Design evaluation of two-roller conveyors for semi-self-flowing transportation

2002 ◽  
Vol 216 (12) ◽  
pp. 1217-1223
Author(s):  
V Kosse
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Scientific Literature ◽  
Frictional Coefficient ◽  
Design Evaluation ◽  
Lateral Direction ◽  
Experimental Modelling ◽  
On Demand ◽  
New Formula ◽  
Good Agreement

In conveyors utilizing the principle of semi-self-flowing transportation, parts are put on a surface moving in the lateral direction by means of vibration or on two rollers rotating in opposite directions. Advantages of the latter one are that parts can be supplied on demand and a very small angle of inclination is required (less than 3°). Formulae found in scientific literature for the velocity of transportation as a function of the roller velocity give large discrepancies with experimental results. Extensive experimental modelling allows the dependence of the frictional coefficient on the shape of parts and the contact angle to be established. A new mathematical model of the conveyor has been developed and a new formula for the velocity of transportation has been derived, which is in good agreement with experimental data.

The Behaviour of Railway Wheelsets and Track at High Frequencies of Excitation

1982 ◽  
Vol 24 (2) ◽  
pp. 103-111 ◽  
Author(s):  
S. L. Grassie ◽  
R. W. Gregory ◽  
K. L. Johnson
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Contact Force ◽  
Analytical Methods ◽  
Dynamical Response ◽  
Frequency Range ◽  
High Frequencies ◽  
Good Agreement

The dynamical response in the frequency range 50–1500 Hz is investigated of a railway wheelset resting on the track and excited vertically, laterally and longitudinally at a point of contact. A mathematical model of a railway wheelset is developed which comprises a few simple components to which analytical methods can be applied. Good agreement is obtained between experimental data and calculations made using this model. For a given sinusoidal displacement imposed between wheel and rail, the contact force is in general greatest longitudinally and least laterally.

Air Flow in Yarn Texturing Nozzles

1987 ◽  
Vol 109 (3) ◽  
pp. 197-202 ◽  
Author(s):  
M. Acar ◽  
R. K. Turton ◽  
G. R. Wray
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Experimental Work ◽  
Air Flow ◽  
Air Jet ◽  
Continuous Filament ◽  
The Mathematical Model ◽  
Experimental Nozzle ◽  
Good Agreement

The air-jet texturing process, a purely mechanical means of texturing continuous filament yarns, is described. Industrial texturing nozzles are reviewed and categorized in two groups, either as converging-diverging or cylindrical type nozzles. A mathematical model is developed for the complex airflow in cylindrical type texturing nozzles, and experimental data obtained from various nozzles verify the flow predicted by this model. The mathematical model is also shown to be in good agreement with the data obtained from a modified experimental nozzle, which has a trumpet shaped diverging exit. Further experimental work with a scaled-up model of a typical industrial texturing nozzle is also reported.

The Modeling and Simulation of Pneumatic ABS Pressure Regulator Based on AMESim

2014 ◽  
Vol 971-973 ◽  
pp. 811-815 ◽  
Author(s):  
Tian Fei Ma ◽  
Qian Chen
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Modeling And Simulation ◽  
Simulation Model ◽  
Dynamic Characteristics ◽  
Commercial Vehicle ◽  
Static Characteristics ◽  
Pressure Regulator ◽  
Characteristic Curves ◽  
Good Agreement

The pneumatic ABS pressure regulator of commercial vehicle is submitted to study in this paper. Its structure and operating principle are introduced, and a simulation model based on the AMESim is established on the basis of its mathematical model. Then the static characteristics and dynamic characteristics are researched by simulation model and the characteristic curves are compared with experimental data for the verification. The results show that simulation curves and experiment curves are in good agreement, which can be tolerated in the engineering.

Lubrication Analysis of a Rolling Piston Rotary Compressor: Part 2: Experimental Validation and Results

1994 ◽  
Vol 208 (2) ◽  
pp. 95-104
Author(s):  
S K Padhy
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Experimental Validation ◽  
Sensitivity Study ◽  
Rotary Compressor ◽  
Oil Flow ◽  
Different Dimensions ◽  
Rolling Piston ◽  
The Mathematical Model ◽  
Good Agreement

In this paper the experiments conducted for the measurement of oil flow in the rotary compressor are described. The experimental data are compared against the theoretical prediction from the mathematical model developed (1) and a good agreement is found. In addition, experimental data from previously published literature are also used to verify the mathematical model. A sensitivity study is carried out to predict the behaviour of the rotary compressor for the oil flow at different conditions and with different dimensions.

scholarly journals Mathematical Analysis of the Reduction of Wüstite at Different Basicity Using Factorial Design

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
E. A. Mousa
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Blast Furnace ◽  
Regression Model ◽  
Factorial Design ◽  
Mathematical Analysis ◽  
Gas Mixture ◽  
Reduction Degree ◽  
Matlab Program ◽  
Good Agreement

Numerical prediction is performed on the reduction of wüstite under simulated blast furnace conditions using factorial design approach. Wüstite sinter samples with different basicity (0.5, 1.0, and 2.0) are reduced with a gas mixture consisting of 30% CO, 10% H2, 5% CO2, and 55% N2 at 950–1100°C. In all cases, the reduction degree of wüstite increased with basicity and temperature. A 23 factorial design is applied to derive a regression model based on the experimental data of acidic (CaO/SiO2 = 0.5) and basic (CaO/SiO2 = 2.0) wüstite which is reduced at 950°C and 1100°C for 5 and 35 min. The developed mathematical model is applied to predict the reduction degree of wüstite at different basicity (0.5, 1.0, and 2.0), interval of time (5–35 min), and temperatures (950, 1000, 1050°C, and 1100°C). In general, the results of the driven models are found to be in good agreement with the experimental data of reduction of wüstite in many cases. The MATLAB program is used to carry out the required calculations.

