Numerical Simulation of Parts Quenching Deformation

2014 ◽  
Vol 698 ◽  
pp. 487-490
Author(s):  
Ivan Osipov ◽  
Alexandr Bachurin ◽  
Nikolay Kurlayev
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Thermal Deformation ◽  
Unsteady Heat Transfer ◽  
Quench Medium ◽  
The Difference

The problem of unsteady heat transfer of a part with the quench medium and thermal deformation of aluminum alloy parts is discussed and the results of calculating are compared to the experimental data. The experimental data confirmed the nature of the deformation obtained by numerical simulation. The difference between the deformations obtained in the calculations and the experimental data was 23%.

scholarly journals HEAT EXCHANGE OF ELECTRIC CONDUCTIVE LIQUID IN THE SUPPLY OF HEAT TO THE INNER SURFACE OF THE SPHERICAL LAYER AT SMALL VALUES OF THE REYNOLD'S MAGNETIC NUMBER

2021 ◽  
pp. 35-42
Author(s):  
С.В. Соловьев
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Spherical Layer ◽  
Magnetic Reynolds Number ◽  
Joule Dissipation ◽  
Unsteady Heat Transfer ◽  
Electrically Conductive ◽  
Conductive Liquid ◽  
Nusselt Numbers ◽  
Inner Surface

Представлены результаты численного моделирования нестационарного теплообмена и магнитной гидродинамики электропроводной жидкости в сферическом слое. Исследовано влияние малых значений магнитного числа Рейнольдса и теплоты джоулевой диссипации на эволюцию структуры течения жидкости, поле температуры, магнитной индукции и распределение чисел Нуссельта. The results of numerical simulation of unsteady heat transfer and magneto hydrodynamics of an electrically conductive fluid in a spherical layer are presented. The influence of small values of the magnetic Reynolds number and the heat of Joule dissipation on the evolution of the structure of the fluid flow, the field of temperature, magnetic induction and the distribution of Nusselt numbers is investigated.

Numerical Simulation for Peripheral Milling of Aero-Aluminum Alloy Based on 3D FE Model

2013 ◽  
Vol 589-590 ◽  
pp. 3-7
Author(s):  
Kui Hu Cui ◽  
Cheng Zu Ren ◽  
Guang Chen
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Simulation Model ◽  
Depth Of Cut ◽  
Fe Model ◽  
Peripheral Milling ◽  
Side Edge ◽  
Simulation Results ◽  
Aluminum Alloy 7075

In this paper, an advanced 3D FE model was established using ABAQUS Explicit to simulate the process of milling aluminum-alloy 7075-T7451. Taking the end edge and the side edge of single flute into consideration, the model simulated the interaction between the spiral flute and wokpiece at full depth of cut. In addition, by defining automatic element deletion criterion and locally refining mesh, this model realized chip separating from workpiece without defining of cutting layer. The simulation results were compared with experimental data to verify the correctness of the simulation model.

A method for thermal characteristics modelling of hob assembly on dry hobbing machine

2018 ◽  
Vol 233 (7) ◽  
pp. 2262-2274
Author(s):  
Zhitao Liu ◽  
Qian Tang ◽  
Xianguang Li ◽  
Zheng Zou ◽  
Yong Yang
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Thermal Deformation ◽  
Thermal Error ◽  
Theory And Practice ◽  
Deformation Analysis ◽  
Transfer Coefficients ◽  
Gear Hobbing ◽  
Simulation Results ◽  
Dry Hobbing

Gear hobbing is the use of machinery to manufacture external gears. With the booming motor industry, there are more requirements for gear hobbing accuracy than ever before. Thermal error – as a major source of error in a dry hobbing machine – must be effectively compensated to achieve accuracy. Thus, studies on the thermal error of hob assembly are important both in theory and practice. This paper discusses the development of a valid numerical modelling method for the hob assembly of a dry hobbing machine. The equations used to determine the values of heat sources and heat transfer coefficients are given. The temperature field and thermal deformation of the hob assembly were obtained by thermal-structural coupling numerical simulations. Numerical results showed that the deformation can maximally reach to 94.5 µm, which is non-ignorable in the thermal deformation analysis of the whole dry gear hobbing machine. Subsequently, by comparing the simulation results and experimental data, the newly proposed method to determine the forced convection heat transfer coefficient proved more fitting for describing the airflow pattern inside the gear hobbing zone. The satisfactory agreement between simulation results and experimental data also suggests that the numerical analysis method proposed in this paper can provide an effective research tool to optimize the design of hob assembly. And the results obtained by the proposed method can be used for thermal error modelling in real error compensation.

