涡轮叶片气热耦合壁温及压力分布计算与分析
Conjugate heat transfer simulation and analysis of wall temperature and pressure distribution on a turbine blade
李卓轩 1沙云东 1骆丽1
作者信息
- 1. 沈阳航空航天大学 辽宁省航空推进系统先进测试技术重点实验室,沈阳 110136
- 折叠
摘要
针对气冷涡轮叶片建立了耦合分析数值模拟计算平台,采用气热耦合的方法,对径向气冷MARK Ⅱ 型叶片进行三维气热耦合数值模拟.分析了该内冷涡轮叶片的多场耦合特性,并将计算结果与试验值进行对比.对比结果表明:湍流模型的选择影响叶片表面的温度分布,但对叶片表面压力分布影响较小;在选择的6种湍流模型中,SSTk-ω湍流模型对该流场状态模拟的效果较好,叶片表面温度和压力与试验结果最接近,满足工程上的计算要求.考虑涡轮进口总温径向不均匀时,会在叶片尾缘形成局部高温区,增加了叶身的温度梯度,可适当改进冷却方式,以提高叶片强度.
Abstract
Established a coupling analysis numerical simulation platform for air-cooled turbine blades,and a three-dimensional conjugate heat transfer numerical simulation for radial air-cooled MARK II blades was carried out using the conjugate heat transfer method.The multi-field coupling characteris-tics of the air-cooled turbine blades were analyzed,and the numerical results were compared with the experimental results.The results show that the choice of turbulence model affects the temperature distri-bution but has little influence on the pressure distribution on the blade surface;Among the six turbu-lence models selected,the SST k-ω turbulence model can simulate the flow field better,and the tem-perature and pressure on blade surface are the closest to the test results,which meets the engineering calculation requirements.When the total temperature at the turbine inlet is non-uniform in the radial di-rection,a local high-temperature zone is formed at the trailing edge of the blade,which increases the temperature gradient on the blade.Therefore,the cooling method can be improved to enhance the blade strength.
关键词
涡轮叶片/气热耦合/流场结构/数值仿真/湍流模型Key words
turbine blade/conjugate heat transfer/flow field structure/numerical simulation/turbu-lence model引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据