Performance evaluation on radial turbines with potential working fluids for space closed Brayton cycle

Yuan, Ze; Zheng, Qun; Yue, Guoqiang; Jiang, Yuting

doi:10.1016/j.enconman.2021.114368

Cited by 15 publications

(6 citation statements)

References 27 publications

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“…A study by Zhdanov et al (2013) compared several axial turbine loss correlations and the results showed that Traupel's model (Traupel, 1977) is capable of predicting turbine efficiency with an accuracy of ±1.5%. This accuracy level is similar to many commonly used loss correlations.…”

Section: Methods Primary Loss Modellingmentioning

confidence: 99%

Profile loss and turbulence modelling in radial outflow turbine cascades

Tomovska,

Grönman,

Turunen-Saaresti

2023

European Conference on Turbomachinery Fluid Dynamics and Thermodynamics

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Radial outflow turbines (ROTs) offer an alternative to single-stage high-work axial turbines, for example, in steam and organic Rankine cycle applications. Previous studies have shown that axial turbine loss correlations tend to over-predict losses in comparison with numerical data. However, only part of the most used loss correlations has so far been subjected to analysis while, additionally, the effect of turbulence modelling has not been widely covered in the open literature exploring ROTs. This study, therefore, examines the accuracy of a particular loss model known as Traupel's model on ROT profile loss prediction by comparing it with validated numerical simulations. In addition, the effects of different turbulence models on the flow fields are studied in detail. In doing so, this research shows that Traupel's model tends to over-predict loss. Crucially, the turbulence modelling approach is found to affect results significantly, which mainly originate from differences in the boundary layer and turbulence predictions.

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Section: Methods Primary Loss Modellingmentioning

confidence: 99%

Profile loss and turbulence modelling in radial outflow turbine cascades

Tomovska,

Grönman,

Turunen-Saaresti

2023

European Conference on Turbomachinery Fluid Dynamics and Thermodynamics

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“…Yuan et al conducted a design study on radial turbines applied to closed Brayton cycles in space [54]. The working performance of four different working fluids (helium-xenon, helium, argon, and air) in radial turbines was analyzed.…”

Section: [Insert Figure 10 Here]mentioning

confidence: 99%

Research and Development of Helium-Xenon Brayton Cycle Technology: a Review

Chen,

Song,

Qian

et al. 2024

NSO

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“…Particle Stokes number is a function of particle diameter and density, it is defined as St = τp/τf in Eqs. ( 6) and (7) and is used to describe the ability particle entrainment carried by the gas phase (Fra et al, 2020).…”

Section: Influence Of Particle Diameter On Performance Of Radial Turbinementioning

confidence: 99%

“…In a CBC as shown in Fig. 1 [7][8][9][10], working fluid is compressed to high pressure in compressor and is heated to high temperature in heater. Then, energy of fluid is converted into power in turbine [11].…”

Section: Introductionmentioning

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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Performance evaluation on radial turbines with potential working fluids for space closed Brayton cycle

Cited by 15 publications

References 27 publications

Profile loss and turbulence modelling in radial outflow turbine cascades

Profile loss and turbulence modelling in radial outflow turbine cascades

Research and Development of Helium-Xenon Brayton Cycle Technology: a Review

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

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