DEASM浅水流模型对热力环流的非结构网格模拟  

Unstructured Simulation of Thermal and Shallow Circulation Flow Based on DEASM Model

作　　者：邢领航[1] 严明[2] 杨文俊[1] 黄国兵[1] 

机构地区：[1]长江科学院水力学研究所,武汉430010 [2]河海大学环境科学与工程学院,南京210098

出　　处：《长江科学院院报》2011年第11期42-46,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家重点基础研究发展计划"973"项目(2007CB714106);水利行业专项研究(201001033);中央级公益性科研院所基本科研业务费(YWF0905;CKSF2010011;CKSF2011013/SL)

摘　　要：为提高热电厂的取水安全,缓解废热排放造成的环境污染,从全场精细数值模拟的角度,推导了水深平均意义下的通用显格式代数应力模型(DEASM),数值离散方法采用SIMPLE程式下的非结构网格算法,并利用改进的QUICK格式来提高对流项模拟精度。该模型成功实现了对试验下的复杂热力浅水环流的精细模拟,结果表明模型模拟的热力浅水环流的断面流速分布、局部环流流线形态、环心位置、流线分离点以及温度场分布均与实测值吻合良好,初步表明该模型能够为统一描述浅水热力环流近区和远区问题提供一种更精细而通用的全场模式。To improve the safety of water intake and alleviate the waste heat pollution from thermal power plants,a new depth-averaged turbulent model（DEASM） based on explicit algebraic Reynolds stress model is developed to describe the whole thermal shallow flow.The algorithm of the turbulent model is based on SIMPLE procedure and discretized on unstructured grid.QUICK scheme is modified to improve the precision of advective flux approximation.The numerical results show that the simulated data by the model are well consistent with the experimental data,including section velocity,circulation streamline and the geometrical centres,flow diversion point and temperature distribution.The present depth-averaged turbulent model provides a detailed and unified pattern for solving the shallow thermal flow in adjacent and distant zones.

关 键 词：热力浅水环流 DEASM SIMPLE程式 非结构网格 

分 类 号：TV131[水利工程—水力学及河流动力学]