• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Multi-Objective Optimization of an Axial Flow Hydraulic Turbine with a Collection Device Using Evolutionary Computation Method and Elucidation of Water Collection Acceleration Action

Research Project

Project/Area Number 20K04258
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19010:Fluid engineering-related
Research InstitutionIbaraki University

Principal Investigator

Nishi Yasuyuki  茨城大学, 理工学研究科(工学野), 教授 (50585122)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords小水力 / 水車 / 軸流羽根車 / 集水装置 / 開水路 / 自由表面 / 進化的計算法 / 多目的最適化
Outline of Research at the Start

本研究は、水深の浅い開水路流れを利用する集水装置付き軸流水車の性能特性を単相流れ場で制御することで、自由表面流れ場において高出力かつ低推力を実現しうる多目的最適化設計法を構築するとともに、集水増速作用を解明することを目的とする。そこで、水深の浅い開水路において出力増大に寄与しない圧力回復効果を抑え、背圧減少効果を高めることで、出力を最大化しつつ推力を低減させるべく、進化的計算法を用いて制御する。

Outline of Final Research Achievements

The objective of this study is to develop a multi-objective optimization design method that can achieve high power and low axial thrust in a free surface flow field by controlling the performance characteristics of an axial flow hydraulic turbine with a collection device utilizing shallow open channel flow in a single-phase flow field. Therefore, a simultaneous multi-objective optimization design method of runner and collection device using evolutionary computation method was constructed to control four performance characteristics. As a result, it was demonstrated that the pressure recovery coefficient, which does not contribute to increased output in shallow open channels, can be moderately reduced and the backpressure coefficient can be reduced to significantly reduce the size of the turbine body, resulting in a significant increase in turbine output with almost the same axial thrust in actual open channels.

Academic Significance and Societal Importance of the Research Achievements

風レンズ風車は単相流解析により性能評価が可能であるが、水深の浅い開水路で作動する集水装置付き軸流水車は自由表面を考慮した混相流解析による性能評価が必須であり、計算負荷が極めて大きく最適化が困難である。本研究では、水車出力や軸推力に加えて集水増速作用に関係する圧力回復効果や背圧減少効果を単相流れ場で制御することで、実際の開水路において高出力かつ低軸推力を実現する多目的最適化設計法を構築した。得られた成果は、様々な条件下の開水路において作動する水車を計算負荷の小さい単相流解析を用いて迅速に最適化するための多目的最適化設計法の構築とその設計指針の確立に資するものである。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2023 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (2 results)

  • [Journal Article] Multi-Objective Optimization of the Collection Device Shape of an Axial Flow Hydraulic Turbine with a Collection Device2023

    • Author(s)
      Nishi Yasuyuki、Koga Hiromichi、Inagaki Terumi
    • Journal Title

      International Journal of Fluid Machinery and Systems

      Volume: 16 Issue: 1 Pages: 110-128

    • DOI

      10.5293/IJFMS.2023.16.1.110

    • NAID

      130007938290

    • ISSN
      1882-9554
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multi-objective optimization of an axial flow hydraulic turbine with a collection device to be installed in an open channel2023

    • Author(s)
      Nishi Yasuyuki、Koga Hiromichi、Wee Yi Hong
    • Journal Title

      Renewable Energy

      Volume: 209 Pages: 644-660

    • DOI

      10.1016/j.renene.2023.03.130

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 開水路における集水装置を有する軸流水車の集水装置形状の4目的最適化による高出力・低軸推力化2021

    • Author(s)
      WEE YI HONG,西泰行,古賀広理,稲垣照美
    • Organizer
      日本機械学会2021年度茨城講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 集水装置を有する軸流水車の羽根車および集水装置の多目的最適化2021

    • Author(s)
      WEE YI HONG,西泰行,古賀広理,稲垣照美
    • Organizer
      第99期日本機械学会流体工学部門講演会
    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi