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A method for searching and eliminating potentially false paths of the system is devised as well as a method for taking into account specified constraints on the mutual operation of parallel channels.


When the discharge formation is completed, the main electrodes of the MSGs are shortcircuited by discharges through parallel channels (whose number is equal to the number of bars).


Use of parallel channels in wideband signal recorders


There are parallel channels which are not fully connected in practice, such as Frequency Division Multiplex (FDM or Orthogonal FDM) systems.


Conventional spacetime codes can be used for such parallel channels but not the optimal.

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 Numerical simulation of turbulent flow with recirculation was conducted by SIMPLE algo rithm with twoequation kε model. Extension of computational region method and wall function method were quoted to regulate the whole computational region geometrically, given the inlet Reynold number keeps 10000, by changing the height of the solid obstacle. The result showed that the overall wall heat flux and heat exchange Nu increased with the decreased of the angle between the velocity vector and the temperature gra... Numerical simulation of turbulent flow with recirculation was conducted by SIMPLE algo rithm with twoequation kε model. Extension of computational region method and wall function method were quoted to regulate the whole computational region geometrically, given the inlet Reynold number keeps 10000, by changing the height of the solid obstacle. The result showed that the overall wall heat flux and heat exchange Nu increased with the decreased of the angle between the velocity vector and the temperature gra dient. It verified that the field synergy principle based on 2D boundary laminar flow may be applied to com plex turbulent flow even with recirculation.  利用SIMPLE算法对两平行平板之间有凸台的湍流回流流动换热进行了数值模拟。计算采用kε两方程紊流模型,对固体区域利用区域扩充法使流场在几何上规则化,对阶梯型凸台边界用壁面函数法进行了特别处理。在入口处流体Re=10000时,数值计算得出了7组不同凸台高度相对应的流场和温度场。结果表明:平行通道表面总换热量以及换热Nu随流体速度与温度梯度矢量夹角的减小而增大,验证了基于二维边界层流提出的场协同理论同样适用于复杂的湍流回流流动。  For fluid of air, flow field and heat transfer in the laminar inflow channel mounted with triangular winglet pairs have been investigated in the Reynolds number range of 6002100. A set of laminar flow predictions in a twoplaneformed channel are presented to demonstrate how counter rotating streamwise vortices were produced, developed and interacted. The results implied that variation of transverse distance between a pair of vortex generators will impact the magnitude of average Nusselt number and vortices... For fluid of air, flow field and heat transfer in the laminar inflow channel mounted with triangular winglet pairs have been investigated in the Reynolds number range of 6002100. A set of laminar flow predictions in a twoplaneformed channel are presented to demonstrate how counter rotating streamwise vortices were produced, developed and interacted. The results implied that variation of transverse distance between a pair of vortex generators will impact the magnitude of average Nusselt number and vortices intensity. We also investigated the range of effectivedistance for single vortex generator (VG), which is helpful for heat transfer enhancement in application.  本文以空气为介质,在Re=6002100的范围内对布置有三角翅片的平行通道内的初始段层流状态下涡干涉的流动及换热进行了数值模拟。展示了旋向相反的涡在流道中的产生及发展情况,说明了涡产生器在横向位置变化时对横截面上平均Nu数和涡旋强度(?)的影响,并对单个涡产生器的有效换热区域长度进行了探讨。  The research of dissymmetric parameters are very useful to understand and eliminate the instability in parallel channels,and improve the stability of system.The experiment has been done in the thermohydraulics loop by double parallel round channels.With the inlet throttling or the degree of dissymmetry throttling increasing,the critical heating power of oscillation is increased,but the period of oscillation is not cillation is not affected,and the amplitude of oscillation is increased.The stability boundary... The research of dissymmetric parameters are very useful to understand and eliminate the instability in parallel channels,and improve the stability of system.The experiment has been done in the thermohydraulics loop by double parallel round channels.With the inlet throttling or the degree of dissymmetry throttling increasing,the critical heating power of oscillation is increased,but the period of oscillation is not cillation is not affected,and the amplitude of oscillation is increased.The stability boundary of oscillation in double parallel channels has been finished,and the experimental correlation is obtained.affected,and nonlinear effects of amplitude of oscillation are observed experimentally.With the dissymmetry degree of heated power increasing,the critical heating power of oscillation is reduced,but the period of os  研究不对称工况的参数有助于理解和消除平行通道管间脉动,提高系统的稳定性。在热工实验回路上,采用两根平行的圆管进行了不对称节流与不对称加热对管间脉动特性影响的实验研究。结果表明,随着进口节流不对称度增加,界限热功率增加,对脉动周期影响不大,脉动振幅存在非单值性变化;随着加热不对称度增加,界限热功率降低,对脉动周期影响不大,脉动振幅增大。通过整理分析,得到了不对称工况参数下的管间脉动界限判定公式。  
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