摘要
采用由Menter提出的实质为k-ω模型发展而来的两个双方程湍流模型BaselineModel(BSL)及ShearStressTransportModel(SST),通过求解三维粘性可压缩Favre平均N-S方程,对一个典型舰船燃气轮机四级动力涡轮进行了三维粘性流动数值模拟的对比计算,其中动静叶间隙未作轴向延伸和采用"混合平面"方法传递级间参数,而且两种方案的计算结果均与可以利用的设计参数总体符合良好.三维数值模拟不仅清晰揭示了舰船燃气轮机动力涡轮的流场结构,而且表明子午型面技术和先进"后部加载"叶型的组合设计是其具有优良气动性能的主要原因.
Baseline (BSL) model and shear stress transport (SST) model, which are the most advanced two-equation eddy-viscosity turbulence models in engineering applications that have been developed from the original k-ω model by Menter, are applied to a numerical simulation of 3-D viscous flow through the four-stage power turbine for the marine gas turbine. The flow is considered steady relative to each blade row individually and the rows communicate via inter-blade-row mixing planes.The computational results are in good agreement with the available design data. Within a multistage environment the computational results reveal the complex flow structures of the turbine. And the results indicate that the combined designs of the meridional passage and the aft loading profile are the most important technology to the power turbine with high aerodynamic performance.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2003年第6期617-621,共5页
Journal of Harbin Engineering University
基金
海军装备预研项目(40101030104).
关键词
三维粘性流动
BSL及SST模型
数值分析
后部加载技术
舰船动力涡轮
three-dimensional viscous flow
BSL and SST two-equation turbulence models
numerical analysis
aft loading technology
power turbine for marine gas turbine
