Response and flow characteristics of a dual-rotor turbine flowmeter

Ren, Zhipeng; Zhou, Weixing; Li, Deyou

doi:10.1016/j.flowmeasinst.2022.102120

Cited by 15 publications

(3 citation statements)

References 11 publications

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“…The details have been elaborated on in our previous studies. 33 The entire flow passage was divided into four types of boundary conditions: inlet, outlet, wall, and interface. Adiabatic conditions (without slip boundaries) are applied to all wall surfaces.…”

Section: Numerical Methods and Boundary Conditionsmentioning

confidence: 99%

Dissolution and evolution effects on pressure fluctuations in a space micropump

Ren

Hao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The purpose of this paper is to reveal the dynamic mass transfer effects between gas and liquid on pressure fluctuations in a space micropump using our proposed computational model of gas–liquid mass transfer. Complex dissolution and evolution processes were applied to achieve accurate dynamic gas–liquid mass transfer predictions in the micropump. The validation of experiments was conducted by measuring the performance characteristics of the micropump, and the mass transfer model was verified by a dissolved oxygen concentration experiment in plug discharge flow. Based on this, four conditions including unsteady single-phase, two-phase without mass transfer, dissolution, and coexisting dissolved–released flows calculations are discussed to clarify the frequency contents, generation reasons, and propagation law. Combined with entropy production analysis, the pressure fluctuation influenced by the dissolution and evolution is illustrated. The results exhibit that the evolution of the gas is located on the head of the long blade suction surface in the impeller. When a unidirectional gas-to-liquid dissolution process occurs, the fluctuating amplitude of the characteristic dominant 5 fn is significantly weakened; otherwise, when dissolution and evolution coexist, the amplitude is significantly promoted as the released gas increase the flow instability. In addition, the distributions of local high entropy production induced by mean and fluctuating velocity gradients overlap that of large mass transfer rates and high amplitude of the mixing frequency in the volute, exhibiting the relationship between entropy production, mass transfer, and flow instability. The current study provides a guidance that the dissolved gases’ concentration must be controlled strictly to avoid the evolution of gas for the safety and stability of the space hydraulic system.

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Section: Numerical Methods and Boundary Conditionsmentioning

confidence: 99%

Dissolution and evolution effects on pressure fluctuations in a space micropump

Ren

Hao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Since its first invention in 1790 by Reinhard Woltmann, the turbine meter has been widely investigated; where in 1960, an equation based on angular momentum was developed to complete the theoretical model [41][42][43][44] .…”

Section: The Turbine Metermentioning

confidence: 99%

An experimental comparison of meter calibration used in a photovoltaic water pumping system installed in an arid environment

Bekraoui¹,

Yaichi²,

Mammeri³

et al. 2023

Preprint

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Energy and water are crucial for humans in all their activities. In rural areas, irrigation is a surviving key where sustainable approaches like solar water pumping systems are required to meet this demand. One of the crucial challenges in the hydraulic field is the flow rate measurement with high accuracy. The exact estimation of the water flow rate pumped using a solar photovoltaic water pumping system is essential to evaluate the system's performance. This paper presents an analytical method to study a comparative analysis of the results of the system measurement errors. The experimental data are collected from our pumping system located in Adrar city (Algeria). The performance is analyzed using the measured water flow rate data using three different meters, one ultrasonic and two turbine meters, where a turbine meter is used as a standard meter. The test was done in May 2019. Keys words: PV pumping system, meter measurement, measurement accuracy, error calibration, ultrasonic flow meter, turbine flow meter.

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“…In the research of dual-rotor turbine flow meters, the rotor response, combined with visualization experiments and unsteady simulations, was investigated by Ren et al [1,2]. Their research showed that the downstream rotor speed compensates for speed calculation, reducing measurement instability of the upstream rotor.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cavitation Flow and Entropy Production Characteristics in a Dual-Rotor Turbine Flowmeter

Liu,

Zhang,

Wang

et al. 2024

Processes

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Flow meters are extensively utilized in fields such as chemical engineering, petroleum, and aerospace, and are an indispensable component of modern industry. This paper examines the metrological properties of a dual-rotor turbine flow meter within its measurable flow range through experimental approaches and investigates the cavitation flow dynamics within the flow meter using numerical methods. First, the flow characteristics curve of the dual-rotor turbine flow meter was established experimentally, and the accuracy of numerical simulation results was validated. Secondly, the transient characteristics of the cavitation cavity were revealed using the Z-G-B cavitation model and dynamic mesh technology. Finally, entropy production theory was applied to investigate the energy losses caused by cavitation, analyzing the contributions of different types of energy losses during the cavitation process. Flow calibration experiments and numerical simulations reveal an increase in the meter coefficient of the dual-rotor turbine flow meter in high-flow cavitation zones, indicating that the displayed flow rate is slightly higher during cavitation compared to non-cavitating flows. Transient cavitation flow undergoes three stages: attachment, development, and collapse. At 323 K, the volume fractions of upstream and downstream cavities increase by 38.9% and 48.3%, respectively, with the cavitation cycle duration being 1.21 times that at 298 K. At 343 K, these increases are 75.3% and 239.2%, with the cycle duration being 2.63 times that at 298 K. Among the various sources of loss, the contribution from losses due to pulsating velocity gradients is the most significant, with maximum proportions of 81.95%, 85.1%, and 87.11% at 298 K, 323 K, and 343 K, respectively.

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Response and flow characteristics of a dual-rotor turbine flowmeter

Cited by 15 publications

References 11 publications

Dissolution and evolution effects on pressure fluctuations in a space micropump

Dissolution and evolution effects on pressure fluctuations in a space micropump

An experimental comparison of meter calibration used in a photovoltaic water pumping system installed in an arid environment

Investigation of Cavitation Flow and Entropy Production Characteristics in a Dual-Rotor Turbine Flowmeter

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