High power experiment and heat load evaluation of transmission line for the ECH/CD system in JT-60SA

2022 ◽  
Vol 175 ◽  
pp. 113009
Author(s):  
T. Kobayashi ◽  
H. Yamazaki ◽  
S. Hiranai ◽  
M. Sawahata ◽  
M. Terakado ◽  
...  
Keyword(s):  
Transmission Line ◽  
High Power ◽  
Heat Load ◽  
Load Evaluation

scholarly journals Amplification characteristics in active tapered segmented cladding fiber with large mode area

2021 ◽  
Vol 9 ◽  
Author(s):  
Caijian Xie ◽  
Tigang Ning ◽  
Jingjing Zheng ◽  
Li Pei ◽  
Jianshuai Wang ◽  
...  
Keyword(s):  
High Power ◽  
Heat Load ◽  
Nonlinear Effects ◽  
Single Mode ◽  
Large Mode Area ◽  
High Loss ◽  
Effective Mode Area ◽  
Steady State Rate ◽  
State Rate ◽  
Mode Area

Abstract A kind of tapered segmented cladding fiber (T-SCF) with large mode area (LMA) is proposed, and the mode and amplification characteristics of T-SCFs with concave, linear, and convex tapered structures are investigated based on finite-element method (FEM) and few-mode steady-state rate equation. Simulation results indicate that the concave tapered structure can introduce high loss for high-order modes (HOMs) that is advantageous to achieve single-mode operation, whereas the convex tapered structure provides large effective mode area that can help to mitigate nonlinear effects. Meanwhile, the small-to-large amplification scheme shows further advantages on stripping off HOMs, and the large-to-small amplification scheme decreases the heat load density induced by the high-power pump. Moreover, single-mode propagation performance, effective mode area, and heat load density of the T-SCF are superior to those of tapered step index fiber (T-SIF). These theoretical model and numerical results can provide instructive suggestions for designing high-power fiber lasers and amplifiers.

Short Length High-Power Water Filled Coaxial Transmission Line for Long Pulses

2018 ◽  
Author(s):  
Artem Kuskov ◽  
Joe Chen ◽  
Maxwell Lerma ◽  
Thomas Schmidt ◽  
Salvador Portillo
Keyword(s):  
Transmission Line ◽  
High Power ◽  
Short Length

Design for high power and low impedance triplate transmission line

2010 ◽  
Vol 22 (3) ◽  
pp. 519-523
Author(s):  
关永超 Guan Yongchao ◽  
王勐 Wang Meng ◽  
丰树平 Feng Shuping ◽  
曹文斌 Cao Wenbin
Keyword(s):  
Transmission Line ◽  
High Power

scholarly journals The Design and Investigation of a Cooling System for a High Power Ni-MH Battery Pack in Hybrid Electric Vehicles

2020 ◽  
Vol 10 (5) ◽  
pp. 1660
Author(s):  
Aihua Chu ◽  
Yinnan Yuan ◽  
Jianxin Zhu ◽  
Xiao Lu ◽  
Chenquan Zhou
Keyword(s):  
High Power ◽  
Heat Load ◽  
Cooling System ◽  
Discharge Rate ◽  
Branch Pipe ◽  
Fluid Simulation ◽  
Battery Pack ◽  
Maximum Temperature ◽  
Liquid Cooling ◽  
Mh Battery

High power cylindrical Ni-MH battery cells have a heavy heat load because of their high discharge rate and large equivalent internal resistance. This heavy heat load, together with an imbalanced flow in parallel liquid cooling systems, can lead to variances in the temperature of each cell in the entire battery pack, thereby reducing the life cycle of the battery pack. In this paper, a parallel-series combined liquid cooling system for a 288V Ni-MH battery pack was designed, and several parameters that influence the flow balance of the system by heat transfer and fluid dynamics were calculated. Then, a thermal-fluid simulation was executed with different parameters using StarCCM+ software, and the simulation results were validated by a battery pack temperature experiment on a bench and in a vehicle. The results indicate that the cell’s temperature and temperature differences can be kept within an ideal range. We also determined that within the battery power requirements and structural spacing limits, the total flow rate of the cooling liquid, the cross-sectional area ratio of the main pipe to the branch pipes, and the number of internal supporting walls in each branch pipe need to be large enough to minimize the cell’s maximum temperature and temperature differences.

Sign in / Sign up

Export Citation Format

Share Document