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加热工况
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     Experiments were carried out on the Freon 113 modeling setup. Flow instabilities under three pressure conditions, six heat inputs and varions mass flow rates were investigated.
     实验在氟利昂-113试验台上进行,研究了不同布置U型管在三种压力工况,六种加热工况及各种流量下的流动不稳定性。
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     The results show that the grid spacer, especially the mixing vane, has a significant influence on the flow and phase distribution. The results should be the basis for further researching on vapor-water two-phase flow and heat transfer and development of the fuel subassembly with high thermal hydraulic performance.
     结果表明 ,定位格架结构 ,特别是交混叶片对定位格架附近区域两相流动和空泡份额分布特性有重要影响 ,从而为进一步研究棒束定位格架加热工况下两相流动特性 ,发展新型高热工水力性能燃料组件打下基础
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     This paper's main aim is at the intermittently heating of deep underground engineering, dynamically analyzes temperature distribution and conjugates heat transfer of indoor air and ambient-stone in underground engineering.
     本文主要针对深埋地下工程的间歇加热工况,对工程内部环境与周围岩石的温度分布及耦合传热情况进行动态分析,并进一步指导动态设计。
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  相似匹配句对
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     THE ION HEATING DURING ICRH
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     heating temperature(T) 11000C ;
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This paper studied the influence on instabilities of U type tube with different placement experimentally and theoretically. Experiments were carried out on the Freon 113 modeling setup. Flow instabilities under three pressure conditions, six heat inputs and varions mass flow rates were investigated. The Laws law was employed to determine the P.D.O thresholds and the thresholds of U type tube with different placement were comparied. Numerical method was used to calculate the U type tube used in the practical...

This paper studied the influence on instabilities of U type tube with different placement experimentally and theoretically. Experiments were carried out on the Freon 113 modeling setup. Flow instabilities under three pressure conditions, six heat inputs and varions mass flow rates were investigated. The Laws law was employed to determine the P.D.O thresholds and the thresholds of U type tube with different placement were comparied. Numerical method was used to calculate the U type tube used in the practical engineering application and the thresholds of U type tube with different placement in the higher system pressure were also comparied.

从实验和理论两方面研究了不同布置方式对加热U型管不稳定性的影响。实验在氟利昂-113试验台上进行,研究了不同布置U型管在三种压力工况,六种加热工况及各种流量下的流动不稳定性。理论研究得出了系统稳定性的判据,比较了不同布置方式U型管的脉动起始边界;并对实际工业现场的U型管布置方式进行了模拟数值计算,比较了在较高系统压力下不同布置方式U型管的脉动起始边界

Void fraction distribution characteristics in rod bundle with grid spacer is one of the important aspects in reactor thermal hydraulic characteristics research. A test using a specially designed 3×3 rod bundle test section with AFA-2G structure spacer has been performed under air-water two-phase flow. The RBI optical probes were used to measure void fractions and the distribution regularity also has been analyzed. The results show that the grid spacer, especially the mixing vane, has a significant influence...

Void fraction distribution characteristics in rod bundle with grid spacer is one of the important aspects in reactor thermal hydraulic characteristics research. A test using a specially designed 3×3 rod bundle test section with AFA-2G structure spacer has been performed under air-water two-phase flow. The RBI optical probes were used to measure void fractions and the distribution regularity also has been analyzed. The results show that the grid spacer, especially the mixing vane, has a significant influence on the flow and phase distribution. The results should be the basis for further researching on vapor-water two-phase flow and heat transfer and development of the fuel subassembly with high thermal hydraulic performance.

带定位格架棒束通道内的空泡份额分布特性是反应堆热工水力特性研究的重要内容。对AFA 2G3× 3定位格架组成的棒束通道在空气 水两相流动工况下用RBI光学探针测得了通道内的横向空泡份额分布 ,分析了其横向分布的一般规律。结果表明 ,定位格架结构 ,特别是交混叶片对定位格架附近区域两相流动和空泡份额分布特性有重要影响 ,从而为进一步研究棒束定位格架加热工况下两相流动特性 ,发展新型高热工水力性能燃料组件打下基础

Conventional static designs no longer filled the demand of the economical and efficient interior environmental safeguard system in the underground engineering. This paper's main aim is at the intermittently heating of deep underground engineering, dynamically analyzes temperature distribution and conjugates heat transfer of indoor air and ambient-stone in underground engineering. Based on the physical geometric model of vaulted underground structures, whole-field solution method is used; controlling differential...

Conventional static designs no longer filled the demand of the economical and efficient interior environmental safeguard system in the underground engineering. This paper's main aim is at the intermittently heating of deep underground engineering, dynamically analyzes temperature distribution and conjugates heat transfer of indoor air and ambient-stone in underground engineering. Based on the physical geometric model of vaulted underground structures, whole-field solution method is used; controlling differential equations of the regions of solid and fluid is united; complicated coupling boundary into interior boundary is transformed. The whole numerical simulation process adopts PHOENICS (Version 3.4) to solve. At the same time we improves existing PHOENICS program to get the general experiential model for underground engineering, and provides a feasible method to solve unsteady-state conjugated heat transfer problems. Otherwise, this paper also analyzes the influence of ventilated volume and indoor heating source concretely.

传统的静态极限设计方法已经不能满足地下工程内部环境保障系统设计的经济合理有效要求。本文主要针对深埋地下工程的间歇加热工况,对工程内部环境与周围岩石的温度分布及耦合传热情况进行动态分析,并进一步指导动态设计。简化间歇机制下深埋拱形地下建筑的数学物理模型,采用整场求解方法,通过建立流体和固体区域的统一控制微分方程,将复杂的固体导热与流体对流换热通过彼此互为边界条件耦合起来。整个数值模拟过程采用大型计算软件PHOENICS3.4进行求解,并对现有软件程序加以改进得出经验模型,使CFD软件能更广泛应用于地下工程的通风空调设计中,为求解非稳态的导热和对流换热耦合问题提供了一种新的可行研究方法。此外还具体分析了进风风速、室内热源等方面的因素对温度分布的影响。

 
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