火箭推进2018，Vol.44Issue(6)：29-38,10.
叶型尺寸比例变化对预测涡轮气动性能和气动力的影响(英文)
Effects of airfoil scaling on the predicted aerodynamic performance and forcing of turbine
姜金朋 1石竟成 1苏立超 1巩帆 1王珏2
作者信息
- 1. 中国运载火箭技术研究院 空间物理重点实验室, 北京 100076
- 2. 中国运载火箭技术研究院, 北京 100076
- 折叠
摘要
Abstract
Effects of vane/blade airfoil scaling on the prediction of aerodynamic performance and unsteady forcing have been investigated for the turbine. A single-stage axial-flow turbine with 18 vanes and 32 blades was adopted. 3 D steady and unsteady simulations were conducted for configurations with different scaling factors, and the full-scale case was used as the baseline simulation. The results show that the vane/blade airfoil scaling has little influence on the steady and time-averaged pressure on the blade and performance of turbine. The predicted deviation is below 2％ even if the scaling deviation exceeds 10％. The fast Fourier transform (FFT) is used to transform the unsteady pressure and forcing predicted in the time domain to obtain the characteristics in the frequency domain. The vane/blade airfoil scaling has little difference on the frequency characteristics of unsteady pressure and aerodynamic forces, while amplitude is greatly affected. The results show that the predicted amplitude deviation is not directly related to the scaling deviation, but the case with small scaling deviation (3. 125％ in this study) indeed shows relatively stable and minor error.关键词
叶型比例变化/数值模拟/气动性能/气动力Key words
airfoil scaling/numerical simulation/aerodynamic performance/aerodynamic forcing分类
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姜金朋,石竟成,苏立超,巩帆,王珏..叶型尺寸比例变化对预测涡轮气动性能和气动力的影响(英文)[J].火箭推进,2018,44(6):29-38,10.
