway boundary described with contour field is coarse and fragmentized, but all of previous studies are based on Euclidean geometry. In this paper, particle velocity contour has been developed to define the raceway boundary. Then the fractal method of calculating raceway size, which describe boundary with extremely un-regular or fragment characteristic, is brought forward in physical model. The results show that the precise raceway boundary can be obtained by particle velocity contour.

Fractal Analysis of Raceway Boundary in COREX Melter Gasifier Model

2011 ◽  
Vol 194-196 ◽  
pp. 38-43
Author(s):  
Zhi Guo Luo ◽  
Zhan Xia Di ◽  
Zong Shu Zou ◽  
Ren Chen
Keyword(s):  
Physical Model ◽  
Surface Area ◽  
Particle Velocity ◽  
Fractal Analysis ◽  
Euclidean Geometry ◽  
Fractal Method ◽  
Corex Melter Gasifier ◽  
Velocity Contour ◽  
Raceway Size

The raceway boundary is coarse and fragmentized, but all of previous studies are based on Euclidean geometry, which regard the dimension of raceway as an integer. In this paper, particle velocity contour has been developed to define the raceway boundary. The fractal method of calculating raceway size, which describe boundary with extremely un-regular or fragment characteristic, is brought forward in physical model. The result shows that the precise raceway boundary can be obtained by particle velocity contour, and the surface area of ellipsoidal raceway based on fractal is larger than that based on Euclidean.

scholarly journals Comparison of Blast Furnace Raceway Size with Theory

2006 ◽  
Vol 46 (2) ◽  
pp. 195-201 ◽  
Author(s):  
G. S. Gupta ◽  
V. Rudolph
Keyword(s):  
Blast Furnace ◽  
Raceway Size

scholarly journals Prediction of Raceway Size in Blast Furnace from Two Dimensional Experimental Correlations

2004 ◽  
Vol 44 (8) ◽  
pp. 1298-1307 ◽  
Author(s):  
S. Rajneesh ◽  
S. Sarkar ◽  
G. S. Gupta
Keyword(s):  
Blast Furnace ◽  
Two Dimensional ◽  
Raceway Size

Self-affine Fractal Modelling of Aircraft Echoes from Low-resolution Radars

2016 ◽  
Vol 66 (2) ◽  
pp. 151
Author(s):  
L. Q. Sheng ◽  
J.H. Pei ◽  
X.Y. Liu
Keyword(s):  
Dynamic Characteristics ◽  
Fractal Analysis ◽  
Fractal Theory ◽  
The Self ◽  
Target Classification ◽  
Low Resolution ◽  
Fractal Method ◽  
Fractal Characteristics ◽  
Nonlinear Modulation ◽  
Fractal Representation

<p>For complex targets, the non rigid vibration of an aircraft as well as its attitude changes and the rotation of its rotating parts will induce complex nonlinear modulation on its echo from low-resolution radars. If one performs the fractal analysis of measures on an aircraft echo, it may offer a fine description of the dynamic characteristics which induce the echo structure. On basis of introducing self-affine fractal theory, the paper models real recorded aircraft echo data from a low-resolution radar using the self-affine fractal representation, and investigates the application of echo self-affine fractal characteristics in aircraft target classification. Results analysis shows that aircraft echoes from low-resolution radars can be modelled by using the self-affine fractal method, and the self-affine fractal features can be effectively applied to target classification and recognition.</p><p> </p>

Development of 3-D mathematical model of raceway size in blast furnace

2016 ◽  
Vol 43 (4) ◽  
pp. 308-315 ◽  
Author(s):  
Y. L. Li ◽  
S. S. Cheng ◽  
P. Zhang ◽  
J. Guo
Keyword(s):  
Mathematical Model ◽  
Blast Furnace ◽  
Raceway Size

scholarly journals Influence of the Bed Type on the Flow Resistance Change During the Two-Phase (Gas + Powder) Flow through the Descending Packed Bed

2014 ◽  
Vol 59 (2) ◽  
pp. 795-800 ◽  
Author(s):  
B. Panic
Keyword(s):  
Blast Furnace ◽  
Physical Model ◽  
Iron Powder ◽  
Surface Properties ◽  
Flow Resistance ◽  
Gas Flow ◽  
Chemical Processes ◽  
Powder Flow ◽  
Gas Velocity ◽  
Powder System

Abstract The flow of gases with powder in the countercurrent to the charge materials occurs in many chemical processes. In the shaft metallurgical devices, the physical and chemical processes take place also in the countercurrent system. An important issue is that there are no disruptions of the flow in this multiphase system. Under real operating conditions of the device, the powder is generated within the process and its source is the charge or it is inserted to the device within the process procedure. In this system, a problem of bed particle suspension appears. That is why the author undertook investigations on the gas - powder flow in the descending bed. A physical model of this system was constructed. The experiments were performed and the influence of gas velocity, a type and size of the bed and powder particles as well as the powder concentration in the gas was established. Conditions when the descending bed suspension occurs were defined. In the case of physical model with glass materials, the suspension of bed did not occur. Therefore, investigations using beds of high alumina materials, blast furnace pellets and iron powder were performed. The results are presented below. When the bed of glass spheres was replaced with the bed of alumina spheres, a considerable increase in the volume of powder held up in the bed the gas flow resistance were observed. The surface properties of bed particles changed and better conditions for powder holdup were created. The actual gas velocity in the bed increased due to void fraction reduction. Replacement of the glass powder with the iron powder caused a change in the powder density, its surface properties and the shape factor. Greater amounts of the iron powder were held up in the bed and the gas flow resistance increased. Comparing the alumina particle bed - iron powder system to the blast furnace pellet bed - iron powder system, changes in the surface properties of bed particles and the void fraction of bed changed. The study results were the basis for defining conditions of the descending bed suspension.

scholarly journals Application of a multi-stage fractal method in analysis masterpieces of Islamic architecture – Ahmad Shah Mosque.

2018 ◽  
Author(s):  
Халед Д. Альдин Исмаил ◽  
Михаил Юрьевич Шишин
Keyword(s):  
Fractal Analysis ◽  
Fractal Theory ◽  
Spatial Coherence ◽  
Islamic Architecture ◽  
Fractal Method ◽  
Box Counting ◽  
Multi Stage ◽  
Box Counting Dimension ◽  
High Degree ◽  
First Time

В статье обосновывается авторский подход фрактального анализа памятников архитектуры на основе ячеистого вычисления размерности (the box counting dimension method, DB). Он охватывает основные пространственные и художественные характеристики (плана, фасада и разреза) и верифицируется на основе поиска фрактальных согласований в памятнике исламской архитектуры – мечети Ахмад Шаха в Стамбуле. Доказывается прямая зависимость высокой степени фрактальности памятника и его художественных и эстетических характеристик. Впервые осуществляется исследование известного памятника исламской архитектуры. Работа призвана внести вклад в теорию анализа архитектурных объектов, результаты ее могут быть в методологическом плане использованы в практике проектирования, в первую очередь в храмовых сооружениях. This paper presents approaches to the fractal analysis of architectural monuments basing on the box counting dimension method (DB) and the spatial coherence of the basic and artistic characteristics (plan, elevation & section). It is verified by the example of fractal coherence in Islamic architectural monuments (Mosque of Ahmad Shah in Istanbul). A direct dependence of a high degree of fractality of the two monuments is substantiated on its artistic and aesthetic features. For the first time carried out a study based on fractal theory to these outstanding monuments of Islamic architecture. The work aims at further investigation of fractal theory in relationship with the architectural objects.

Sign in / Sign up

Export Citation Format

Share Document