Impingement on blade surface by fine particles with high velocity is commonly seen in steam turbines, gas turbines and compressors, which affect the service life and reliability of the equipment. Study on particles’ rebound characteristics is of great significance to reduce the blade erosion and to control particle trajectory. Based on the nonlinear explicit dynamics analysis software ANSYS/LS-DYNA, the impacts of fine spherical particles with different diameters (20 to 500μm) on a typical martensitic stainless steel (AISI 403) target with high velocity (50 to 250m/s) have been systematically studied. The influences of incident velocities, impact angles, particles sizes on its rebound characteristics, relative impact depth, and relative dissipated energy have been analyzed. Results show that velocity restitution coefficient e decreased with the impact angle β1, the incident velocity V1, and the particle size dp. However, the role of particle size on the velocity restitution coefficient seemed to be far less than that of the other two factors. Both of particle’s tangential and normal velocity coefficient of restitution declined with the increasing impact angle in most cases. However, when the incident velocity V1 = 200m / s and the impact angle β1 > 45°, the tangential velocity restitution coefficient et of 100 μm and 200 μm particles increased with the increase in the impact angle β1. The reason might be that the relative impact depth drel was located a zone ranged from 0.1515 to 0.1677, where the tangential rebound behavior could be enhanced. Most of the variation of the tangential and normal velocity restitution coefficient along β1 decreased with the increase in the particle diameter. However, when V1 = 200m/s and β1 > 15°, the tangential reflected velocity of the larger particles was enhanced gradually. In addition, the values of the relative impact depth drel increased with the increasing impact angle and incident velocity, and it increased with the increasing particle diameter in most cases. The relative dissipated energy of particles steadily increased with the impact angle and incident velocity, respectively. Particle diameter had little effect on energy dissipation in comparison with the impact angle and incident velocity.
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ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
June 15–19, 2015
Montreal, Quebec, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5679-6
PROCEEDINGS PAPER
Study on Rebound Characteristics of Fine Spherical Particles Impacting an AISI 403 Steel With High Velocity
Shun-sen Wang,
Shun-sen Wang
Xi’an Jiaotong University, Xi’an, China
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Liu-xi Cai,
Liu-xi Cai
Xi’an Jiaotong University, Xi’an, China
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Shang-fang Cheng,
Shang-fang Cheng
Xi’an Jiaotong University, Xi’an, China
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Chuang Wu
Chuang Wu
Xi’an Jiaotong University, Xi’an, China
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Juan Di
Xi’an Jiaotong University, Xi’an, China
Shun-sen Wang
Xi’an Jiaotong University, Xi’an, China
Liu-xi Cai
Xi’an Jiaotong University, Xi’an, China
Shang-fang Cheng
Xi’an Jiaotong University, Xi’an, China
Chuang Wu
Xi’an Jiaotong University, Xi’an, China
Paper No:
GT2015-43058, V008T26A025; 14 pages
Published Online:
August 12, 2015
Citation
Di, J, Wang, S, Cai, L, Cheng, S, & Wu, C. "Study on Rebound Characteristics of Fine Spherical Particles Impacting an AISI 403 Steel With High Velocity." Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines. Montreal, Quebec, Canada. June 15–19, 2015. V008T26A025. ASME. https://doi.org/10.1115/GT2015-43058
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