Transient Thermal Analysis of Spin-Flash Dryer Agitating Blade

2013 ◽  
Vol 716 ◽  
pp. 643-647 ◽  
Author(s):  
Yong Sheng Deng ◽  
Tao Zhou ◽  
Yong Sheng Zhou ◽  
Xiang Lei Ji
Keyword(s):  
Mechanical Properties ◽  
Thermal Analysis ◽  
Thermal Stress ◽  
High Temperature ◽  
Influencing Factors ◽  
Thermal Deformation ◽  
Working Condition ◽  
Thermal Structure ◽  
Coupling Field ◽  
Transient Thermal

The working condition of the spin-flash dryer agitating blade is complex, and influencing factors of the blade strength are quite more. In order to research its mechanical properties under the condition of transient high temperature, the analysis of thermal structure coupling field was performed. By the analysis of thermal stress and thermal deformation, the agitating blade would be designed well.

scholarly journals Research on Discrete Data Analysis of Vehicle Retread Tire Performance Based on Radial Stiffness Method

2021 ◽  
Vol 2074 (1) ◽  
pp. 012035
Author(s):  
Peng Qi ◽  
Jiangwei Chu
Keyword(s):  
Numerical Simulation ◽  
Thermal Analysis ◽  
Thermal Stress ◽  
Steady State ◽  
Thermal Structure ◽  
Analysis Model ◽  
Coupling Field ◽  
Radial Stiffness ◽  
Simulation Calculation ◽  
Stiffness Method

Abstract The retreaded tires of transportation vehicles often cause delamination and tearing of the tread and carcass due to the temperature rise of the tires. For the failure analysis and rational use of the retreaded tires, a steady-state thermal analysis model of the retreaded radial tires in the rolling state is established and carried out the temperature measurement test. On this basis, the numerical simulation, simulation calculation and experimental analysis of the thermal-structure coupling field are carried out, which truly reflects the thermal stress status of the retreaded tire.

Experimental Study on the Influence of Temperature on Shale Mechanical Properties under Conventional Triaxial Compression

2011 ◽  
Vol 250-253 ◽  
pp. 1452-1455 ◽  
Author(s):  
Lu Bo Meng ◽  
Tian Bin Li ◽  
Liang Wen Jiang ◽  
Hong Min Ma
Keyword(s):  
Mechanical Properties ◽  
Thermal Stress ◽  
Elastic Modulus ◽  
High Temperature ◽  
Poisson’S Ratio ◽  
Triaxial Compression ◽  
Poisson's Ratio ◽  
Influence Of Temperature ◽  
Conventional Triaxial Compression ◽  
Influence Of Temperature On

High temperature conventional triaxial compression test of shale are carried out by the MTS815 servo-controlled testing machine, based on the experimental results, the relationships between temperature and shale peak strength, elastic modulus, Poisson's ratio, cohesion, internal friction angle are investigated. Although the experimental results are discrete comparatively, the general law is obvious. When the confining pressure imposed on shale is constant and the temperature changes form 25°C to 120°C, with the increasing of the temperature, the triaxial compression strength, shear strength gradually increase, while average elastic modulus, Poisson's ratio has a slightly decrease. The thermal stress generated by the high temperature plays a role to accommodate the deformation and the function of preventing crack propagation, thus the bearing capacity of shale samples are strengthened. But the influence of temperature on shale mechanical properties mutates when the temperature is at 80°C. Shale peak strength dramatically decreased, average elastic modulus decreased slightly, and Poisson's ratio also increased slightly, which indicated that at 80°C, different thermal expansivity of mineral particles of shale may cause cross-grain boundary thermal expansion incongruous, creating additional thermal stress, thus the sample’s bearing capacity decreased.

Combustion Synthesis of Alumina-Based Multiphase Foam Ceramic

2008 ◽  
Vol 368-372 ◽  
pp. 1526-1528 ◽  
Author(s):  
Jun Shou Li ◽  
Liang Li ◽  
Jian Jiang Wang ◽  
Bing She Xu ◽  
Yu Jun Yin
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Combustion Synthesis ◽  
Influencing Factors ◽  
Direct Observation ◽  
Compression Strength ◽  
Pore Diameter ◽  
Foaming Agent ◽  
Temperature Resistance ◽  
Foam Ceramic

Al2O3-TiO-TiO2 multiphase foam ceramic was prepared with Al powders and TiO2 powders by combustion synthesis, Direct observation and metallographic microscope indicated that the pore diameter is 100~6000μm, and Archimedean method showed that the porosity is 35~50%. The influencing factors of the pore diameter and porosity and, the effects of adding SiO2 on compression strength of the Al2O3- TiO-TiO2 multiphase foam ceramic were discussed. It was shown that the addition of proper high temperature foaming agent can increase porosity and adding SiO2 can decrease porosity. The Al2O3-TiO-TiO2 multiphase foam ceramic has good mechanical properties and high-temperature resistance.

