| 向杨,李延军,陈丹,韩瑞,刘福建,张东文.两种分层方式对温排水三维数值模拟的影响研究[J].中国水利水电科学研究院学报,2023,21(5):482-489 |
| 两种分层方式对温排水三维数值模拟的影响研究 |
| Study on the effect of two stratified methods on thermal drainage 3D mathematical model |
| 投稿时间：2023-02-02 |
| DOI：10.13244/j.cnki.jiwhr.20230016 |
| 中文关键词: 滨海核电厂 温排水 三维数模 垂向分层 MIKE 3 |
| 英文关键词:coastal nuclear power plant thermal drainage three-dimensional mathematical model vertical stratification MIKE 3 |
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| 中文摘要: |
| 三维数学模型近年来越来越多地被用于研究滨海电厂温排水环境影响问题。海域自由面随潮波动、地形复杂多变，垂向网格的划分方式在一定程度上会影响流场、温度场计算结果。本文以某滨海核电厂为例，采用MIKE 3软件开发斜压三维水动力水温模型，在总分层数即算力保持一致的情况下探究纯sigma分层和垂向混合分层两种分层方式对计算结果的影响。结果表明：两种垂向分层模式对海域潮位的计算精度影响不大，但对有垂向流速梯度的流场刻画会产生一定影响，在近岸海域采用sigma分层模式有利于捕捉垂向流速的变化特征;同时，纯sigma分层方案下，4 ℃最大温升包络面积约为混合分层的4倍，表明不同垂向分层模式可能会对高温升包络面积计算结果产生较为显著的影响。 |
| 英文摘要: |
| In recent years，three-dimensional mathematical models have been used more frequently to research the environmental impact of thermal drainage of power plants.The free surface of the sea fluctuates with the tide and the terrain is complex and changeable，For three-dimensional mathematical models，the vertical mesh division will affect the calculation results of flow field and temperature simulation results to some extent.This article takes a coastal nuclear power plant as an example and uses MIKE 3 software to develop a baroclinic three-dimensional hydrodynamic and thermal drainage model to explore the influence of pure sigma stratification and vertical mixed stratification on the calculation results is explored under the condition that the total number of stratification is consistent.The results show that the two vertical stratification models have little influence on the calculation accuracy of sea level，but have certain influence on the characterization of flow field with vertical velocity gradient.The sigma stratification model is beneficial to capture the variation characteristics of vertical velocity in offshore waters.Meanwhile，in the pure sigma stratification scheme，the maximum temperature rise envelope area at 4 ℃ is about 4 times that of the mixed stratification，indicating that different vertical stratification modes may have a significant impact on the calculation results of the high temperature rise envelope area. |
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