An experimental system has been built to produce and measure the magnetic field in the backward ejected matter during hypervelocity impact. The designs of measurement system and coil, the choice of associated equipmen...An experimental system has been built to produce and measure the magnetic field in the backward ejected matter during hypervelocity impact. The designs of measurement system and coil, the choice of associated equipment, and the system calibration are also described in detail. The measurement of magnetic induction intensity for different given coil positions and azimuth angles are performed with two-stage light-gas gun. On condition that impact velocities are approximately equal and incidence angles are 45°, 60° and 90° respectively, the relationship between average magnetic induction intensity and impact angle at different time spans is obtained. Experimental results show that the average magnetic induction intensity with incidence angle of 90° is larger than those with incidence angles of 45°and 60°.展开更多
In order to investigate the effect of magnetic field on the liquid-liquid extraction, the extraction in the acetone-water-trichloroethane system was studied under magnetic field with different magnetic induction inten...In order to investigate the effect of magnetic field on the liquid-liquid extraction, the extraction in the acetone-water-trichloroethane system was studied under magnetic field with different magnetic induction intensity.The results showed that the effect of magnetic field was positive in the extraction process, and the partition coeffi-cient and the yield of acetone increased-with the increasing magnetic induction intensity by 5.16%-8.35% and 1.85%-5.70% respectively. The effect of magnetic field on the extraction was intensified when the temperature became, higher. The experimental data of the partition coefficient of acetone were correlated by the method of least square in terms of a power-law correlation.展开更多
The grounding grid buried in the earth will become a hidden danger to the safety of substations due to some faults of breaks or thinner conductors in corrosion.A novel method to get accurate status of grounding grid w...The grounding grid buried in the earth will become a hidden danger to the safety of substations due to some faults of breaks or thinner conductors in corrosion.A novel method to get accurate status of grounding grid was proposed based on measuring magnetic induction intensity.The basic structure of grounding grid without working drawing was concluded,and the positions and the status of faults were diagnosed by this method.The completed detecting system,including hardware device of data measurement,diagnosis,and analysis software,was introduced concisely.The results of simulations and applications show that this method is simple and effective in the practical engineering.展开更多
The distribution of electromagnetic fields and electromagnetic force of F-EMS were simulated by ANSYS12.0 software. The magnetic induction intensity and electromagnetic force of billet with various stirring parameters...The distribution of electromagnetic fields and electromagnetic force of F-EMS were simulated by ANSYS12.0 software. The magnetic induction intensity and electromagnetic force of billet with various stirring parameters were cal- culated, then the relationship between the magnetic induction intensity and electromagnetic force was calculated. The results showed that the electromagnetic force is not positive with the magnetic induction intensity. Depending on the com- bination of the practical production, the central segregation of high carbon steel SWRH77B is improved effectively under the best stirring parameter that the current is 360A and the frequency is 12Hz.展开更多
基金National Natural Science Foundation of China (10772028)Talent Resources Development Special Funds of Shenyang (20081400103009)Doctoral Initiation Special Fund of Shenyang Ligong University
文摘An experimental system has been built to produce and measure the magnetic field in the backward ejected matter during hypervelocity impact. The designs of measurement system and coil, the choice of associated equipment, and the system calibration are also described in detail. The measurement of magnetic induction intensity for different given coil positions and azimuth angles are performed with two-stage light-gas gun. On condition that impact velocities are approximately equal and incidence angles are 45°, 60° and 90° respectively, the relationship between average magnetic induction intensity and impact angle at different time spans is obtained. Experimental results show that the average magnetic induction intensity with incidence angle of 90° is larger than those with incidence angles of 45°and 60°.
基金Supported by the Program on Technological Development Plan of Tianjin (No.033180611).
文摘In order to investigate the effect of magnetic field on the liquid-liquid extraction, the extraction in the acetone-water-trichloroethane system was studied under magnetic field with different magnetic induction intensity.The results showed that the effect of magnetic field was positive in the extraction process, and the partition coeffi-cient and the yield of acetone increased-with the increasing magnetic induction intensity by 5.16%-8.35% and 1.85%-5.70% respectively. The effect of magnetic field on the extraction was intensified when the temperature became, higher. The experimental data of the partition coefficient of acetone were correlated by the method of least square in terms of a power-law correlation.
基金This work was supported in part by the Scientific Research Foundation of Doctor Degree in North China Electric Power University(200912008).
文摘The grounding grid buried in the earth will become a hidden danger to the safety of substations due to some faults of breaks or thinner conductors in corrosion.A novel method to get accurate status of grounding grid was proposed based on measuring magnetic induction intensity.The basic structure of grounding grid without working drawing was concluded,and the positions and the status of faults were diagnosed by this method.The completed detecting system,including hardware device of data measurement,diagnosis,and analysis software,was introduced concisely.The results of simulations and applications show that this method is simple and effective in the practical engineering.
文摘The distribution of electromagnetic fields and electromagnetic force of F-EMS were simulated by ANSYS12.0 software. The magnetic induction intensity and electromagnetic force of billet with various stirring parameters were cal- culated, then the relationship between the magnetic induction intensity and electromagnetic force was calculated. The results showed that the electromagnetic force is not positive with the magnetic induction intensity. Depending on the com- bination of the practical production, the central segregation of high carbon steel SWRH77B is improved effectively under the best stirring parameter that the current is 360A and the frequency is 12Hz.
