两流体双压力热工水力系统分析软件LOCUST 2.0架构设计

徐财红; 袁红胜; 柳焕楠; 琚忠云; 李昌莹; 王婷; 厉井钢

doi:10.13832/j.jnpe.2023.06.0086

两流体双压力热工水力系统分析软件LOCUST 2.0架构设计

doi: 10.13832/j.jnpe.2023.06.0086

中广核研究院有限公司，广东深圳，518000

详细信息

作者简介:
徐财红（1988—），男，硕士研究生，现主要从事热工水力分析软件开发方面的研究，E-mail: xch_sjtu@126.com

中图分类号: TL334
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出版历程
- 收稿日期: 2022-12-20
- 修回日期: 2023-06-26
- 网络出版日期: 2023-12-11
- 刊出日期: 2023-12-15

Architecture Design of Two-Fluid Two-Pressure Thermal-Hydraulic System Analysis Code LOCUST 2.0

China Nuclear Power Technology Research Institute Co., Ltd., Shengzhen, Guangdong, 518000, China

摘要

摘要: 中国广核集团（CGN）研发了一款新的热工水力系统分析软件LOCUST 2.0，它采用两流体两场双压力七方程模型，从理论上保证了守恒方程的严格适定性。LOCUST 2.0的应用对象为华龙一号失水事故类的安全分析，目前已初步完成代码开发。本文简要描述了该软件的守恒方程、数值算法、软件功能、源代码架构设计；给出了6个典型案例的分析计算，结果表明该软件能够合理预测热工水力进程，性能良好。
- LOCUST 2.0 /
- 双压力模型 /
- 系统分析软件 /
- 软件架构设计
Abstract: China General Nuclear Power Corporation (CGN) is developing a new thermal hydraulic system analysis code LOCUST 2.0, which uses two-fluid two-field two-pressure seven-equation models, theoretically ensuring the strict well-posedness of conservation equations. The design application of LOCUST 2.0 is the safety analysis of loss-of-coolant accidents (LOCAs) for HPR1000, and its source codes have been preliminarily completed at present. In this paper, the conservation equations, numerical methods, software functions, and code architecture design are briefed introduced. Meanwhile, the calculation results of six typical test cases are given, and the results show that the code reasonably predicts the thermal-hydraulic processes and has good performance.
- LOCUST 2.0 /
- Two-pressure models /
- System analysis code /
- Code architecture design

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图 1 节点图举例

Figure 1. Example of Node Graph

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图 2 LOCUST 2.0源代码框架

Figure 2. Source Code Frame of LOCUST 2.0

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图 3 LOCUST 2.0主要计算流程图

ACC—蓄压安注箱

Figure 3. Calculation Flow Chart of LOCUST 2.0

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图 4 水自由落体节点图与计算结果

Figure 4. Nodalization Diagram and Calculation Results for Water Free Fall Case

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图 5 ANL竖直管试验空泡份额测量值与计算值的对比

j_f—液相表观速度

Figure 5. Comparison of Measured and Predicted Void Fractions for ANL Vertical Pipe Test

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图 6 FRIGG-2棒束试验轴向空泡份额分布

Figure 6. Axial Distribution of Void Fraction for Rod Bundle Test FRIGG-2

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图 7 Marviken临界流试验工况22喷放流量

Figure 7. Blowdown Mass Flow Rate of Marvike Critical Flow Test 22

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图 8 棒束试验THTF轴向棒壁面温度

Figure 8. Wall Temperature of Rod Bundle Test THTF

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图 9 FLECHT-SEASET电加热棒壁面温度

Figure 9. Heated Rod Wall Temperature of FLECHT-SEASET Test Cases

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表 1 不同系统程序结构的对比

Table 1. Structure Comparison of Different System Codes

序号	程序结构	优点	缺点	典型代表
1	两场五方程模型（一个混合物动量方程+滑速比模型）	无条件适定；计算量相对更少	两相动力学描述偏于简单，对于非泡状流型的模拟能力不足	RETRAN-02
2	两场六方程模型	两相动力学描述较精细	存在不适定区域（可通过虚拟质量力等进行改善）	RELAP5、 TRACE
3	两场七方程模型	无条件适定；两相动力学描述较精细	计算量相对六方程模型更大；成熟性尚有限	RELAP7、 LOCUST 2.0

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