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81.
利用理想磁流体力学模型对有轴向剪切流的Z箍缩等离子体不稳定性进行了分析。给出了可压缩模型的色散关系,分别对可压缩及不可压缩模型中轴向剪切流对Z箍缩等离子体瑞利-泰勒不稳定性的抑制作用进行了比较,讨论了可压缩性对含有轴向剪切流系统不稳定性的影响。结果表明,可压缩性能够减缓瑞利-泰勒P凯尔文-亥姆霍兹(RTPKH)模扰动的增长,因而使得轴向剪切流对系统不稳定性的抑制作用表现得更为突出。计算结果还说明,在RT不稳定性线性增长阶段,等离子体温度较低,使用可压缩模型能够更真实地描述系统的状态。 相似文献
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83.
MHD boundary layer flow of Casson fluid passing through an exponentially stretching permeable surface with thermal radiation
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This article numerically examines the boundary layer flow due to an exponentially stretching surface in the presence of an applied magnetic field. Casson fluid model is used to characterize the non-Newtonian fluid behavior. The flow is subjected to suction/blowing at the surface. Analysis is carded out in presence of thermal radiation and prescribed surface heat flux. In this study, an exponential order stretching velocity and prescribed exponential order surface heat flux are accorded with each other. The governing partial differential equations are first converted into nonlinear ordinary differential equations by using appropriate transformations and then solved numerically. The effect of increasing values of the Casson parameter is to suppress the velocity field. However the temperature is enhanced when Casson parameter increases. It is found that the skin-friction coefficient increases with increasing values of suction parameter. Temperature also increases for large values of power index n in both suction and blowing cases at the boundary. It is observed that the thermal radiation enhances the effective thermal diffusivity and hence the temperature rises. 相似文献
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85.
The magnetohydrodynamic(MHD) mixed convection flow past a shrinking vertical sheet with thermal radiation is considered. Besides, the effects of Cu-Al2O3 nanoparticles and dust particles are considered. The similarity variables reduce the governing equations to the similarity equations, which are then solved numerically. The outcome shows that, for the shrinking case, the solutions are not unique. The rate of heat transfer and the friction factor enlarge with increasing the... 相似文献
86.
应用计算机测定PN结正向压降的温度特性 总被引:3,自引:2,他引:1
采用电热法把待测的PN结放置于温度可连续变化的热源中,利用精确的温度传感器进行温度测量,并利用计算机数据采集技术,直观地再现了PN结正向压降随温度线性变化的整个物理过程,提高了测量的精度. 相似文献
87.
ZHOU Jun RAO Jun CHEN Gangyu ZHANG Jinsong SONG Shaodong LU Zhihong LEI Jianxin HUANG Mei 《核工业西南物理研究院年报(英文版)》2005,(1):54-55
Electron cyclotron resonance heating and electron cyclotron current drive ( ECRH/ECCD ) have been developed significantly in recent years in many devices such as Tore Supra, JT-60U, Heliotron J. It has many advantages over other means of heating and current drive. The EC power can be injected as narrow gaussian beams, giving rise to so highly localized power deposition as to make ECRH an ideal candidate for local MHD control. 相似文献
88.
PAN Chanjie XU Zengyu 《核工业西南物理研究院年报(英文版)》2005,(1):117-118
A series of experimental studies on MHD effects in circular and rectasgular pipe of conducting and insulating wall, have been carried out on liquid metal experimental loop ( LMEL ),sodium potassium alloy ( NaK ) reacts actively with oxygen in air, 相似文献
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90.
SHIBingren 《核工业西南物理研究院年报(英文版)》2002,(1):91-94
In large tokamak device and reactor designs, the relationship between the toroidal current and the edge safety factor is very important because this will determine the eventual device or reactor size according to MHD stability requirements. In many preliminary 相似文献