Effect of impeller inlet diameter on saddle-shaped positive slope and non-uniform flow patterns at low flow rates of a mixed-flow pump

Kim, Yong-In; Yang, Hyeon-Mo; Lee, Kyoung‐Yong; Choi, Young Seok

doi:10.1080/19942060.2022.2074544

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…Wang et al [6] studied the optimal design of turbomachinery based on the inverse design method(IDM), using the parabolic curve parameterize IOAM, proposed the forced vortex design and the compound vortex design, and studied the effect of different vortex designs on the optimization results of mixed-flow pump impeller. Kim et al [7] studied the influence of inlet Angle on the internal flow characteristics and stability of a mixed-flow pump. The results showed that the fluctuation in the total pressure rise decreased when the average incidence angle was lesser than that of the design flow rate, and the backflow was mostly suppressed and the saddle was improved with a wider operating range by reducing the inlet diameter.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on internal flow characteristics of a mixed-flow pump with Tandem malposed blades

Chenhao,

Xingqi,

Xitong

et al. 2024

J. Phys.: Conf. Ser.

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Mixed-flow pump plays an important role in national major projects and national economic construction. In this paper, a mixed-flow pump is taken as the research object, and the internal flow characteristics and the distribution of turbulent kinetic energy in the pump under different malposed angles of blade are studied by using numerical simulation and blade modification method. The results show that the pump efficiency and head are higher when the tandem blade angles (α) are 15° and 45°, and the pump head is the largest at the α =15°, increasing by 4.37%. Meanwhile, the high-pressure area inside the impeller was large, which had a higher pressurization performance. Under the rated flow condition, the velocity curve of α =15° changes most gently, which is close to the prototype velocity curve, and the single hump zone is not obvious. The tandem malposed blades can restrain the velocity fluctuation and improve the flow field in the impeller. At α =45°, the turbulent kinetic energy dissipation and the velocity fluctuation were the smallest; the flow field was the most stable. The research results have reference significance for the optimal design and selection of mixed flow pump.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation on internal flow characteristics of a mixed-flow pump with Tandem malposed blades

Chenhao,

Xingqi,

Xitong

et al. 2024

J. Phys.: Conf. Ser.

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Effect of circumferential spokes on the rotating stall flow field of mixed-flow pump

Li,

Long,

et al. 2024

Energy

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Study on stall characteristics of the water jet propulsion pump device based on entropy generation theory and third-generation vortex identification method

Jiao,

Xi,

Cheng

et al. 2024

Physics of Fluids

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The generation of stall conditions will directly affect the hydraulic and energy characteristics of the water jet propulsion pump. Utilizing the entropy generation theory, this study conducts a comparative analysis of the entropy generation loss distribution across each water jet propulsion pump device component under varying flow conditions. The investigation delineates the entropy generation loss variation with changes in the flow rate, revealing that the impeller and the inlet duct emerge as the primary contributors to entropy generation loss in the system. Through a comparative analysis of the flow patterns and entropy generation loss rate distribution under design conditions and two stall conditions for the inlet duct and impeller section, this study elucidates the entropy generation loss distribution characteristics in these sections. The investigation aims to provide insights into the factors contributing to the occurrence of high entropy generation areas. Additionally, the Liutex Omega vortex identification method is employed in this study to elucidate the correlation between vortex structure and the entropy generation loss rate distribution under diverse operating conditions. This approach further substantiates the underlying reasons for the observed entropy generation loss rate distribution.

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Effect of impeller inlet diameter on saddle-shaped positive slope and non-uniform flow patterns at low flow rates of a mixed-flow pump

Cited by 3 publications

References 31 publications

Numerical Investigation on internal flow characteristics of a mixed-flow pump with Tandem malposed blades

Numerical Investigation on internal flow characteristics of a mixed-flow pump with Tandem malposed blades

Effect of circumferential spokes on the rotating stall flow field of mixed-flow pump

Study on stall characteristics of the water jet propulsion pump device based on entropy generation theory and third-generation vortex identification method

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