scholarly journals Simulation of induction heating technology for the production of seamless large diameter tees

2018 ◽  
Vol 245 ◽  
pp. 04002
Author(s):  
Iurii Murashov ◽  
Vyacheslav Shestakov ◽  
Vladimir Skornyakov ◽  
Irina Savelieva
Keyword(s):  
Mathematical Model ◽  
Induction Heating ◽  
Cooling System ◽  
Large Diameter ◽  
Experimental Studies ◽  
Spiral Inductor ◽  
Heating Process ◽  
Operating Modes ◽  
Flat Spiral ◽  
Heating Technology

The article is dedicated to nonstationary simulation of induction heating technology for the production of seamless large diameter tees. A mathematical model of induction heating process representing a multi-physical (heat transfer and electromagnetism) task for technology of tees production is developed. Numerical simulation was carried out for a flat spiral inductor. The developed model was verified according to the results of experimental studies. The hydrodynamic 3D mathematical model is developed for the design of the inductor cooling system. Optimal operating modes are determined by simulation results and confirmed by experimental data. The calculation results are presented for pipes with wall thicknesses: 15 mm, 40 mm, 60 mm, 70 mm.

scholarly journals Parameter Optimization and Prediction Model of Induction Heating for Large-Diameter Pipe

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Xiurong Fang ◽  
Jia Lu ◽  
Junfeng Wang ◽  
Jinhui Yang
Keyword(s):  
Prediction Model ◽  
Induction Heating ◽  
Process Parameters ◽  
Pipeline Steel ◽  
Large Diameter ◽  
Outer Wall ◽  
Design Parameters ◽  
Heating Process ◽  
Influence Of Process Parameters ◽  
Heating Device

The parameters of induction heating of large-diameter pipes have a direct effect on the final processing quality of the elbow, and the complexity of multifield coupling of magnetothermal force in induction heating can make it impossible to quantitatively optimize the design parameters of the induction heating device. In this paper, X80 pipeline steel induction heating is taken as the research object, and a corresponding numerical model is established. The influence of induction heating process parameters on the heating temperature of pipeline steel under the skin effect is determined. First, the influence of process parameters on the heating effect of pipeline steel is quantified by orthogonal test. Then, taking the optimum temperature difference between the inner and outer wall of X80 pipeline steel during the induction heating process as a target, the optimal process parameter set of the pipe induction heating is determined by using neural network genetic algorithm. Finally, comparing the relevant test criteria of the regression equation, the optimum mathematical prediction model of the outer wall temperature of the pipe induction heating process is obtained, which provides a theoretical basis for optimization of the process parameters of the pipe-based induction heating device.

Finite element analysis and experiment on induction heating process of slab continuous casting-direct rolling

2019 ◽  
Vol 116 (4) ◽  
pp. 403
Author(s):  
Chao Yu ◽  
Hong Xiao ◽  
Zi-chen Qi ◽  
Yun-peng Zhao
Keyword(s):  
Finite Element ◽  
Continuous Casting ◽  
Induction Heating ◽  
Heating Process ◽  
Element Analysis ◽  
Actual Production ◽  
Heating Surfaces ◽  
Direct Rolling ◽  
Heating Technology ◽  
Moving Speed

To reduce the energy consumption of reheating billets between the continuous casting and hot rolling processes, the continuous casting-direct rolling (CC-DR) process is developed, of which one of the key technologies in CC-DR is compensative heating between the processes. Considering the compensative heating technology requirements in the actual production of slab CC-DR, the finite element models of longitudinal flux induction heating (LFIH) and transverse flux induction heating (TFIH) are established to analyse the slab heating process. The results show that LFIH is good for heating surfaces of the slab, but cannot solve the problem of low temperature on the edges, which can effectively be heated with TFIH. The temperature distribution of the slab can be made more uniform by choosing the appropriate current and moving speed. Besides, induction-heating prototypes are developed to inspect the effect of induction heating. The measured results are consistent with the simulated ones. The results of the analysis have direct significance on the induction heating process in the actual production of slab CC-DRs.

scholarly journals EXPERIMENTAL STUDIES OF HEAT EXCHANGE DURING WATER COOLING AND STEAM CONDENSATION IN DEMOVER RADIATOR SECTIONS

