Sound Field Distribution Characteristics of Typical Kuroshio Front in Different Seasons

2021 ◽  
Author(s):  
Yuyao Liu ◽  
Wen Chen ◽  
Wei Chen ◽  
Yu Chen ◽  
Lina Ma ◽  
...  
Keyword(s):  
Field Distribution ◽  
Sound Field ◽  
Distribution Characteristics ◽  
Kuroshio Front ◽  
Different Seasons

scholarly journals Two-dimensional flow field distribution characteristics of flocking drainage pipes in tunnel

Open Physics ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 139-148
Author(s):  
Shiyang Liu ◽  
Xuefu Zhang ◽  
Feng Gao ◽  
Liangwen Wei ◽  
Qiang Liu ◽  
...  
Keyword(s):  
Flow Field ◽  
Field Distribution ◽  
Rapid Development ◽  
Maximum Velocity ◽  
Distribution Characteristics ◽  
Two Dimensional ◽  
Dimensional Flow ◽  
Laboratory Test Results ◽  
Transverse Distance ◽  
Two Dimensional Flow

AbstractWith the rapid development of traffic infrastructure in China, the problem of crystal plugging of tunnel drainage pipes becomes increasingly salient. In order to build a mechanism that is resilient to the crystal plugging of flocking drainage pipes, the present study used the numerical simulation to analyze the two-dimensional flow field distribution characteristics of flocking drainage pipes under different flocking spacings. Then, the results were compared with the laboratory test results. According to the results, the maximum velocity distribution in the flow field of flocking drainage pipes is closely related to the transverse distance h of the fluff, while the longitudinal distance h of the fluff causes little effect; when the transverse distance h of the fluff is less than 6.25D (D refers to the diameter of the fluff), the velocity between the adjacent transverse fluffs will be increased by more than 10%. Moreover, the velocity of the upstream and downstream fluffs will be decreased by 90% compared with that of the inlet; the crystal distribution can be more obvious in the place with larger velocity while it is less at the lower flow rate. The results can provide theoretical support for building a mechanism to deal with and remove the crystallization of flocking drainage pipes.

Sound Field Distribution Research of Polymer Materials Ultrasonic Probe Chip Polymer Materials

2012 ◽  
Vol 466-467 ◽  
pp. 523-527
Author(s):  
Qi Zhang ◽  
Rong Bao Chen ◽  
Xuan Yu Li ◽  
Chang Hua Chen
Keyword(s):  
Field Distribution ◽  
High Performance ◽  
Electromechanical Coupling ◽  
Sound Field ◽  
Thickness Measurement ◽  
Polymer Materials ◽  
Coarse Grained ◽  
Electromechanical Coupling Coefficient ◽  
Materials Testing ◽  
Ultrasonic Probe

Compared to the probe based on conventional piezoelectric ceramic, the high-performance ultrasonic probe made from polymer composite materials is much better, which has characteristics such as high sensitivity, wide bandwidth and good directional. And probe’s thickness electromechanical coupling coefficient KT value is up to 68%, which means it can reduce the crosstalk effectively to the phased array probe. In industrial, due to its high bandwidth, it has obvious advantages when used in coarse-grained materials testing and high-precision thickness measurement. In the medical field, ultrasound will reflex significantly at the impurities or the interfaces, and produce the Doppler effect in the flow of blood. Based on the sound field distribution comparative study of polymer materials ultrasonic probe chip, this paper proposed some polymer new applications in ultrasonic testing field.

The Influencing Factors on the Axial Magnetic Field Distribution Characteristics of GMA

2010 ◽  
Vol 139-141 ◽  
pp. 801-804
Author(s):  
Xiao Yang Jiang ◽  
Quan Guo Lu ◽  
Ding Fang Chen ◽  
Meng Lun Tao ◽  
Min Zhou
Keyword(s):  
Magnetic Field ◽  
Influencing Factors ◽  
Field Distribution ◽  
Optimization Design ◽  
Axial Magnetic Field ◽  
Magnetic Field Distribution ◽  
Distribution Characteristics ◽  
Output Performance ◽  
Magnetostrictive Actuator ◽  
Bottom Cover

. A direct aspect of influencing giant magnetostrictive actuator's output performance is the driving magnetic field characteristics. Therefore, research on the influencing factors on the axial magnetic field distribution characteristics of giant magnetostrictive actuator is of great significance in the design. This paper analyzes the importance of the axial magnetic field distribution characteristics, analyzes the driving magnetic field using finite element method based on a designed giant magnetostrictive actuator, studies the affections of coil height, coil shape , magnetic block material, shell material , skeleton material, bottom cover material and output shaft material on the axial magnetic field distribution characteristics and reaches some conclusions about the influencing factors on the axial magnetic field distribution characteristics of giant magnetostrictive actuator. According to this paper, it provides the guidance for the optimization design of the driving magnetic field of the giant magnetostrictive actuator.

Research on near Field Acoustic Characteristic of a Compound Structure with Plate & Cylindrical Hull Subjected to Sound Excitation

2013 ◽  
Vol 716 ◽  
pp. 559-564
Author(s):  
Di Jia ◽  
Feng Hui Kang ◽  
Yi Na Wang
Keyword(s):  
Field Distribution ◽  
Sound Pressure ◽  
Pressure Field ◽  
Incident Angle ◽  
Near Field ◽  
Sound Field ◽  
Acoustic Characteristic ◽  
Considerable Influence ◽  
Compound Structure ◽  
Acoustic Environment

In order to study the acoustic environment of a ship sonar platform, near-field acoustic characteristic of a compound structure with plates & a cylindrical shell (CSPCS) subjected to sound excitation is researched based on numerical simulation. Influence of frequency and sound incident angle on acoustic environment of CSPCS are studied. Study shows that the sound pressure field distribution of CSPCS is complicated. Sound pressure would be strengthened and weakened in different locations when sound pressure uniformly incident into CSPCS. Result shows that the sound pressure distribution is highly dependent on frequency and incident angle. Sound pressure field is more evenly distributed when sound wave frequency is low. Study also shows that the incident angle has considerable influence on the sound field distribution of strengthened and weakened area.

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