|Table of Contents|

Effects of airfoil scaling on the predicted aerodynamic performance and forcing of turbine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2018年06期
Page:
29-38
Research Field:
研究与设计
Publishing date:

Info

Title:
Effects of airfoil scaling on the predicted aerodynamic performance and forcing of turbine
Author(s):
JIANG Jinpeng1;  SHI Jingcheng1;  SU Lichao1;  GONG Fan1;  WANG Jue2
1.Science and Technology on Space Physics Laboratory, China Academy of Launch Vehicle Technology, Beijing 100076, China; 2.China Academyof Launch Vehicle Technology, Beijing 100076, China
Keywords:
airfoil scaling;  numerical simulation;  aerodynamic performance;  aerodynamic forcing
PACS:
V434+.11-34
DOI:
-
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.3D 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.

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Last Update: 2018-12-25