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维普期刊数据库

COMPUTATION OF RECIRCULATING SWIRLING FLOW WITH THE GLM reynolds STRESS CLOSURE

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Acta Mechanica Sinica 1994年第2期10卷 110-120页

作者：符松 Department of Engineering Mechanics Tsinghua University Beijing China 100084

A reynolds stress closure based on the generalized Langevin model (GLM), developed by Haworth and Pope, is applied to the flow calculation with swirl-induced recirculation. The purpose of the work is to assess the performance of this model under the complex flow conditions caused by the presence of strong swirl which gives rise to both unconventional recirculation in the vicinity of the symmetry axis and strong anisotropy in the turbulence field. Comparison of the computational results are made both with the experimental data of Roback and Johnson and the computational results obtained with the typical isotropization of production model (IPM) and the k-∈ type Boussinesq viscosity model.

关键词： swirling flow turbulence modelling reynolds stresses generalized Langevin model probability-density function

维普期刊数据库

EXPERI MENTAL INVESTIGATION INTO HOT WATER SLOT JETS WITH NEGATIVELY BUOYANCYIN CROSS FLOW

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Journal of Hydrodynamics 2005年第4期17卷 412-417页

作者： YANG Zhong-hua HUAI Wen-xin DAI Hui-chao State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China

An experiment was conducted to examine the near-field behavior of negatively buoyant planar jets in flowing environment. Hot water jet was projected downwards at dif fercnt angles from a slot into a uniform cross flow. Micro Acoustic Doppler Velocimeter （Micro ADV） system is used to measure the velocity and turbulent fluxes of reynolds stresses. The whole field temperatures were measured with fast response thermocouples. Pure jets experiments were made also to study the effect of buoyancy in negatively buoyant jets. It is found that the influenced area of hot jets is larger than which of pure jets when the jet angle is 90° and the influenced area of hot jets is smaller than which of pure jets when the jet angle is 45°. The difference is not obvious at 60° angle jets. This means that the rising of temperature has effect not only on negatively buoyancy, but also on the intensity of turbulence. The contrast of these two influences dominates the trend of jet flow.

关键词： negatively buoyant planar jets Micro Acoustic Doppler Velocimeter (Micro ADV) reynolds stresses

维普期刊数据库

Role of Advanced Refueling and Heating on Edge reynolds Stress-induced Poloidal Flow in the HL-1M Tokamak

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中国核科技报告 2002年 889-892页

作者： HONG Wenyu WANG Enyao GAO Jianyong LI Qiang

The plasma confinement is sensitive to the edge conditions. Generally, edge parameters such as the edge density, temperature, reynolds stress, poloidal flow velocity, radial and poloidal electric field are measured by... 详细信息

关键词： reynolds stresses Poloidal flow velocity Radial and poloidal electric field

Edge Plasma Performance of Lower Hybrid Wave Injection on the HL-1M Tokamak

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中国核科技报告 2002年 892-895页

作者： HONG Wenyu WANG Enyao GAO Jianyong LI Qiang

Recently, the L-mode to H-mode (L-H) transition in tokamak plasma confinement was found to be related to the presence of the poloidal flow shear near the plasma edge. An important mechanism is the ion orbit loss cause... 详细信息

关键词： reynolds stresses Poloidal flow velocity Radial and poloidal electric field