TY - JOUR
T1 - Experimental investigation on the water droplet erosion characteristics of blade materials for steam turbine
AU - Zhang, Zheyuan
AU - Yang, Bin
AU - Zhang, Di
AU - Xie, Yonghui
N1 - Publisher Copyright:
© IMechE 2020.
PY - 2021/10
Y1 - 2021/10
N2 - In this paper, the water droplet erosion (WDE) characteristics of four blade materials under different high-speed liquid-solid impingement conditions are tested with the experimental steps and data processing methods in ASTM-G73. On the basis of cumulative erosion curves, the maximum erosion rate (ERmax) is obtained to analyze the WDE resistance of the testing materials quantitatively. The effects of target surface roughness, impact angle and impact velocity on the WDE characteristics of blade materials under specific working conditions are studied. The velocity coefficients (n) of the testing materials under high-speed liquid-solid impact are analyzed. In order to investigate the mechanism of WDE, the material failure characteristics and shallow layer hardness (SLH) at three characteristic moments corresponding to different WDE periods, are investigated with the SEM morphology of erosion section and hardness distribution along the depth direction at the impact position. The research results can provide reference data and technical support for the structure design and material selection of steam turbine blades.
AB - In this paper, the water droplet erosion (WDE) characteristics of four blade materials under different high-speed liquid-solid impingement conditions are tested with the experimental steps and data processing methods in ASTM-G73. On the basis of cumulative erosion curves, the maximum erosion rate (ERmax) is obtained to analyze the WDE resistance of the testing materials quantitatively. The effects of target surface roughness, impact angle and impact velocity on the WDE characteristics of blade materials under specific working conditions are studied. The velocity coefficients (n) of the testing materials under high-speed liquid-solid impact are analyzed. In order to investigate the mechanism of WDE, the material failure characteristics and shallow layer hardness (SLH) at three characteristic moments corresponding to different WDE periods, are investigated with the SEM morphology of erosion section and hardness distribution along the depth direction at the impact position. The research results can provide reference data and technical support for the structure design and material selection of steam turbine blades.
KW - ASTM-G73
KW - SEM morphology
KW - Water droplet erosion
KW - cumulative erosion curves
KW - velocity coefficients
UR - https://www.scopus.com/pages/publications/85097897327
U2 - 10.1177/0954406220979730
DO - 10.1177/0954406220979730
M3 - 文章
AN - SCOPUS:85097897327
SN - 0954-4062
VL - 235
SP - 5103
EP - 5115
JO - Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
JF - Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
IS - 20
ER -