Design and Simulation of Radial Flow Turbine Impeller and Investigation Thermodynamic Properties of Flow in LE and TE

Aminjan, Kiumars Khani; Heidari, Milad; Rahmanivahid, Pooyan; Alipour, Houman; Khashehchi, Morteza

doi:10.18421/tem102-62

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…Many researchers, such as Lv et al [15], Aminjan et al [16], and Feng et al [17] have proposed integrated methods to analyze and design turbomachines. But these studies did not consider the presence of particles in the working fluid.…”

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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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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“…Hu et al (2020) conducted a numerical study on the performance characteristics of the stall point of the impeller in a centrifugal compressor based on the dynamic modal compression decomposition method. However, some other studies on the flow field of centrifugal impellers have also assumed negligible influence of fluid-structure interaction (Ravelet et al, 2005;Mihali c, 2014;Zhang et al, 2021;Aminjan et al, 2021;Zeng et al, 2020;Xie et al, 2018;Guo et al, 2022;Xiang et al, 2022). The unidirectional fluid-structure coupling method ignores the influence of impeller deformation on the flow field.…”

Section: Introductionmentioning

confidence: 99%

Study of flow field and vibration characteristics of supersonic centrifugal impellers based on fluid-structure interaction

Zhang

2023

HFF

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Purpose There are three purposes in this paper: to verify the importance of bi-directional fluid-structure interaction algorithm for centrifugal impeller designs; to study the relationship between the flow inside the impeller and the vibration of the blade; study the influence of material properties on flow field and vibration of centrifugal blades. Design/methodology/approach First, a bi-directional fluid-structure coupling finite element numerical model of the supersonic semi-open centrifugal impeller is established based on the Workbench platform. Then, the calculation results of impeller polytropic efficiency and stage total pressure ratio are compared with the experimental results from the available literature. Finally, the flow field and vibrational characteristics of 17-4PH (PHB), aluminum alloy (AAL) and carbon fiber-reinforced plastic (CFP) blades are compared under different operating conditions. Findings The results show that the flow fields performance and blade vibration influence each other. The flow fields performance and vibration resistance of CFP blades are higher than those of 17-4PH (PHB) and aluminum alloy (AAL) blades. At the design speed, compared with the PHB blades and AAL blades, the CFP blades deformation is reduced by 34.5% and 9%, the stress is reduced by 69.6% and 20% and the impeller pressure ratio is increased by 0.8% and 0.14%, respectively. Originality/value The importance of fluid-structure interaction to the aerodynamic and structural design of centrifugal impeller is revealed, and the superiority over composite materials in the application of centrifugal impeller is verified.

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Lightweight design of the transonic centrifugal impeller based on fluid–structure coupling

Zhang

2022

Physics of Fluids

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The impeller is the core component of the centrifugal compressor. Aiming to solve problems related to a large mass, high energy consumption, and large vibration of the existing centrifugal impeller, a semi-open supersonic centrifugal impeller provided by Krain et al. was redesigned in this paper. The redesign was based on Tsai-Wu failure theory and the two-way fluid-structure coupling method. Firstly, the geometric and numerical models were established using the geometric data found in the literature. Then, the established geometric and numerical models were verified through experimental data. Finally, the impeller was optimized from three aspects: material lightweight, composite material layering, and tip clearance. The results have shown that following the optimization, the maximum impeller stress was reduced by 48.77% when compared to the traditional 17-4PH material impeller. The maximum vibration deformation was reduced by 60.4%, as well as the resonance probability. The pressure ratio was increased by 0.8%, and the pressure and velocity reverse gradient trend near the blade tip were significantly reduced, while the flow field was more stable. The research results presented in this paper hence provide a basis for the application of composite materials in centrifugal impellers.

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Design and Simulation of Radial Flow Turbine Impeller and Investigation Thermodynamic Properties of Flow in LE and TE

Cited by 4 publications

References 20 publications

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

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

Study of flow field and vibration characteristics of supersonic centrifugal impellers based on fluid-structure interaction

Lightweight design of the transonic centrifugal impeller based on fluid–structure coupling

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