摘要
利用多种测试技术和试验方法解决了模拟超常气固两相流动过程中的一些特殊问题,较系统地进行了常温到610℃、粒子冲击速度从220m/s到450m/s及冲击角从15°到90°条件下氧化铁粒子对两种汽轮机叶片材料抗固粒冲蚀磨损能力的对比性试验研究。研究发现两种叶片材料都呈现出塑性材料的冲蚀特性,最大冲蚀率发生在冲击角约25°和20°处;两种叶片材料冲蚀率的速度指数为2．8～3．0和2．25～2．55,且随温度的变化特性相反。
Some measuring and testing techniques were used to resolve problems during simulating supernormal gas-solid two-phase flow. The erosive wear of two steam turbine blade material samples was studied experimentally by exposing them to a ferric oxide particle-laden flow at temperatures from ambient to 610℃, particle impact velocities from 220 to 450 ms^-1 and impingement angles from 15° to 90°. The results indicate the ductile behavior of two blade materials, with the maximum erosion rate at about 25° and 20° impingement angle. The erosion rate for two blade materials is proportional to the particle impact velocity to the power 2.8-3.0 and 2.25-2.55 and it varies oppositely with rise in temperature.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第4期622-624,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.50476051)
关键词
气固两相流
固粒冲蚀
塑性材料
冲蚀率
gas-solid two-phase flow
solid particle erosion
plastic material
erosion rate
