Cooling design of an aero-engine fuel centrifugal pump at shut-off

Fan, Hongyu; Piao, Yun-Song

doi:10.1177/1687814017709700

Cited by 6 publications

(6 citation statements)

References 20 publications

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“…Gambit 2.4.6 [60] was used to create a structured 3D mesh model with regular hexahedron cells. Through the calculation, it was found that the simulation could not converge when the number of cells was higher than 20,000 (the author tried to see whether the simulation converged by reducing the number of cells.…”

Section: Geometric Modelsmentioning

confidence: 99%

Improved die assembly for gas‐assisted sheet extrusion using different up and down gas layer thicknesses

Jiang

Liu

Huang

et al. 2021

Polymer Engineering & Sci

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Gas-assisted sheet extrusion is a promising and environment-friendly method used in polymer processing. Insufficient gas intake due to the adherence of the polymer melt to the inlet gap is a disadvantage of the method. Therefore, in this study an improved die assembly with parallel gas intake was designed. As the melt is prone to falling at the die exit during the horizontal extrusion process, different thickness settings are used for the up and down gas layers (0.25 and 0.75 mm, respectively) to avoid this. For the improved die assembly, the gas inlet pressure may be varied systematically to study the mechanism of stable sheet extrusion. When the gas inlet pressure is 0.1 MPa, the melt can be extruded smoothly, and the extruded sheet surface is transparent and flat. However, when the optimum pressure is exceeded, the extruded sheet becomes twisted or even broken.

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Section: Geometric Modelsmentioning

confidence: 99%

Improved die assembly for gas‐assisted sheet extrusion using different up and down gas layer thicknesses

Jiang

Liu

Huang

et al. 2021

Polymer Engineering & Sci

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show abstract

“…The relationships between rotors and stators were analyzed (Zhu et al, 2011), the rotor stabilization itself (Steinbrecher et al, 2003), pump performance under normal and cavitation conditions (Mousmoulis et al, 2021), and critical velocities during pump operation were also analyzed (Song, Zhang & Zhang, 2022). Many other valuable analyzes were also performed (Barmaki & Eghaghi, 2019;Fan & Piao, 2017). In all of such studies, the focus was on numerical analysis.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Analysis of a Centrifugal Pump With Different Rotor Geometries

Semkło

GIERZ²

2022

acs

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The paper presents a comparative analysis of the operation of two variants of centrifugal pump rotors, a description of the main parameters, and the influence of the blade geometry on the performance characteristics obtained. Rotors have been designed using the arc and point method. Based on the developed 3D CAD models, the rotors were printed using the rapid prototyping method on a 3D printer in FFF (Fused Filament Fabrication) technology, in order to experimentally verify the performance, by placing them on the Armfield FM50 test stand. The analysis part of the CFD includes a fluid flow in Ansys Fluent. The process of creating a flow domain and generating a structural mesh was described, along with the definition of boundary conditions, the definition of physical conditions and the turbulence model. The distribution of pressures and velocities in the meridional sections is shown graphically. The chapter with the experimental analysis contains a description of the measuring stand and the methodology used. The results obtained made it possible to generate the characteristics, making it possible to compare the results received. The results allowed to note the influence of geometry on the behavior of the rotors during operation in the system and to indicate that the arc rotor gets a 7% higher head and 2% higher efficiency than the point method rotor, which gives the basis for its commercial use in industry.

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“…Nowadays, with the development of science and technology, the pump, especially the centrifugal pump, has been an indispensable power machine everywhere we can see, applied widely in agriculture, aerospace, water conservancy engineering, nuclear industries, and medical treatment [1][2][3]. In this era background, more and more scholars at home and abroad focus on the experiment and research of centrifugal pumps.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Unsteady Flow Characteristics of Centrifugal Pump under Part Load Based on DDES Turbulence Model

Tang

Liu

Zhao

et al. 2021

Shock and Vibration

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To better reveal the mechanism of the rotor-stator interference between the impeller and the guide vane and the evolution process of the stall vortex under the part-load conditions, numerical simulation is carried out based on the DDES turbulence model, which can better capture vortex structure. And the pressure pulsation and the radial velocity distribution of the centrifugal pump are studied. The vortex structure and pressure fluctuation of pump internal flow field under part-load condition of Q = 0.4 Qdes are mainly analyzed. The analysis results show that the stall vortex is formed at the inlet of the impeller and evolves to the outlet of the impeller, the front cover to the rear cover according to the fluid flow direction, and then disappears. Besides, under the part-load condition, the vorticity of the impeller outlet is always obviously less than that of the impeller inlet as the flow rate increases. Due to the asymmetric action of the volute, the radial velocity distribution law of flow channel C1 is different from other flow channels at different blade heights. By analyzing the radial velocity, the phenomenon that the jet-wake flow impacts the guide vane with the rotation of the impeller is the main reason for the rotor-stator interference. And large radial velocity gradients appear at the front and rear cover plates, which will cause high energy loss and reduce pump efficiency. Besides, the conclusion can be drawn that the region with the strongest rotor-stator interference is the inlet region of the guide vane suction surface. It also occurs near the volute tongue but is lower due to the effect of the guide vane. This research may serve as a reference for the safe operation of centrifugal pumps under part-load conditions.

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Cooling design of an aero-engine fuel centrifugal pump at shut-off

Cited by 6 publications

References 20 publications

Improved die assembly for gas‐assisted sheet extrusion using different up and down gas layer thicknesses

Improved die assembly for gas‐assisted sheet extrusion using different up and down gas layer thicknesses

Numerical and Experimental Analysis of a Centrifugal Pump With Different Rotor Geometries

Analysis of Unsteady Flow Characteristics of Centrifugal Pump under Part Load Based on DDES Turbulence Model

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