Comparison of a fast calculation method for thermal-group constants, employed in the programme SATAN, with THERMOS-like calculations and experimental data

1967 ◽  
pp. 81-82
Author(s):  
Rudi J. J. Stamm'ler ◽  
Aldert Tas
Keyword(s):  
Experimental Data ◽  
Calculation Method ◽  
Fast Calculation

scholarly journals Proton impact ionization and a fast calculation method

2013 ◽  
Vol 118 (8) ◽  
pp. 5369-5378 ◽  
Author(s):  
Xiaohua Fang ◽  
Dirk Lummerzheim ◽  
Charles H. Jackman
Keyword(s):  
Calculation Method ◽  
Impact Ionization ◽  
Fast Calculation ◽  
Proton Impact

scholarly journals AN INNOVATE METHOD OF THERMOGRAVIMETRIC DATA ANALYSIS

2021 ◽  
Vol 64 (3) ◽  
pp. 24-32
Author(s):  
Mihail V. Mal’ko ◽  
Sergej V. Vasilevich ◽  
Andrey V. Mitrofanov ◽  
Vadim E. Mizonov
Keyword(s):  
Experimental Data ◽  
Thermal Decomposition ◽  
Thermogravimetric Analysis ◽  
Kinetic Parameters ◽  
Calculation Method ◽  
Kinetic Calculation ◽  
Pyrolysis Mechanism ◽  
Total Mass Loss ◽  
Thermogravimetric Data ◽  
Heavy Tar

The objective of the study is to examine the Coats-Redfern approximation and to propose an innovative kinetic calculation method for the complex process of the heavy tar thermal decomposition under non-isothermal process. The thermal decomposition process was examined using the thermogravimetric analysis. There are several kinetic models proposed to analyze pyrolysis mechanism in terms of the formal reaction. In this manner, the kinetic parameters of the pyrolysis process can be evaluated based on total mass loss (thermogravimetric analysis –TGA). The TGA procedures can be conducted with isothermal or non-isothermal conditions, but the experimental data obtained according to this procedure have to be transformed into appropriate correlation. The obtained results have shown that the reaction takes place within temperature range of 540 K to 700 K and the inductive period of the process is about 224 min. Kinetic parameters were estimated with using of the conventional Coats-Redfern method. A new kinetic calculation method has been designed to provide a less laboriousness of identifications procedures compared with Coats-Redfern approximation and to take into account an induction time of the process. As the outcome of this study, it was shown that the kinetic parameters estimated with using of the proposed model-fitted method gives the more appropriate correlation in comparison with the conventional Coats-Redfern method. The proposed method uses the Coats-Redfern algorithm for evaluation of the reaction mechanism, but the value of the constant rate is defined directly from experimental data on the conversion rate.

scholarly journals A Fast Calculation Method for Improving the Steering Arm of Mining Trucks with Macpherson Suspension

2021 ◽  
Vol 11 (18) ◽  
pp. 8614
Author(s):  
Jianwei Wu ◽  
Qidi Fu ◽  
Jianrun Zhang ◽  
Beibei Sun
Keyword(s):  
Calculation Method ◽  
Rolling Resistance ◽  
Economic Cost ◽  
Coupling Model ◽  
Resistance Coefficient ◽  
Extreme Conditions ◽  
Fast Calculation ◽  
Vehicle Velocity ◽  
Steering Mechanism ◽  
Improvement Scheme

The steering arm has recently been frequently broken in a kind of mining truck with Macpherson suspension. To accelerate replacing the broken parts and minimize the economic cost, a fast calculation method for improving the steering arm is proposed in this paper. In this method, the forces on the steering arm are calculated by quasi-static analysis under a low vehicle velocity. Dynamic characteristics of the tire and road are partly included by considering the ranges of the rolling resistance coefficient and friction coefficient from the empirical values, which determines the torque on the steering arm under extreme conditions. The rigid–flexible coupling model for the left steering mechanism in ANSYS Workbench is established and solved to obtain the distribution stress on the steering arm under extreme conditions. Then, the reliability of the simulation results based on this fast calculation method is verified by the experiment. After determining an improvement scheme considering the economic and time cost, the satisfactory strength is obtained. The results illustrate that the strength of the improved steering arm has nearly doubled. Finally, the effectiveness of the improved steering arm is demonstrated by the users’ feedback after it is manufactured, installed, and used.

A Calculation Method to Investigate the Effects of Geometric Parameters and Operational Conditions on the Static Characteristics of Aerostatic Spherical Bearings

2018 ◽  
Vol 141 (2) ◽  
Author(s):  
Hailong Cui ◽  
Huan Xia ◽  
Dajiang Lei ◽  
Xinjiang Zhang ◽  
Zhengyi Jiang
Keyword(s):  
Experimental Data ◽  
Calculation Method ◽  
Reynolds Equation ◽  
Geometric Parameters ◽  
Static Characteristics ◽  
Optimal Parameters ◽  
Film Pressure ◽  
Operational Conditions ◽  
Pressure Distributions ◽  
Calculation Results

In this paper, a calculation method based on matlab partial differential equations (PDE) tool is proposed to investigate the static characteristics of aerostatic spherical bearings. The Reynolds equation of aerostatic spherical bearings is transformed into a standard elliptic equation. The effects of geometric parameters and operational conditions on the film pressure, bearing film force, and stiffness are studied. The axial and radial eccentricities result in different film pressure distributions; the bearing film force and stiffness are significantly influenced by geometric parameters and operational conditions. The relative optimal parameters are confirmed based on the calculation results. A comparison between the numerical and experimental results is also presented. The highest relative error between the numerical results and the experimental data is 11.3%; the calculation results show good agreements with the experimental data, thus verifying the accuracy of the calculation method used in this paper.

Fast Calculation Method for Low Dynamic Carrier Velocity Based on Improved Harris

2018 ◽  
Vol 38 (4) ◽  
pp. 0415001
Author(s):  
方文辉 Fang Wenhui ◽  
陈熙源 Chen Xiyuan ◽  
柳笛 Liu Di
Keyword(s):  
Calculation Method ◽  
Fast Calculation ◽  
Carrier Velocity

scholarly journals Fast Calculation Method of UCAV Maneuver Flight Control Based on RBF Network

2018 ◽  
Vol 1087 ◽  
pp. 022027
Author(s):  
Jie Wang ◽  
Dali Ding ◽  
Bo Han ◽  
Cong Li ◽  
Shuo Ku
Keyword(s):  
Flight Control ◽  
Calculation Method ◽  
Fast Calculation ◽  
Rbf Network

Fast calculation method for computer-generated cylindrical holograms

2008 ◽  
Vol 47 (19) ◽  
pp. D63 ◽  
Author(s):  
Takeshi Yamaguchi ◽  
Tomohiko Fujii ◽  
Hiroshi Yoshikawa
Keyword(s):  
Calculation Method ◽  
Fast Calculation
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