Internal Flow and Cavitation Analysis of Scroll Oil Pump by CFD Method

Tian, Sugen; Zhao, Yuanyang; Liu, Guangbin; Yang, Qinwen; Li, Liansheng

doi:10.3390/pr9101705

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…Based on the results of the experimental simulation, they analyzed and proposed a new model that is suitable for laminar, turbulent, and cavitation flow. Tian et al [19] established a three-dimensional model of a scroll oil pump with actual clearance and found that the flow in the two working chambers was asymmetric. The author effectively improved pressure pulsation by increasing the axial clearance and reducing the rotational speed and proposed a method to reduce pressure pulsation by shortening the vortex profile.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump

Zhou,

Cui,

Xiao

et al. 2023

Energies

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Using the RNG k-ε turbulence model and a full cavitation model, this study numerically simulated cavitating flow-induced pressure fluctuations in a gerotor pump and analyzed the relationship between cavitating flow and pressure fluctuations. The results demonstrate that, as the inlet pressure decreases, the cavitation phenomenon in the gerotor pump intensifies, and the cavitation range in the rotor increases. Some of the vapor even spreads into the oil inlet groove, leading to high vapor content in the chamber that is in contact with the oil inlet groove. The pressure fluctuation characteristics of the flow field in the pump exhibit evident periodic changes. Under different cavitation conditions, the pressure fluctuation amplitude at the monitoring point decreases with increasing inlet pressure, whereas the main frequency of pressure fluctuation remains unaffected by cavitation conditions. The pressure fluctuation amplitude is the strongest at point O1 of demarcation between the low-pressure and high-pressure zones in the chamber, and the volume between the oil inlet groove and the oil outlet groove serves as the main vibration source in the rotor pump. To ensure the stable and efficient operation of the gerotor pump, it is recommended to operate it at a larger NPSH.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump

Zhou,

Cui,

Xiao

et al. 2023

Energies

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Therapeutic Smart Insole Technology with Archimedean Algorithmic Spiral Triboelectric Nanogenerator-Based Power System and Sensors

Mensah,

Liao,

Amesimeku

et al. 2024

Adv. Fiber Mater.

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Analysis of Tangential Leakage Flow Characteristics of Oil-Free Scroll Expander for a Micro-Scale Compressed Air Energy Storage System

Sun

Peng

Zhu

et al. 2023

Entropy

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Tangential leakage loss is the primary factor that significantly affects the output performance of oil-free scroll expanders. A scroll expander can function under different operating conditions, and the flow of tangential leakage and generation mechanism is different. This study employed computational fluid dynamics to investigate the unsteady flow characteristics of the tangential leakage flow of a scroll expander with air as the working fluid. Consequently, the effects of different radial gap sizes, rotational speeds, inlet pressures, and temperatures on the tangential leakage were discussed. The tangential leakage decreased with increases in the scroll expander rotational speed, inlet pressure, and temperature, and decreased with decrease in radial clearance. With an equal-proportional increase in radial clearance, the flow form of the gas in the first expansion and back-pressure chambers became more complicated; when the radial clearance increased from 0.2 to 0.5 mm, the volumetric efficiency of the scroll expander decreased by approximately 5.0521%. Moreover, because of the large radial clearance, the tangential leakage flow maintained a subsonic flow. Further, the tangential leakage decreased with increase in rotational speed, and when the rotational speed increased from 2000 to 5000 r/min, the volumetric efficiency increased by approximately 8.7565%.

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Internal Flow and Cavitation Analysis of Scroll Oil Pump by CFD Method

Cited by 3 publications

References 28 publications

Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump

Numerical Study on Cavitating Flow-Induced Pressure Fluctuations in a Gerotor Pump

Therapeutic Smart Insole Technology with Archimedean Algorithmic Spiral Triboelectric Nanogenerator-Based Power System and Sensors

Analysis of Tangential Leakage Flow Characteristics of Oil-Free Scroll Expander for a Micro-Scale Compressed Air Energy Storage System

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