Date:

2025-04-30

Title of Paper:

Gas-particle flows and erosion characteristic of large capacity dry top gas pressure recovery turbine

Journal:

Energy

Summary:

Based on the erosion rate model and the particle rebound model of blade material obtained through
accelerated erosion test under high temperature, systematic numerical simulations of the complex gasparticle
flows in inlet volute and cascade of a large capacity gas pressure recovery turbine are performed
in this paper. The influence of inlet volute structure and cascade channel structure on the aerodynamic
performance and erosion characteristics of turbine is first investigated. Results show that although
mixing flows and vortex flows are formed in turbine intake volute, total pressure loss of volute is less
than 0.7% because of low gas velocity. Erosion damage on the trailing edge of nozzles and rotating blades
is mainly caused by high-speed cutting behavior of ash particles. The typical inlet volute structure results
in an uneven erosion of first stage nozzles along circumferential direction. Nozzles located below the
horizontal split are mainly eroded in blade root area, while erosion distribution of nozzles located above
the horizontal split is irregular, and worse than the erosion degree of the lower half circle. Flow acceleration
characteristics and cascade circumferential structure must be comprehensively considered so as
to simultaneously improve the aerodynamic and anti-erosion performance of turbine.

Co-author:

蔡柳溪、肖俊峰，王顺森

Volume:

12

Page Number:

498-506

Translation or Not:

No

Date of Publication:

2017-02-01