Dynamics Analytical Model of Cutting Force in Metal Cutting Processing

2011 ◽  
Vol 308-310 ◽  
pp. 1211-1214
Author(s):  
Jian Ying Guo ◽  
Wen Bin Li ◽  
Shi Ying Wang ◽  
Ming Lv
Keyword(s):  
Experimental Data ◽  
Cutting Force ◽  
Analytical Model ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Static Balance ◽  
Impact Effect ◽  
New Formula ◽  
Suggested Formula ◽  
Good Agreement

Cutting force is an important parameter in machining. The static balance method and experience formulas had been adopted to find its value, but the theoretical calculated value is not good agreement with the experimental value for the same set of cutting conditions. In practical machining, the cutting tool has obvious impact effect on workpiece, so a dynamics analytical model for cutting process is established in this paper. Based on the proposed solution, a new formula for cutting force has been obtained. The suggested formula has shown to correspond well with the experimental data.

scholarly journals Mathematical Model of VOCs Emission in Three-layer Building Materials

2021 ◽  
Vol 257 ◽  
pp. 03047
Author(s):  
Zhehua Du ◽  
Xin Lin
Keyword(s):  
Experimental Data ◽  
Boundary Layer ◽  
Mathematical Model ◽  
Building Materials ◽  
Present Model ◽  
Transfer Resistance ◽  
Model Predictions ◽  
Layer Resistance ◽  
Boundary Layer Resistance ◽  
Good Agreement

A simple mathematical model is proposed to account for emissions of Volatile Organic Compounds (VOCs) from three-layer building materials. The model considers both the diffusion within three layer building materials and the mass transfer resistance through the air boundary layer. A general solution method based on Laplace transform is presented. Compared to other models capable of accounting for emissions of VOCs from multi layer building materials, the present model is fully analytical instead of being numerical. The present model was validated by the experimental data from the specially designed test. The results indicated that there was a good agreement between the model predictions and the experimental data. It can also be seen from calculation that model ignoring the boundary layer resistance cannot fully reflect the real situation.

scholarly journals Combustion of a frozen bi-dispersed aluminum-water suspension

2018 ◽  
Vol 243 ◽  
pp. 00023 ◽  
Author(s):  
Vasiliy Poryazov ◽  
Aleksey Krainov
Keyword(s):  
Experimental Data ◽  
Water Vapor ◽  
Scientific Literature ◽  
Combustion Products ◽  
Combustion Model ◽  
Mass Ratio ◽  
Aluminum Particles ◽  
Water Suspension ◽  
Dispersed Aluminum ◽  
Good Agreement

This paper presents a combustion model of nano- and microsized aluminum mixture frozen in water. The model takes into account combustion of aluminum particles in water vapor, the motion of combustion products, the temperature and velocity differences between particles and gas. The obtained results of the combustion rate depending on pressure and mass ratio between dispersed Al powders are in good agreement with the experimental data described in scientific literature.

A Mathematical Model For Steady Operation of Stirling-Type Engines

1968 ◽  
Vol 90 (1) ◽  
pp. 45-50 ◽  
Author(s):  
E. B. Qvale ◽  
J. L. Smith
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Mathematical Model ◽  
Heat Exchangers ◽  
Correction Factors ◽  
Transfer Rates ◽  
Flow Friction ◽  
Independent Variables ◽  
Basic Performance ◽  
Good Agreement

A mathematical model of Stirling-type engines has been developed. The complexity of the problem has been reduced by analyzing the various components of the engine (heat exchangers, regenerator, and cylinders) separately for cyclically steady conditions, and by selecting pressure, temperature, and mass as the independent variables. The required piston displacements are a computed result. Losses due to flow friction, piston blow-by, and finite heat transfer rates have been accounted for by applying correction factors to the basic performance which is computed without these effects. The theory has been carried out for engines, but it is equally valid for refrigerators with minor modification. The theory is in good agreement with available experimental data.

Mathematical Modeling of Process of Obtaining the Solid Uranium Hexafluoride

2016 ◽  
Vol 683 ◽  
pp. 533-539 ◽  
Author(s):  
Aleksey A. Orlov ◽  
Alexandr F. Tsimbalyuk ◽  
Roman V. Malyugin
Keyword(s):  
Mathematical Modeling ◽  
Experimental Data ◽  
Mathematical Model ◽  
Temperature Distribution ◽  
Solid Phase ◽  
Uranium Hexafluoride ◽  
Tank Wall ◽  
Layer Filling ◽  
Gaseous Uranium ◽  
Good Agreement

A non-stationary mathematical model of desublimation UF6 in vertical tanks considers the movement of gaseous uranium hexafluoride contains in the article. Results of calculation of time dependence of the linear velocity desublimation, the thickness of the resulting layer of the solid phase, the temperature distribution in the tank wall - desublimation layer, filling dynamics of vertical tank B-12 by solid UF6 are presented. Calculations have shown that the 70% of B-12 tank is filled desublimation UF6 by 250 hours, which is in good agreement with the experimental data

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