Liquid–Gas Jet Pump: A Review

Zhang, Huiyan; Zou, Daohang; Yang, Xiaojie; Mou, Jiegang; Zhou, Qingfeng; Xu, Mingang

doi:10.3390/en15196978

Cited by 10 publications

(6 citation statements)

References 77 publications

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“…It was concluded that by integrating a Knock-out Drum to the system, the jet pump operates in a closed circuit and its efficiency is higher than operating in an open system. Zhang et al [15] recently reviewed the research and application status of liquid gas jet pumps, and highlighted the superiority and irreplaceability of these devices in many technological processes.…”

Section: Suction Chambermentioning

confidence: 99%

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1D modelling of the liquid-gas jet pump performance

Ravan Ghalati,

Croquer,

Nesreddine

et al. 2023

Progress in Canadian Mechanical Engineering. Volume 6

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The performance of a liquid-gas jet pump, which uses a high-velocity liquid flow to compress and entrain a gas flow, can be divided into two modes; on-design and off-design. The present paper investigates the mentioned modes of performance using a 1D model based on the conservation equations of mass, momentum and energy. Comparisons in terms of compression ratio and efficiency between the present model and experimental data show that the 1D model is capable of predicting the behavior of the liquid-gas jet pump for both modes. The effects of the primary flow velocity head, and areas of the mixing throat and diffuser on the performance of the jet pump are also investigated through a sensitivity study.

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Section: Suction Chambermentioning

confidence: 99%

“…Conservation of mass, energy and momentum for the water jet in the mixing throat can be expressed by Eqs (15), ( 16) and (17), respectively:…”

Section: ) Mixing Throatmentioning

confidence: 99%

1D modelling of the liquid-gas jet pump performance

Ravan Ghalati,

Croquer,

Nesreddine

et al. 2023

Progress in Canadian Mechanical Engineering. Volume 6

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“…A jet pump has the characteristics of a simple structure and safe and reliable operation, and it is widely used in the field of water conservancy effuser system and other fields (Xu et al, 2021;Zhang et al, 2022;Winoto et al, 2000). In order to better adapt to the diversity and complexity of the sprinkler irrigation system environment, related scholars have performed many experiments with jet pumps as research objects, with a view to revealing the hydraulic performance and internal flow structure of jet pumps and to provide data support for the application of the pumps in engineering practice (Lu et al, 2015a;Lyu et al, 2016;Aissa et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Influence of the vertically arranged front injector system on the performance and operational stability of the short jet pump

Ma,

Yang,

Dai

et al. 2024

Front. Energy Res.

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As the core component of a water conservancy sprinkler irrigation system, the self-priming jet pump is required not only to meet performance criteria for self-priming but also to align with the growing trend toward compactness in sprinkler irrigation systems. This paper takes the short compact self-priming jet pump as the research object whose injector is perpendicular to the main flow direction of the impeller inlet in order to reduce the volume of the jet pump and adopts the method of numerical simulation combined with experimental validation to study the effect of vertical arrangement of the injector on the hydraulic characteristics and operational instability of the self-priming jet pump. The results show that compared with the traditional hydraulic structure, the front injector leads to a significant reduction in the applicable flow range of the short jet pump. The hydraulic efficiency of the jet pump is notably inferior to that of traditional pumps across various flow conditions. This discrepancy arises from the eccentric rotation induced by the front-mounted injector, leading to pronounced circumferential asymmetry in the media flow within the individual impeller channels. Consequently, this asymmetry contributes to increased hydraulic losses in the flow channel. At the same time, the smaller overflow area within the injector enhances the turbulent flow characteristics of the medium, leading to increased instability of the subsequent flow field. This induces the generation of unwieldy low-frequency pressure pulsation signals within the flow channel, which are more readily propagated throughout the sprinkler system. In the practical application of short jet pumps, the circumferentially asymmetric distribution of the media flow in the impeller channel may result in the eccentric rotation of the rotor, thereby diminishing the service life of the pump. Furthermore, the complicated low-frequency signals will induce low-frequency vibration of the hydraulic sprinkler system, reducing the operational stability of the sprinkler system.

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“…One of its primary objectives is to maximize the air intake while minimizing the swirl number. By incorporating the existing liquid-gas ejector water intake and suction technology, the objective is to address issues such as excessive fluid swirling and inadequate air intake at the outlet of the cleaning spray bar [19][20][21]. The CFD technique was used to simulate and analyze the swirl number of outlet mixed fluid, the inlet volume, and the specific flow conditions in the flow channel for each model.…”

Section: Introductionmentioning

confidence: 99%

Flow Channel Optimization to Improve the Performance of a Liquid–Gas Ejector for an Intelligent Toilet Spray Bar

Zhou,

Zhu,

Yang

et al. 2023

Atmosphere

Self Cite

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Intelligent toilets can effectively remove odors and harmful substances from exhaust gases and wastewater, maintaining a fresh and clean indoor atmosphere, which is beneficial to the indoor environment and human health. Currently, research on intelligent toilets conducted by sanitary ware manufacturers is still in its early stages. Many of the intelligent toilets available on the market exhibit issues such as an excessive oscillation amplitude of the cleaning spray bar, premature breakdown of the water column, and inadequate air intake. The present study involves the analysis and redesign of a cleaning spray bar model for intelligent toilets. Additionally, several optimization schemes concerning the flow channel of the cleaning spray bar are proposed in order to enhance the performance of the liquid–air ejector. The computational fluid dynamics (CFD) technique is utilized to analyze the water flow characteristics within the cleaning spray bar of the intelligent toilet and to compare and evaluate the proposed schemes. The calculation results indicate that, for the same inlet flow rate, the optimal structure the block with a length of L = 1.5 mm and the block positioned (4). The swirl numbers of these two optimized models are 14.8% and 8.3% of the protype, respectively, while their air intake is 133% and 131% of the protype, respectively. The optimized solutions exhibited significant performance improvements when compared to the prototype. The computational results offer valuable insights for optimizing the flow characteristics of the enhanced product.

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Liquid–Gas Jet Pump: A Review

Cited by 10 publications

References 77 publications

1D modelling of the liquid-gas jet pump performance

1D modelling of the liquid-gas jet pump performance

Influence of the vertically arranged front injector system on the performance and operational stability of the short jet pump

Flow Channel Optimization to Improve the Performance of a Liquid–Gas Ejector for an Intelligent Toilet Spray Bar

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