摘要
为了解某民用发动机5级低压涡轮的气动设计特点,利用全三维计算流体动力学(CFD)软件CFX 12.0对带冷气的某5级低压涡轮进行了全三维计算,湍流模拟采用带转捩的SST(shear stress trans-port)二方程模型,并使用源项模拟技术考虑冷气的影响.计算结果与试验结果进行了对比,结果表明该涡轮叶片均采用前加载或均匀加载的设计方法,流道中气流为全亚声速流动;亦表明了CFX软件对气动流场的模拟具有较高的精度.计算结果为先进民用航空发动机涡轮设计提供一定的参考和借鉴.
In order to understand the five-stage LPT （low pressure turbine） aerodynam- ic design characteristic, full three-dimensional simulation of the five-stage LPT was conduc- ted by the CFD （computational fluid dynamics） software CFX12.0. Three-dimensional Reynolds averaged N-S （Navier-Stokes） equations with SST （shear stress transport） turbu- lence model were used to predict the LPT internal flow. The results were compared with the experimental data. It is proved that the turbine blades are all designed by fore-loaded or uni- form-loaded, and the CFX has high precision on simulating aerodynamic flowfield. Besides, the results provide some references for civil aerial-engine turbine design.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2012年第7期1441-1447,共7页
Journal of Aerospace Power
关键词
民用发动机
低压涡轮
SST湍流模型
转捩
亚声速
civil engine
low pressure turbine
SST （shear stress transport） turbulence model
transition
subsonic
