A new method was presented to inhibit bulging deformation and fluctuation of free surface by magnetic pressure.A research combined with numerical and experimental methods was conducted to investigate the feasibility a...A new method was presented to inhibit bulging deformation and fluctuation of free surface by magnetic pressure.A research combined with numerical and experimental methods was conducted to investigate the feasibility and inhibition efficiency.The parameters including magnetic flux density,frequency and action area of magnetic pressure were analyzed.The results show that the method is feasible,and the bulged free surface is fully inhibited by the proper magnetic pressure.The inhibition efficiency increases as the increase in magnetic flux density and frequency,which shows a linear rela-tionship with the magnetic flux density.The frequency has a great influence on the inhibition efficiency when the frequency is changed from 0.15 to 5.00 kHz.However,the frequency more than 5.00 kHz has little influence on the inhibition efficiency and is recommended in application process.When the ratio of the action area to the area of bulged free surface is 0.8,the best inhibition is achieved.However,when the ratio is more than 1.2,a distinct W-shaped free surface is observed.The surficial and internal flow is strengthened with proper magnetic pressure imposed.Moreover,under the action of magnetic pressure,the fluctuation amplitude of free surface decreases from 4.0 to 1.2 mm and the main fluctuation with frequency of 2.34 Hz is dispersed into several minor fluctuations with frequency of 0.4-4.3 Hz.展开更多
A new method was presented to constrain deformation and oscillations of liquid metal free surface by using a high frequency magnetic field.A magnetic field generator was designed to investigate its feasibility using n...A new method was presented to constrain deformation and oscillations of liquid metal free surface by using a high frequency magnetic field.A magnetic field generator was designed to investigate its feasibility using numerical simulation and physical simulation.The results indicate the feasibility of controlling bulge deformation of liquid metal surface using magnetic pressure.Sunken deformation with a slight fluctuation occurs on the surface when magnetic pressure acts on the static liquid metal surface.The largest amplitude remains within±0.8mm even if current reaches 1 400 A.In case of the bump-type deformation,the magnetic pressure strengthens gravity field by the superposition effect,dissipates the kinetic energy of metal flow impacting on free surface in advance,reduces the velocity of free surface,and decreases the bulge height.On the region without magnetic field,the liquid metal surface rises and tends to be flat because of the significant damping effect on surface fluctuation.The constraint strength of the magnetic pressure increases with the augment of current intensity.However,different heights of bulge deformation should have a corresponding reasonable coil current for achieving the best constraint effect.展开更多
基金National Natural Science Foundation of China(Nos.51474065 and 51574083)the 111 Project(2.0)of China(No.BP0719037).
文摘A new method was presented to inhibit bulging deformation and fluctuation of free surface by magnetic pressure.A research combined with numerical and experimental methods was conducted to investigate the feasibility and inhibition efficiency.The parameters including magnetic flux density,frequency and action area of magnetic pressure were analyzed.The results show that the method is feasible,and the bulged free surface is fully inhibited by the proper magnetic pressure.The inhibition efficiency increases as the increase in magnetic flux density and frequency,which shows a linear rela-tionship with the magnetic flux density.The frequency has a great influence on the inhibition efficiency when the frequency is changed from 0.15 to 5.00 kHz.However,the frequency more than 5.00 kHz has little influence on the inhibition efficiency and is recommended in application process.When the ratio of the action area to the area of bulged free surface is 0.8,the best inhibition is achieved.However,when the ratio is more than 1.2,a distinct W-shaped free surface is observed.The surficial and internal flow is strengthened with proper magnetic pressure imposed.Moreover,under the action of magnetic pressure,the fluctuation amplitude of free surface decreases from 4.0 to 1.2 mm and the main fluctuation with frequency of 2.34 Hz is dispersed into several minor fluctuations with frequency of 0.4-4.3 Hz.
基金Item Sponsored by National Natural Science Foundation of China(51474065,51574083)Doctoral Scientific Research Foundation of Liaoning Province of China(20141008)+1 种基金Fundamental Research Funds for Central Universities of China(L1509003)Program of Introducing Talents of Discipline to Universities of China(B07015)
文摘A new method was presented to constrain deformation and oscillations of liquid metal free surface by using a high frequency magnetic field.A magnetic field generator was designed to investigate its feasibility using numerical simulation and physical simulation.The results indicate the feasibility of controlling bulge deformation of liquid metal surface using magnetic pressure.Sunken deformation with a slight fluctuation occurs on the surface when magnetic pressure acts on the static liquid metal surface.The largest amplitude remains within±0.8mm even if current reaches 1 400 A.In case of the bump-type deformation,the magnetic pressure strengthens gravity field by the superposition effect,dissipates the kinetic energy of metal flow impacting on free surface in advance,reduces the velocity of free surface,and decreases the bulge height.On the region without magnetic field,the liquid metal surface rises and tends to be flat because of the significant damping effect on surface fluctuation.The constraint strength of the magnetic pressure increases with the augment of current intensity.However,different heights of bulge deformation should have a corresponding reasonable coil current for achieving the best constraint effect.
