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Realization of small Tesla turbomachine for liquids

Research Project

Project/Area Number 20K04916
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 24010:Aerospace engineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

Okamoto Koji  東京大学, 大学院新領域創成科学研究科, 准教授 (70376507)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsテスラポンプ / マイクロポンプ / 流体粘性 / 流体工学 / ターボマシン / 航空宇宙工学 / テスラターボマシン / マイクロ流体機械 / 境界層 / レーザー流速計測
Outline of Research at the Start

液体用小型テスラターボマシンの構築に向けて,特に小型化を念頭に置いた設計指針の検討とその実証に取り組む.
数値流体解析においては,これまで知見を重ねてきた気体用テスラターボマシンとの違いを明らかにしつつ,どのような設計パラメタ及び作動条件下で高効率を達成できるのかを議論する.また,ディフューザやスクロール部分の設計が,高効率化に向けて重要になると考えられることから,それらも含めたポンプ全体の設計指針を検討する.
一方,実験においては,数値流体解析の結果を元に実証機を試作し,数値流体解析で得られた知見の検証と,小型ポンプとしての実用性を示すことを目指す.

Outline of Final Research Achievements

In this study, theoretical, numerical, and experimental investigations were carried out for a Tesla turbo machine utilized as a pump for liquid. First, we discuss the design parameters by comparing the results of theoretical and CFD analyses, and the design guideline of the rotor was obtained. Then, a new idea of conical discs was proposed to improve the pump efficiency, and its design guideline and efficiency improvement were discussed. The results showed that this new idea is more effective when the flow rate is high in its operation.
After that, a new experimental test rig was built depending on the obtained design guideline. In this experiment, the maximum efficiency reached about 22% and 2D velocity field in the diffuser and scroll was visualized by Particle Image Velocimetry.

Academic Significance and Societal Importance of the Research Achievements

この研究成果によって,液体用テスラポンプのロータの最適設計指針,笠形ディスク導入による効率改善,損失低減のカギを握るディフューザースクロール内部の流速場の可視化を達成した.これにより,テスラポンプの先行研究で問題となっていた,実機の効率の低さを解決するための足掛かりが得られたと言え,これらの成果は今後,より高効率なテスラポンプの実現に向けて,非常に有用であると期待できる.

Report

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

    (3 results)

All 2023 2022

All Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Experimental study on the operating characteristics of Tesla pump designed for liquid2023

    • Author(s)
      Sugimoto, H., Xie, Z., Okamoto, K., and Teramoto, S.
    • Organizer
      Asian Joint Conference on Propulsion & Power 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental Study on Efficiency Enhancement of Tesla Turbine by Cascade Addition2022

    • Author(s)
      Okamoto K., Nakamura, J., Yamaguchi, K., and Teramoto, S.
    • Organizer
      International Symposium on Air Breathing Engine 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 笠型ディスクを用いたテスラポンプに関する研究2022

    • Author(s)
      倉田彩司,岡本光司,寺本進
    • Organizer
      日本航空宇宙学会第61回航空原動機・宇宙推進講演会
    • Related Report
      2021 Research-status Report

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

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