Experimental investigation on the water droplet erosion characteristics of blade materials for steam turbine

被引：10
|
作者：
Zhang, Zheyuan [1 ]
Yang, Bin [1 ]
Zhang, Di [2 ]
Xie, Yonghui [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, State Key Lab Strength & Vibrat Mech Struct, Xian, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Energy & Power Engn, MOE Key Lab Thermofluid Sci & Engn, Xian, Peoples R China
来源：
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE | 2021年 / 235卷 / 20期
关键词：
Water droplet erosion; ASTM-G73; cumulative erosion curves; velocity coefficients; SEM morphology; IMPACT; IMPINGEMENT; RESISTANCE; MECHANISMS;
D O I：
10.1177/0954406220979730
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
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.
引用
收藏
页码：5103 / 5115
页数：13
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