Yuling Liu

Research Field

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Computational fluid dynamics for the influence of cross-sectional configuration on the hydraulic characteristics in an oxidation ditch

Desalination and Water Treatment (2024)

Yuling Liu Shangxiao Qiao Dongxu Li

Oxidation ditch (OD) as a widely used process in wastewater treatment plants (WWTPs) usually produces low-flow zones at the ditch bottom, which leads to potential sludge deposition. In response to this issue, this study optimized the rectangular cross-section of the OD by proposing a U-shaped configuration, and used the numerical simulation method (Flunet 6.3.26) to simulate the hydraulic characteristics in the OD with the two types of cross-section. Comparative analysis of the simulated flow field structure and gas-phase distributions between the rectangular and U-shaped cross-sections indicates that the "U-shaped" OD exhibits superior hydraulic characteristics, and can provide a foundation for further advancements in OD design.

Oxidation ditch

10.1016/j.dwt.2024.100498

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Numerical calculation and experimental verification of subtransient- and transient reactances of a pumped storage machine

Energy Reports (2022)

Shukuan Zhang Hongge Zhao Xiaoning Ma Zhongbo Wang Yuling Liu

The subtransient reactance Xd′′ and transient reactance Xd′ of large-capacity alternators are crucial parameters to determine the fault current magnitude and design the protection system for the machine. The traditional calculation method of Xd′′ and Xd′ will bring errors in the graphical decomposition process which depends on the subjective judgement of different individuals, and the analytical method is also inherently imprecise. In this paper, the superconductor simulation method (SSM) incorporated with field-circuit coupled finite element model is presented. The SSM has high accuracy and is capable of considering the saturation effect, skin effect and arbitrary structure of the machine. The unsaturated and saturated values of Xd′′ and Xd′ of a pumped storage machine are calculated with the proposed SSM. The method of establishing the field-circuit coupled model, governing equations and the superconductor simulation method are introduced in detail. The short-circuit test is conducted on the real machine and the calculated results of both Xd′′ and Xd′ are verified by the measured values.

Reactance

Transient (computer programming)

Experimental data

Transient analysis

10.1016/j.egyr.2022.05.270

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Citations (2)

A reagent scheme for galena/sphalerite flotation separation: Insights from first-principles calculations

Minerals Engineering (2021)

Limin Zhang Jiande Gao Sultan Ahmed Khoso Li Wang Yuling Liu

Sulfide Minerals

10.1016/j.mineng.2021.106885