Design and Analysis of Crossflow Turbine Prototype for Picohydro Scale

Subekti, Ridwan Arief; Susatyo, Anjar; Sudibyo, Henny

doi:10.1109/icseea.2018.8627139

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…The power from the engine is transmitted from the flywheel, which rotates the pump to input the power. The pump drives the fluid to rotate and impact the turbine blades to output the power 3 , and the torque converter used in article has shown in Figure 1. The addition of a lock-up clutch in the torque converter allows the turbine and pump to be connected as one part at high speed ratio.…”

Section: Introductionmentioning

confidence: 99%

Comparison influence of bilateral fluid pressure on fluid-solid coupling model of hydraulic torque converter structure

Wang,

Xue,

Geng

et al. 2024

Advances in Mechanical Engineering

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The main purpose of this paper is to explore the importance of external flow field circulation of hydraulic torque converter assembly in analysis. Compared with simply considering the internal flow field characteristics, it has influence on the internal flow field analysis, external characteristics and structural stress of hydraulic torque converter assembly. This paper models the flow path of the torque converter with different Schemes, the flow field pressures distribution on the impeller are analysed using computational fluid dynamics method (CFD). Scheme A adopts the traditional idea, which simply considering the influence of internal flow field on the performance. Scheme B contacts the external flow field especially including the auxiliary cavity, and comprehensively studies the influence of it on the performance. The results show that with the addition of an auxiliary chamber, the overall flow field pressure of the torque converter is lower than that without the auxiliary chamber. The external characteristics of the torque converter assembly were tested on experiment equipment, which has been verified that the CFD simulation results with the addition of the auxiliary chamber are closer to the experiment data, proving the accuracy of the method for the pressure simulation of flow field. On this basis, the stresses and deformations of the torque converter considering the auxiliary fluid chamber are compared and analysed in relation to the displacement limitations of the impellers. The results show that the maximum stress in the turbine is reduced by 57%–12% compared to the scheme A without considering the auxiliary fluid. In the case of special operating condition, the maximum stress was 137.06 MPa before considering the auxiliary fluid, while the maximum stress was 60.625 MPa after considering the auxiliary fluid, and the reduction is 57%. The effects of input speed, speed ratio and impeller structure on the stress and deformation were also analysed, and the results show that the impeller structure and input speed have a great influence on the stress and deformation.

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Section: Introductionmentioning

confidence: 99%

Comparison influence of bilateral fluid pressure on fluid-solid coupling model of hydraulic torque converter structure

Wang,

Xue,

Geng

et al. 2024

Advances in Mechanical Engineering

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“…To this end, a contribution is made by traditional cross-flow turbines (Adhikari & Wood, 2018;Rantererung et al, 2019;Sammartano et al, 2015Sammartano et al, , 2016Sammartano et al, , 2017aSinagra et al, 2016;Subekti et al, 2018). These turbines are usually preferred because of their low cost, consistent with the available hydraulic power, usually lower than one megawatt.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of a new cross-flow type hydraulic turbine for high head and low flow rate

Picone

Sinagra

Aricò

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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Cross-flow turbines have recently been proposed for energy recovery in aqueducts when the outlet pressure is greater than zero, owing to their constructive simplicity and good efficiency within a large range of flow rates and head drops. In the case of high head drop (higher than 150 m) and relatively small discharge (lower than 0.2 m 3 /s), the traditional design of these turbines leads to very small widths of the nozzle and the runner; as a consequence, friction losses grow dramatically and efficiency drops down to very low values. Standard Pelton turbines require zero outlet pressure and cannot be used as alternatives. A new counter-pressure hydraulic turbine for high head and low flow rate, called the High Power Recovery System (H-PRS) is proposed. H-PRS presents a different geometry to reduce friction losses inside the nozzle and the runner by widening the two external walls. Several curved baffles are proposed to guide the fluid particles inside the nozzle and to guarantee the right velocity direction at the inlet surface of the runner. Computational Fluid Dynamics (CFD) 3D transient analyses are carried out to measure H-PRS efficiency for different operating conditions and to compute its characteristic curve for different positions of the regulating flap.

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Design and Analysis of Crossflow Turbine Prototype for Picohydro Scale

Cited by 2 publications

References 10 publications

Comparison influence of bilateral fluid pressure on fluid-solid coupling model of hydraulic torque converter structure

Comparison influence of bilateral fluid pressure on fluid-solid coupling model of hydraulic torque converter structure

Numerical analysis of a new cross-flow type hydraulic turbine for high head and low flow rate

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