Calculation of Axial Hydraulic Thrust of Francis Turbine

Xing-ying, JI; Xu, Lihua; Liu, Xiao

doi:10.1115/fedsm2012-72070

Cited by 2 publications

(3 citation statements)

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“…Moreover, turbines have vertical shaft settings and, together with extreme weights, result in urgent demands on a precise prediction of possible operating conditions. Lifting accidents of Francis turbines are known [105,114].…”

Section: Axial Thrustmentioning

confidence: 99%

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Flow Inside the Sidewall Gaps of Hydraulic Machines: A Review

Zemanová

Rudolf

2020

Energies

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The paper critically reviews the current state of the art in flow inside sidewall gaps of hydraulic pumps and turbines. It describes the consequences of the presence of this type of flow in turbomachinery and then relates it to other physical phenomena that determine the behavior, operating characteristics, and overall performance of the machine. Despite the small dimensions of the rotor-stator spaces, the flow in these regions can significantly affect the overall flow field and, consequently, efficiency. The circulation of the fluid inside the gaps and secondary flow that is caused by rotating elements influences the disk friction losses, which is of great importance, especially in the case of low specific speed pumps and turbines. The flow pattern affects the pressure distribution inside a machine and, thus, generates axial thrust. The presence of secondary flow also significantly changes the rotordynamics and can bring about undesirable vibrations and acoustics issues. This article aims to review and summarize the studies that were conducted on the mentioned phenomena. Experimental and numerical studies are both taken into consideration. It proposes some requirements for prospective research in order to fill current gaps in the literature and reveals the upcoming challenges in the design of hydraulic machines.

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Section: Axial Thrustmentioning

confidence: 99%

“…Some difference also exists during steady operating conditions; however, there is a rapid increase as a result of a sudden decrease in flow rate. Ji et al [114] also mentioned the significant effect of the static suction of the turbine on the potential lifting of the turbine.…”

Section: Axial Thrustmentioning

confidence: 99%

Flow Inside the Sidewall Gaps of Hydraulic Machines: A Review

Zemanová

Rudolf

2020

Energies

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“…When the turbine runned stablely, the wheel rotated at a constant speed ω ,that is [5,6]. Therefore the value of the speed…”

Section: The Working Principle Of the Turbine And The Structure Of Th...mentioning

confidence: 99%

Analysis and Calculation of a Gravity Turbine Torque, Speed

Yin

2015

AMM

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In order to understand the operation of the water turbine generating by gravity .With the method of Linearization, equivalent and torque balance, this paper analysed, drove and calculated the water turbine’s rotational torque and speed theoretically ,and calculated by using examples according the motion characteristics of the turbine. By calculating, the factors of the water turbine’s capacity, the expression of the rotational torque and the turbine’s speed were obtained.

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Calculation of Axial Hydraulic Thrust of Francis Turbine

Cited by 2 publications

References 0 publications

Flow Inside the Sidewall Gaps of Hydraulic Machines: A Review

Flow Inside the Sidewall Gaps of Hydraulic Machines: A Review

Analysis and Calculation of a Gravity Turbine Torque, Speed

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