2021 ◽  
Vol 1 (38) ◽  
pp. 107-114
Author(s):  
V. Mogila ◽  
M. Kovtanets ◽  
M. Morneva
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Mathematical Model ◽  
Cooling System ◽  
Experimental Studies ◽  
Road Transport ◽  
Thermal Calculation ◽  
Mode Of Operation ◽  
Simulation Results ◽  
The Mathematical Model

The Department of Railwayand Road Transport, lift and care system of Volodymyr Dahl East Ukrainian National University, an energy-saving cooling system for diesel locomotives using phase transitions of the coolant has been developed. The proposed cooling system allows to maintain constant optimal temperatures of cooling objects at ambient temperatures ± 40 ºC and in any mode of operation of the diesel engine. For thermal calculation of the radiator section operating in the mode of the steam condenser, the mathematical model of process of heat transfer from steam to walls of a flat tube at condensation is developed that considers geometrical features of section of a tube. The adequacy of this mathematical model is verified by comparing the simulation results with the obtained experimental data. During the tests, the outlet water temperature, inlet and outlet air temperature, and air pressure in front of and behind the radiator were measured. Having the values of wall temperature, steam temperature and condensate, knowing the value of steam consumption and the experimental heat transfer coefficient, it becomes possible to verify the adequacy of the mathematical model by comparing the simulation results with the obtained experimental data. Schemes of bench equipment, test methods, experimental planning and basic calculation dependences required for testing serial radiator sections of a locomotive in the standard mode of operation and in the mode of steam condensers are presented.

scholarly journals Heat Curing Performance of Cold-Weather Concrete using Induction Heating Technology

2020 ◽  
Vol 20 (6) ◽  
pp. 23-30
Author(s):  
Jinbok Lee ◽  
Kyeongtack Kim ◽  
Jinsoo Choi ◽  
Chi-Hyung Ahn ◽  
Hyun-Oh Shin
Keyword(s):  
Cross Section ◽  
Induction Heating ◽  
Electromagnetic Compatibility ◽  
Cold Weather ◽  
Magnetic Flux Density ◽  
Heating Process ◽  
Test Results ◽  
Concrete Mixtures ◽  
Heat Curing ◽  
Heating Technology

In this study, we evaluated the heat curing performance of cold-weather concrete using the induction heating technology. Specifically, we studied the effects of the size and shape of steel forms as well as different concrete mixtures on the heat curing performance. The test results showed that increasing the cross-section of concrete reduced the homogeneity of temperature distribution throughout it. This problem can be compensated for by adding more conductive materials in the concrete cross-section. The concrete specimens that were cured using induction heating achieved a satisfactory early age strength even though they were stored in a 0 °C low-temperature chamber. Furthermore, we evaluated the electromagnetic compatibility (EMC) of the induction heating process and the magnetic flux density of 13.9 µT thus obtained satisfied the EMC requirement.

Improving Plastic Thermoform Quality with Uniform Heating Technology

2010 ◽  
Vol 97-101 ◽  
pp. 204-208
Author(s):  
Zhi Guo Zhang ◽  
Chen Lin ◽  
Da Kui Feng ◽  
Ray Still
Keyword(s):  
Surface Temperature ◽  
Experimental Studies ◽  
Electric Heater ◽  
Heating Process ◽  
Heating Cycle ◽  
Transient Heating ◽  
Ir Camera ◽  
Heating Efficiency ◽  
Pros And Cons ◽  
Heating Technology

The experimental studies were conducted to study the plastic thermoforming heating process. The heaters performance has been evaluated from two different ways: heating water calorimeter for heating efficiency and heating plastics for thermoform processes. The studies of the heaters include gas-fired heater and electric heater. Transient heating processes of plastics were also studied to investigate the heater’s performance on plastics. The surface temperature of plastic at the end of heating process was measured by IR camera. The heating cycle time, surface temperature uniformity of plastic and energy consumed for the heating cycle by different heaters were discussed. The pros and cons of different heaters for plastic heating process were also discussed in this paper.

