The influence of governing valve opening on the erosion characteristics of solid particle in steam turbine

Cao, Lihua; Liu, Shuang; Hu, Pengfei; Si, Hu

doi:10.1016/j.engfailanal.2020.104929

Cited by 20 publications

(4 citation statements)

References 18 publications

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“…In a hydraulic transport system, valves assume an important function of regulating the pressure and the flow rate, which is pivotal for ensuring reliable and safe operation of the whole system [71][72][73][74][75]. The direct interaction between solid particles and the components of the valve results in wear of the components, which can give rise to safety issues such as sealing failure and decline in the operating efficiency.…”

Section: Valvesmentioning

confidence: 99%

Erosive Wear Caused by Large Solid Particles Carried by a Flowing Liquid: A Comprehensive Review

Kang,

Li,

Teng

et al. 2024

Processes

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The erosive wear encountered in some industrial processes results in economic loss and even disastrous consequences. Hitherto, the mechanism of the erosive wear is not clear, especially when the erosive wear is caused by large particles (>3.0 mm) carried by a flowing liquid. Current approaches of predicting erosive wear need improvement, and the optimization of relevant equipment and systems lacks a sound guidance. It is of significance to further explore such a subject based on the relevant literature. The present review commences with a theoretical analysis of the dynamics of large particles and the fundamental mechanism of erosion. Then the characteristics of the erosion of various equipment are explicated. Effects of influential factors such as particle size and properties of the target material are analyzed. Subsequently, commonly used erosion models, measurement techniques, and numerical methods are described and discussed. Based on established knowledge and the studies reported, some expectations for future work are proposed.

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Section: Valvesmentioning

confidence: 99%

Erosive Wear Caused by Large Solid Particles Carried by a Flowing Liquid: A Comprehensive Review

Kang,

Li,

Teng

et al. 2024

Processes

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“…Trajectories of large particles are close to a straight line, and small particles mainly flow with the mainstream. In addition, Cao [24] and Roa [25] adopted steam turbines and water turbines as research objects respectively, and found that erosion rate is related to particle diameter and mass fraction of particles.…”

Section: Figure 1 Process Of Closed Brayton Cyclementioning

confidence: 99%

Effect of Carbon Particles on Aerodynamic Performance of a Radial Inflow Turbine in Closed Brayton Cycle

2023

Teh. vjesn.

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For the closed Brayton cycle using carbon heaters, working fluid contains some solid particles generally. These impurities will enter turbine along with gas, influence aerodynamic performance, and even make turbine work under off-design condition. Therefore, it is necessary to study the influence of particles on turbine. In this paper, a turbine using argon with carbon particles as working fluid is investigated. Particles are assumed to have no volume and are evenly divided into ten different sizes. Based on the discrete phase model (DPM), CFD method is adopted to simulate turbine flow field, and influences of carbon particle mass fraction, particle diameter and incident velocity on aerodynamic performance are analyzed. The results indicate that as particle mass fraction increases, total pressure, static pressure and Mach number decrease significantly, isentropic efficiency decreases slightly, while temperature increases. Collision and rebound of particles in flow field are more intense with a larger particle diameter, but flow field is less influenced under the same mass fraction due to decrease of particle number. Incident velocity has little effect on aerodynamic performance; however, with increase of incident velocity, diameter of particles on blade surface is larger and collision of particles is more intense especially in nozzle. These results will help understand the influence of solid particles on turbines.

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“…As with the environment of the two-blade pump, the impact velocity, the angle of the interaction between particles, and the wall in the flow field, are three parameters, without considering other parameters and factors. The expression of this is shown in Equations ( 1) and ( 2) [27]:…”

Section: Biological Characteristics Analysismentioning

confidence: 99%

Effect of the Bionic Circular Groove Non-Smooth Structure on the Anti-Wear Performance of the Two-Vane Pump

Yan

et al. 2022

Lubricants

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The characteristics of the material transported by the two-vane pump can cause the impeller to wear out, leading to a deterioration in hydraulic efficiency. Appropriately, the research goal of this paper is to consolidate the anti-wear performance of the two-vane pump conveying a solid-liquid two-phase flow. Based on the bionic principle and the anti-wear structure of blood clams, the circular non-smooth structure adapted from blood clams is arranged in the wear-prone area. Through numerical simulation, we compare the main indexes of the pump: the head, the pressure distribution, the vortex pressures, and the average wear rate, to reveal the wear resistance mechanism of circular non-smooth structures. The results illustrate that the use of a circular non-smooth structure does not modify the external characteristics of the pump; the pressure distribution inside the impeller is similarly consistent, and the vortex pressures are all approximately the same. The average wear rate is higher when the diameter of the circular non-smooth structure is either 0.25 mm or 0.30 mm, and the simulation results are poor. At a diameter of 0.20 mm, the average wear rate of circular non-smooth blades is at its lowest point. The circular non-smooth surface structure causes impurities to be “caught” by the vortex zone and not freely struck against the wall, resulting in the particles migrating away from the blade.

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The influence of governing valve opening on the erosion characteristics of solid particle in steam turbine

Cited by 20 publications

References 18 publications

Erosive Wear Caused by Large Solid Particles Carried by a Flowing Liquid: A Comprehensive Review

Erosive Wear Caused by Large Solid Particles Carried by a Flowing Liquid: A Comprehensive Review

Effect of Carbon Particles on Aerodynamic Performance of a Radial Inflow Turbine in Closed Brayton Cycle

Effect of the Bionic Circular Groove Non-Smooth Structure on the Anti-Wear Performance of the Two-Vane Pump

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