Supporting Structure Performances Analysis of Heavy-Duty Gas Turbine Based on Fluid-Solid Coupling Method

2015 ◽  
Author(s):  
Guohui Xu ◽  
Jian Zhou ◽  
Mingjian Lu ◽  
Haipeng Geng ◽  
Yanhua Sun ◽  
...  
Keyword(s):  
Thermal Stress ◽  
High Temperature ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Thermal Deformation ◽  
Coupled Model ◽  
Strength Analysis ◽  
Cooling Flow ◽  
Heavy Duty Gas Turbine ◽  
Steady State Heat Transfer

In order to achieve high working efficiency, modern gas turbines operate at high temperature which is close to the melting points of metal alloys. However, the support of turbine end suffers the thermal deformation. And the journal center position is also changed due to the effects of high temperature and shaft gravity. Tangential or radial supporting structures, which are composed of supporting struts, diffuser cones, hot and cooling fluid channel, are widely used in gas turbine hot end. Cooling technology is usually used to keep the bearing temperature in a reasonable range to meet requirements of strength and deformation of the supporting struts. In this paper, three major assumptions are proposed: (a) radiation is not considered, (b) cooling flow system is only partially modeled and analysis assumes significantly higher cooling flow that is not typical for current engines, and (c) only steady state heat transfer is considered. And a 3D fluid-solid coupled model based on finite-element method (FEM) is built to analyze the performances of both the tangential and the radial support. The temperature distribution, thermal deformation and stress of supports are obtained from CFD and strength analysis. The results show that either the tangential or radial support is used in a 270MW gas turbine; the thermal stress is about 90.3% of total stress which is produced by both thermal effects and shaft gravity. Comparing to the results from radial supports, it can be seen that the struts stress and position variation of journal center of tangential support are smaller. Due to a rotational effect of the bearing housing caused by the deformation of the tangential struts, the thermal stress in these tangential struts can be relieved to some extent. When both thermal effect and shaft gravity are considered, the stress of each tangential supporting strut is almost uniformly distributed, which is beneficial to the stability of rotor system in the gas turbine.

scholarly journals Design and Analysis of a Ceramic Stator Vane

1975 ◽  
Author(s):  
S. C. Sanday ◽  
T. L. Lam ◽  
T. J. Rahaim
Keyword(s):  
Finite Element ◽  
Thermal Stress ◽  
High Temperature ◽  
Three Dimensional ◽  
Finite Element Code ◽  
Isoparametric Finite Element ◽  
Stator Vane ◽  
Transient Thermal ◽  
Industrial Gas Turbine ◽  
Temperature Time

The development of a ceramic stator vane for the first stage of a high temperature industrial gas turbine is presented. The elastic transient thermal stress analysis of the latest design, using a three-dimensional isoparametric finite element code is outlined. Results for a vane assembly made of silicon nitride and exposed to several temperature-time conditions are discussed.

High-Temperature Transient Thermal Analysis for SiC Power Modules

2016 ◽  
Vol 858 ◽  
pp. 1078-1081 ◽  
Author(s):  
Fumiki Kato ◽  
Hiroshi Nakagawa ◽  
Hiroshi Yamaguchi ◽  
Hiroshi Sato
Keyword(s):  
Thermal Analysis ◽  
Heat Capacity ◽  
High Temperature ◽  
Thermal Resistance ◽  
Junction Temperature ◽  
Stable Operation ◽  
Transient Thermal Analysis ◽  
Die Attach ◽  
Power Modules ◽  
Transient Thermal

Transient thermal analysis is a very useful tool for thermal evaluation to realize the stable operation of SiC power modules which are operated at higher temperatures than conventional Si power modules. A transient thermal analysis system to investigate the thermal characteristics of SiC power modules at high temperature is presented. We have found that precise temperature measurement at the initial stage of the junction temperature decay curve is necessary in order to evaluate the thermal resistance and heat capacity of the die attach, since the thermal diffusivity of SiC is larger than that of Si and the temperature distribution of SiC die was considered. Using the proposed transient thermal analysis method, the thermal resistance and heat capacity of the AuGe die attach under the SiC-SBD was successfully evaluated at temperatures up to 250 °C.

Thermodynamics Coupling Analysis of Grid-Controlled Electron Gun

2013 ◽  
Vol 423-426 ◽  
pp. 1433-1437 ◽  
Author(s):  
Fang Fang Song ◽  
Sha Xu ◽  
Yun Fei En
Keyword(s):  
Thermal Stress ◽  
High Temperature ◽  
Stress Analysis ◽  
Thermal Deformation ◽  
Electron Gun ◽  
Design Parameters ◽  
Axial Distance ◽  
Thermal Stress Analysis ◽  
Steady State Temperature ◽  
Cathode Temperature

This paper carried out temperature analysis in the working state of the electron gun structure, the thermal deformation under high temperature and thermal stress analysis. Firstly, from the steady state temperature cloud chart of the electron gun we can see the cathode temperature is 985 °C, shadow grid temperature is same as cathode temperature, and the controlled-grid temperature is as high as 540 °C. Secondly, on the basis of thermal analysis, the coupled thermo-mechanical simulation technology is broken through; further thermal stress and thermal deformation at high temperature are analyzed. Thermal stress analysis results show that the maximum stress point is at contact area of cathode and its supporting tube. And the thermal deformation result shows that at high temperature under the action of thermal deformation, the axial distance of cathode-grid distance reduced 0.078 mm. Based on thermal deformation, the development personnel of microwave tube can use simulator to analysis the influence of thermal deformation to the electron gun design parameters, which can provide theoretical basis for tube design.

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