Performance investigations of cross flow hydro turbine with the variation of blade and nozzle entry arc angle

Ranjan, Rajeev; Alom, Nur; Singh, Jaswant; Sarkar, Bikash Kumar

doi:10.1016/j.enconman.2018.12.075

Cited by 22 publications

(2 citation statements)

References 19 publications

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“…The squirrel-cage blower form of CFT enables the water to flow across the blades twice. Considering Figure 9, in the first stage, the waterjet enters the runner at point A to strike blade, AB, tangentially and then flows across the empty space to the inner side of the runner at point C. In the second stage, the water, again, hits the blade, CD, and discharges through the outer, D. Literature has divergent views on the blade of CFT in terms of number and angle [57][58][59]. Too many blades increase a runner's loss, weight, and cost while too few blades cause incomplete utilization of water [60].…”

Section: The Number Of Rims and Bladesmentioning

confidence: 99%

Deployment of Design Sequence for Crossflow Turbine Functionality Enhancement

Ebhota

Tabakov

2023

ARFMTS

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The grossly untapped hydro potential in the global south is attributed to the inadequate technical personnel; as one of the main factors limiting the design and manufacturing of efficient small hydropower (SHP) turbine plants. The technical personnel and production facilities available in the global south, especially in sub-Saharan Africa (SSA), cannot support the development of these components sufficiently. The study presents the CFT design process in a clearer and simplified manner. To bridge the technical knowledge gap, the study presents an improved SHP system design procedure through a partly isolated-based design sequence. The entire design process of the SHP turbine, with a focus on crossflow turbine (CFT), was divided into sections, subsections, and parts. The study presents connections between geometry, operation, and functionality of design parameters for CFT components, such as runner, shaft, pulley, and belt graphically and in tabular forms.

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Section: The Number Of Rims and Bladesmentioning

confidence: 99%

Deployment of Design Sequence for Crossflow Turbine Functionality Enhancement

Ebhota

Tabakov

2023

ARFMTS

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“…Oliy et al [9] designed a suitable turbine using all turbine parameters to achieve a maximum efficiency cross-flow turbine and performed computational fluid dynamic simulation as an important tool for the turbine's performance. Ranjan et al [10] aimed to increase the efficiency of a cross-flow hydro turbine with geometric modification by conducting numerical research of the cross-flow hydro turbine in Ansys Fluent using multiple physics finite volume solver. Makarim et al [11] examined the effect of the blade depth ratio and the number of blades on the power coefficient of cross-flow water turbines.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of a Pico Hydro Turbine

BEYAZGÜL

Durmaz

Yalçınkaya

et al. 2022

Sakarya University Journal of Science

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Pico hydro turbines (PHT) are suitable for low head applications in power plants since their efficiency is more stable than other turbine types. In some situations, computational fluid dynamics (CFD) has been also utilized as well as experimental studies for the performance prediction of water turbines at a pico scale. Also, CFD methods are getting much closer to real conditions in terms of steady-state with moving references, and transient domains with rotor movements. For this purpose, electricity production related to the flow in a PHT was investigated numerically. This study presents the method to predict the maximum conditions of a pico scale two-dimensional turbine by comparing the torque (τ) and angular velocity (ω) on the runner based on turbine output power. Besides, the effect of the torque, angular velocity, tip speed ratio (TSR), and turbine body profile was investigated comprehensively. In this regard, the CFD method with moving reference frame (MRF) and six degrees of freedom (6-DOF) were performed in order to validate and compare the numerical model with the experimental data. Compared with the experimental study, the numerical results for the performance of the pico hydro turbine were reasonable. It is also concluded that there is a tip speed ratio of 2.36 with the MRF method and 0.48 with the 6-DOF method between water tangential velocity and runner velocity for the turbine model.

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