Study on an undershot cross-flow water turbine

Nishi, Yasuyuki; Inagaki, Terumi; Li, Yanrong; Omiya, Ryota; Fukutomi, Junichiro

doi:10.1007/s11630-014-0701-y

Cited by 30 publications

(25 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The test runner [12,13] used in this study is illustrated in Fig. 1, and its specifications are presented in Table 1.…”

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

“…Therefore, few such studies of these complex analyses have Under such a background, we focused our attention on runners in cross-flow turbines [10,11] used with penstocks under intermediate and low head conditions with the aim of developing a water turbine for use in open channels, which is also suitable for ultra-low heads. Substantial simplification was attained in the analysis by eliminating the guide vane, casing, etc., and a cross-flow turbine was applied to an open channel as an undershot water turbine [12,13]. The performance of the cross-flow turbine (undershot cross-flow turbine) installed in an open channel was experimentally clarified [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Substantial simplification was attained in the analysis by eliminating the guide vane, casing, etc., and a cross-flow turbine was applied to an open channel as an undershot water turbine [12,13]. The performance of the cross-flow turbine (undershot cross-flow turbine) installed in an open channel was experimentally clarified [12,13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Flow Field of Undershot Cross-Flow Water Turbines Based on PIV Measurements and Numerical Analysis

Nishi¹,

Inagaki²,

Li³

et al. 2014

International Journal of Fluid Machinery and Systems

Self Cite

View full text Add to dashboard Cite

The ultimate objective of this study is to develop a water turbine appropriate for low-head open channels to effectively utilize the unused hydropower energy of rivers and agricultural waterways. The application of a cross-flow runner to open channels as an undershot water turbine has been considered and, to this end, a significant simplification was attained by removing the turbine casing. However, the flow field of an undershot cross-flow water turbine possesses free surfaces, and, as a result, the water depth around the runner changes with variation in the rotational speed such that the flow field itself is significantly altered. Thus, clear understanding of the flow fields observed with free surfaces to improve the performance of this turbine is necessary. In this study, the performance of this turbine and the flow field were evaluated through experiments and numerical analysis. The particle image velocimetry technique was used for flow measurements. The experimental results reflecting the performance of this turbine and the flow field were consistent with numerical analysis. In addition, the flow fields at the inlet and outlet regions at the first and second stages of this water turbine were clarified.

show abstract

“…The test runner [12,13] used in this study is illustrated in Fig. 1, and its specifications are presented in Table 1.…”

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Flow Field of Undershot Cross-Flow Water Turbines Based on PIV Measurements and Numerical Analysis

Nishi¹,

Inagaki²,

Li³

et al. 2014

International Journal of Fluid Machinery and Systems

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fan, propeller, and screw-type rotors are common examples of horizontal axis units and Darius, Savonius, Gorlov, and Flipwing types are vertical axis units. Helical blade and Darrieus straight blade water turbines are commonly suitable for extraction of the kinetic energy of flowing water (Behrouzi, Maimun, & Nakisa, 2014;Lopes, Vaz, Mesquita, Mesquita & Blanco, 2015;Nishi, Inagaki, Li, Omiya, & Fukutomi, 2014;Nishi, Inagaki, Li, & Hatano, 2015;Sahim, Ithisan, Santoso, & Sipahutar, 2014;Verma, Garg, & Rajput, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Yuce and Muratoglu (2014) published a technology status review of hydrokinetic energy conversion systems. There are several publications on the undershot turbine, efficiency improvement techniques, experimental study of Darrieus-Savonius water turbine and dynamic behaviour of hydrokinetic turbines (Behrouzi et al, 2014;Lopes et al, 2015;Nishi et al, 2014;Nishi et al, 2015;Sahim et al, 2014;Verma et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Design of Hydrokinetic Energy Generation System

Zengin

Aslan

Artunç

et al. 2016

CBUP

View full text Add to dashboard Cite

Along with technological developments and increasing population, people are in need of more energy sources. This need has led researchers to go towards new energy generation methods. One of these methods is hydrokinetic energy generation, which has been studied intensively in recent years. In this study, complete design of a hydrokinetic turbine that converts kinetic energy into mechanical and electrical energy with the most efficiency using tidal water is proposed. Moreover, an undershot water wheel system is designed to gain the least dissipationless conversion of kinetic energy. The design of the hydrokinetic energy generation system is developed considering the environmental and maintenance factors, maximum efficiency and buoyancy. Calculation for the velocity of the turbine is made by using Betz's law, usually used for wind energy conversion systems. Conversion of obtained mechanical energy from the turbine to electrical energy is supplied by using a proper alternator system. UDC Classification: 621.22 DOI: http://dx

show abstract