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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >RBHT STEAM COOLING AND DROPLET INJECTION PRE-TEST ANALYSIS USING COBRA-TF
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RBHT STEAM COOLING AND DROPLET INJECTION PRE-TEST ANALYSIS USING COBRA-TF

机译：使用COBRA-TF的RBHT蒸汽冷却和液滴喷射预测试分析

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摘要

The droplet injection experiments to be performed in a 7X7 rod bundle heat transfer test facility are being simulated using an advanced thermal hydraulics computer code called COBRA-TF. A current version of the code, which provides a three-dimensional, two-fluid, three-field representation of the two-phase flow, is modified to facilitate the simulation of the droplet field produced by the injection system in the test facility. The liquid phase is split into a continuous liquid field and droplet field where a separate momentum and mass equation is solved for each field, with the effects of spacer grids being properly accounted for. Pre-test analyses using the modified COBRA-TF code have been conducted for different injection conditions. Results indicate that there are specific ranges of conditions that can be simulated within the facility constraints to provide for validation of the dispersed flow film boiling models. The numerical results also show important effects of the spacer grids on the local heat transfer in the dispersed flow film boiling regime.
机译：正在使用称为COBRA-TF的先进热力学计算机代码对在7X7棒束传热测试设备中进行的液滴喷射实验进行仿真。修改了当前版本的代码，该代码提供了两相流的三维，两流体，三场表示，以便于模拟测试设备中注射系统产生的液滴场。液相被分成连续的液相和液滴场，在其中为每个场求解单独的动量和质量方程，并适当考虑了间隔栅的影响。针对不同的进样条件，使用修改后的COBRA-TF代码进行了预测试分析。结果表明，可以在设施约束内模拟特定条件范围，以验证分散流膜沸腾模型的有效性。数值结果还表明，间隔栅对分散流膜沸腾过程中的局部传热有重要影响。

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