scholarly journals Experiment and numerical simulation on transient heat transfer from SiC foam to airflow in a high temperature tube

2018 ◽  
Vol 22 (Suppl. 2) ◽  
pp. 597-606 ◽  
Author(s):  
Xinlin Xia ◽  
Xue Chen ◽  
Xiaolei Li ◽  
Liu Bo ◽  
Yafen Han
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Numerical Simulation ◽  
Steady State ◽  
High Temperature ◽  
Air Flow ◽  
Ceramic Foam ◽  
Transient Temperature ◽  
Transfer Behavior ◽  
Flow Velocities

In order to understand the high temperature heat transfer behavior of ceramic foam to air-flow, experiment and numerical simulation have been conducted for a tube fully filled with SiC foam under several air-flow velocities. The tested sample of SiC foam is characterized by a porosity of 0.88 and 10 pores per inch, which is heated to 1000?C before the air-flow passes through. The transient temperature variation is recorded and discussed for several inlet air-flow velocities ( 2.9 m/s, 4.3 m/s and 5.8 m/s). Then, a computational model for the transient process is developed to nu- merically investigate the coupled radiative and convective heat transfer, and compared with the experimental data. The results show that the heat transfer reaches steady-state quickly and the time needed is less than 80 second. The transient devia- tion between the predicted and experimental data is less than 25.0%. Besides, it is found that there exists an obvious temperature difference between the fluid and solid phases, the maximum difference occurs at the neighbor region of tube wall and decreases as the inlet velocity increases at the steady-state.

The Modeling of a Thermosyphon Type Permafrost Protection Device

1975 ◽  
Vol 97 (3) ◽  
pp. 382-386 ◽  
Author(s):  
R. L. Reid ◽  
J. S. Tennant ◽  
K. W. Childs
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Driving Force ◽  
Removal Rate ◽  
Heat Removal ◽  
Protection Device ◽  
Boundary Layer Equations ◽  
Flow And Heat Transfer ◽  
The Difference ◽  
Permafrost Protection

One promising device for protection of permafrost is the concentric tube thermosyphon. In the winter, the difference in temperature between the annulus and the tube provides a buoyant driving force to move the air down the tube and up the annulus. The resultant heat transfer freezes and subcools the permafrost. The paper describes in detail the flow and heat transfer by solving the boundary layer equations for velocity and temperature considering conduction and radiation at the boundaries. The predicted thermosyphon performance is compared with experimental data. The results for heat removal rate are generally within 10–20 percent.

scholarly journals Numerical study of thermal stress of a silicon mirror forming a beam of synchrotron radiation

2021 ◽  
Vol 2119 (1) ◽  
pp. 012148
Author(s):  
K.A. Finnikov ◽  
V.V. Vinokurov ◽  
A.D. Nikolenko ◽  
Y.V. Zubavichus ◽  
O.A. Kabov
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Thermal Stress ◽  
Synchrotron Radiation ◽  
Stressed State ◽  
Thermal Deformation ◽  
Numerical Study ◽  
Synchrotron Radiation Beam ◽  
Radiation Beam ◽  
Thermally Stressed State

Abstract Numerical simulation of heat transfer in a mirror for focusing a synchrotron radiation beam and its thermally stressed state has been carried out. The choice of the method for cooling the mirror through contact with the water-cooled plates, which provides the specified limitations on thermal deformation, has been substantiated. The modes of heat transfer, implemented under different conditions of heat transfer at the boundary of the mirror with water-cooled plates, are compared.

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