汽机末级静叶平衡态湿蒸汽流动数值模拟  

NUMERICAL SIMULATION OF EQUILIBRIUM WET STEAM FLOW INSIDE STATOR BLADE OF TURBINE LAST STAGE

作　　者：林智荣[1] 袁新[1] 

机构地区：[1]清华大学热能动力工程系,北京100084

出　　处：《工程热物理学报》2005年第3期417-419,共3页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展规划项目资助(No.G1999022306)国家自然科学基金资助项目(No.50076019)

摘　　要：本文对存在汽、液平衡态相变的两相流动建立了完全欧拉坐标系统下的数理模型。通过引入考虑真实流体性质的数值算法,并直接从IAPWS水及水蒸汽性质数据库中获取流体工质的性质,使数值计算的精度得到显著提高。采用包括LU-SGS-GE隐式格式和改良型高精度、高分辨率的MUSCL TVD格式的时间推进算法求解平衡态两相流动控制方程组以及低Reynolds数双方程湍流模型,对某汽轮机末级静叶进行了数值模拟,计算结果表明本文采用的模型及方法在某些条件下可以对叶栅主要性能参数进行准确的预测。A mathematic physical model of equlibrium wet steam flow was introduced under Eulerian coordinates. It considered only the process of equlibrium phase transformation. A kind of numerical method considering the real steam/water properties was applied to increase the accuracy. All of the steam/water properties were gotten from IAPWS formulas. The three-dimensional Navier-Stokes equations and the low-Reynolds-number two-equation q-ω turbulence model were solved for last stator of a turbine by using LU-SGS-GE implicit scheme and modified Higher-order, high resolution MUSCL TVD scheme. The results showed a good agreement between numerical simulation and experiment for the main performance parameter in some special situation.

关 键 词：平衡态湿蒸汽 数值模拟 两相流动 真实流体性质 

分 类 号：O35[理学—流体力学]