Experimental and numerical studies on rebound characteristics of non-spherical particles impacting on stainless-steel at high temperature

Cai, Liuxi; Wang, Shunsen; Li, Yun; Mao, Jing-ru; Li, Fang; Liu, Ze-Kun; Gao, Jie

doi:10.1016/j.powtec.2020.12.004

Cited by 14 publications

(3 citation statements)

References 16 publications

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“…In the high-temperature erosion experiment, erosion test under different impingement parameter conditions are conducted, the detailed working principle of the experiment can be referenced in our previous work. 32 The obtained erosion rate of blade material is then correlated with T, β and V through step-by-step least squares fitting method, and the results are show in equations (6)–(8). …”

Section: Methodsmentioning

confidence: 99%

“…In this study, the particle rebound model employed are established based on the Particle Image Velocimetry (PIV) statistical results of particle incident velocity field and rebound velocity field. 32 During the experiment, we ensured that the original images captured and the processed particle velocity field are of high quality through relevant technical measures (details can be found in literature 32 ). According to the statistical analysis of the test results of a large number of particle velocity fields, it is found that the uncertainty of particle velocity magnitude and direction is <2% and 1°, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Study on the solid particle erosion characteristic of top gas pressure recovery turbine under variable working condition

Cai

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Aiming at the problem of particle erosion in top gas pressure recovery turbines, the physical and chemical properties of the sampled gas dust particles are tested in this paper, and particle motion behavior and erosion characteristics in the turbine cascade are investigated by employing a validated numerical method. On this basis, the influence mechanism of adjustable stator angle and rotate speed on the erosion characteristics of blades under variable working conditions is quantitatively explored. Results show that the erosion damage of the first-stage stator S1 and rotor R1 are mainly initiated by particles with different size. The change of adjustable stator angle will change the load and gas enthalpy drop distribution of the cascade, which then affects the impingement velocity and position of the particles. When adjustable stator angle reduces from 44.2 to 25% opening, erosion of S1 trailing edge grows about 20%, while the erosion of R1 trailing edge reduces by 50%. The change of rotating speed will change the relative magnitude of the particle centrifugal force and airflow drag force, which in turn affects the particle’s trajectory and impingement velocity. When rotate speed increases from 3,000 to 4,500 r/min, both the particle impingement velocity and escape rate increase, resulting in doubling of the erosion on blade leading edge and halving of the erosion on blade trailing edge. Finally, for the high rotation speed TRT operating under variable working conditions, some insightful suggestions are given to minimize the erosion damage of the turbine blades.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Study on the solid particle erosion characteristic of top gas pressure recovery turbine under variable working condition

Cai

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

Self Cite

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“…The particle size of quartz sand in the experiment is in the range of 1∼45 μm, and the specific details and steps of the experiment can be found in the literature. 32 The least squares fitting method was used to fit the experimental results of particle incidence velocity, rebound velocity and particle incidence angle. The expressions of the tangential velocity recovery coefficient e T and normal velocity recovery coefficient e N for quartz sand particles impacting the coating material were obtained as follows.where β represents the particle incidence angle and is measured in radians.…”

Section: Correction and Validation Of Particle Deposition And Removal...mentioning

confidence: 99%

Numerical analysis of catalyst particle deposition characteristics in a flue gas turbine with an improved particle motion and deposition model

Cai

Yao

Hou

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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To more accurately understand and predict the deposition behavior of catalyst particles in the flue gas turbine cascade, test and numerical combined study is performed in this paper. Based on the systematic analysis of the deposition process and physical mechanism of the catalyst particles, the traditional DRW model, critical velocity particle deposition model and removal model were corrected with the user defined function custom function and validated with the actual deposition morphology. On this basis, the effects of the particle Stokes number and flue gas parameters on the particle deposition characteristics of the flue gas turbine cascade were detailed investigated. The results show that the revised DRW model, critical velocity and removal model can more accurately predict the deposition location and deposition rate of particles in the turbine cascade. With the increase in the Stokes number of particles, the average particle impact rate on the blade surface gradually increased, while the average deposition rate showed a trend of first increasing and then decreasing. The average deposition rate of particles in the rotor blade surface is roughly twice as high as that in the stator surface. With the increase of the flue gas expansion ratio, the deposition rate of particles less than 3 μm gradually increases, while the deposition rate of particles greater than 3 μm tends to decrease. In addition, the change in the flue gas expansion ratio has no obvious effect on the particle deposition distribution in different size ranges.

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Numerical investigation of collision characteristics of non-spherical particles on ductile surfaces under normal impact

Tarodiya,

Levy

2024

Comp. Part. Mech.

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Experimental and numerical studies on rebound characteristics of non-spherical particles impacting on stainless-steel at high temperature

Cited by 14 publications

References 16 publications

Study on the solid particle erosion characteristic of top gas pressure recovery turbine under variable working condition

Study on the solid particle erosion characteristic of top gas pressure recovery turbine under variable working condition

Numerical analysis of catalyst particle deposition characteristics in a flue gas turbine with an improved particle motion and deposition model

Numerical investigation of collision characteristics of non-spherical particles on ductile surfaces under normal impact

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