Numerical analysis and experimental research of triangle induction heating of the rolled plate

2016 ◽  
Vol 231 (5) ◽  
pp. 844-859 ◽  
Author(s):  
Xuebiao Zhang ◽  
Cheng Chen ◽  
Yujun Liu
Keyword(s):  
Numerical Model ◽  
Induction Heating ◽  
Electromagnetic Coupling ◽  
Element Model ◽  
Rolled Plate ◽  
Heating Process ◽  
Forming Process ◽  
Plate Edge ◽  
Modified Model ◽  
Heating Technology

In shipyard, triangle heating technology with irregular multi-heating paths and highly concentrated heat input is used to form a curved plate, especially a concave type plate. Compared with line heating process with simple line segment path, its main purpose is to get a bigger contraction deformation at the plate edge. Hence, triangle heating technology is important for most shipyards to increase hull-forming productivity and study the automation. This paper focuses on the moveable triangle induction heating technology. An electromagnetic coupling finite element model is built to simulate the moveable triangle induction heating process and reveal the temperature characteristics and deformation behavior. The results of the simulation are compared with those obtained from experiments and show good agreement. It demonstrates that the numerical model used in this study is effective for simulating triangle heating for the steel plate forming process in shipbuilding. With the numerical model, the paper further investigates the effect of heating parameters on temperature and shrinkage deformation. These are traced here with a modified mechanical model whose results are in accord with the numerical results. This modified model can be applied to predict the edge shrinkage and explain the effect of heating parameters on transverse shrinkage.

scholarly journals APPLICATION OF WATER-AIR COOLING TECHNOLOGIES FOR HEAT TREATMENT OF BEARING RINGS

2018 ◽  
Vol 61 (6) ◽  
pp. 423-430 ◽  
Author(s):  
Yu. G. Yaroshenko ◽  
Yu. I. Lipunov ◽  
A. B. Smakhanov ◽  
M. V. Stolyarova
Keyword(s):  
Mathematical Model ◽  
Cooling System ◽  
Structural Characteristics ◽  
Experimental Studies ◽  
Air Cooling ◽  
Original Design ◽  
Air Jets ◽  
Wide Range ◽  
Bearing Rings ◽  
The Mathematical Model

The paper presents the results of mathematical modeling and  experimental researches executed during the development of the  techno logy of differential water-air cooling of bearing rings made  of 52100 (EN1.3505) steel produced by JSC “Vologda Bearing  Plant”. Overlapping the mathematical model of temperature variation curves across the bearing cross-section on the thermokinetic  diagram of the decomposition of supercooled austenite calculated  according to the mathematical model developed by JSC VNIIMT  has shown that a required microstructure of the heat-treated metal is  achieved in a wide range of differentiated water-air cooling modes.  Experimental studies of heat-strengthening of bearing rings by water-air jets were carried out on a specially assembled experimental  industrial device with a cooling system equipped with mixers and  collectors with flat-jet nozzles of the original design that ensure the  stability of the torch and the uniformity of spraying the water-air  mixture over a wide range of flow rates and water and air pressure.  The thermal hardening of the rings carried out at various cooling  regimes, followed by the determination of the mechanical properties and structural characteristics of the steel, has confirmed that the  water-air cooling technology achieves the required structural and  mechanical characteristics of the bearing rings and is a competitive,  environmentally friendly alternative to the technology of volume  quenching in oil tank.

The Numerical Study of Steel Plate Forming by Moveable Induction Heating Considering the Plate Edge Shrinkage

2017 ◽  
Vol 33 (02) ◽  
pp. 166-177
Author(s):  
Xuebiao Zhang ◽  
Cheng Chen ◽  
Jiaqin Li ◽  
Yujun Liu
Keyword(s):  
Induction Heating ◽  
Steel Plate ◽  
Numerical Study ◽  
Electromagnetic Coupling ◽  
Element Model ◽  
Heating Process ◽  
Plate Edge ◽  
Forming Technology ◽  
Heating Technology ◽  
Transverse Shrinkage

In this article, the line heating forming technology by using the moveable induction heating is used to form a concave-type plate. In shipyard, it is necessary to get a bigger contraction deformation at the plate edge for the concave plate. However, the heat input of the metal near the plate edge is less than that of the internal metal along the heating line due to the decrease of heat power near the plate edge, thus causing smaller transverse shrinkage of the plate edge. To solve this problem, the paper investigates the suitable heating way of the inductor for the concave plate forming. An electromagnetic coupling finite element model is built to simulate the moveable induction heating process and reveal different heating and forming characteristic of different inductor heating ways. The simulation results are verified by experiments data. Research results showed that the heating way by which the inductor moves out of plate edge is an effective heating technology which meets the forming requirement of the concave plate.

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