Performance Prediction of Darrieus-Type Hydroturbine with Inlet Nozzle Operated in Open Water Channels

K. Nakashima, Satoshi Watanabe, D. Matsushita, Shinichi Tsuda, A. Furukawa

研究成果: ジャーナルへの寄稿Conference article

抄録

Small hydropower is one of the renewable energies and is expected to be effectively used for local supply of electricity. We have developed Darrieus-type hydro-turbine systems, and among them, the Darrieus-turbine with a weir and a nozzle installed upstream of turbine is, so far, in success to obtain more output power by gathering all water into the turbine. However, there can several cases exist, in which installing the weir covering all the flow channel width is unrealistic, and in such cases, the turbine should be put alone in open channels without upstream weir. Since the output power is very small in such a utilization of small hydropower, it is important to derive more power for the cost reduction. In the present study, we parametrically investigate the preferable shape of the inlet nozzle for the Darrieus-type hydroturbine operated in an open flow channel. Experimental investigation is carried out in the open channel in our lab. Tested inlet nozzles are composed of two flat plates with the various nozzle converging angles and nozzle outlet (runner inlet) widths with the nozzle inlet width kept constant. As a result, the turbine with the nozzles having large converging angle and wide outlet width generates higher power. Two-dimensional unsteady numerical simulation is also carried out to qualitatively understand the flow mechanism leading to the better performance of turbine. Since the depth, the width and the flow rate in the real open flow channels are different from place to place and, in some cases from time to time, it is also important to predict the onsite performance of the hydroturbine from the lab experiment at planning stage. One-dimensional stream-tube model is developed for this purpose, in which the Darrieus-type hydroturbine with the inlet nozzle is considered as an actuator-disk modelled based on our experimental and numerical results.

元の言語英語
記事番号102011
ジャーナルIOP Conference Series: Earth and Environmental Science
49
発行部数10
DOI
出版物ステータス出版済み - 12 13 2016
イベント28th IAHR Symposium on Hydraulic Machinery and Systems, IAHR 2016 - Grenoble, フランス
継続期間: 7 4 20167 8 2016

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open water
turbine
prediction
weir
open channel flow
channel flow
electricity
simulation
energy
experiment

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

これを引用

Performance Prediction of Darrieus-Type Hydroturbine with Inlet Nozzle Operated in Open Water Channels. / Nakashima, K.; Watanabe, Satoshi; Matsushita, D.; Tsuda, Shinichi; Furukawa, A.

:: IOP Conference Series: Earth and Environmental Science, 巻 49, 番号 10, 102011, 13.12.2016.

研究成果: ジャーナルへの寄稿Conference article

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