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Research on gas turbine using pressure gain combustion for improving thermal efficiency

Research Project

Project/Area Number 21K04481
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 InstitutionTokyo Metropolitan University

Principal Investigator

Sakurai Takashi  東京都立大学, システムデザイン研究科, 准教授 (10433179)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords圧力増大燃焼 / パルス燃焼 / ガスタービン / 熱効率 / サイクル解析
Outline of Research at the Start

本研究はパルス燃焼と定圧燃焼を組み合わせた独自の圧力増大燃焼(Pressure-gain combustion)方式によりガスタービンの熱効率を+10%程度向上することを目標としている.本研究では5~10%の圧力増大の実現を目指し,パルス燃焼が圧縮機やタービンの作動に及ぼす影響の把握,およびガスタービンの性能評価により,既存の定圧燃焼で作動するガスタービンに対する圧力増大燃焼ガスタービンの利点や欠点を明らかにする.

Outline of Final Research Achievements

In this study, pulse combustion, a type of pressure-gain combustion, was applied to a gas turbine to demonstrate the improvement of thermal efficiency. First, the conditions for pulse combustion were investigated. The acceleration of the flame forming the compression wave was found to be important for increasing the pressure gain, and a maximum pressure gain of 6.7% was achieved by adjusting the fuel filling and purge fractions. Next, the performance of a gas turbine equipped with a pulse combustor was investigated through operational tests. It was confirmed that pulse combustion increased the turbine inlet pressure, resulting in an increase in power output compared to constant-pressure combustion. However, the pulsation of the combustion gas also caused the increase of fluctuations of power output and reduced the efficiency of the turbine and compressor, creating a new challenge in terms of improving thermal efficiency.

Academic Significance and Societal Importance of the Research Achievements

本研究で取り組んだパルス燃焼は,燃焼器の入口や出口が解放状態であるため定積燃焼ではない.しかし,燃焼圧力のピークは燃焼前の2倍程度まで達しており,どのような物理機構で圧力が上昇しているのか明らかではなかった.本研究の結果,圧力上昇は火炎の加速によって生じる圧縮波によることを明らかにした.
パルス燃焼は燃焼ガスの大きな脈動を生じる.この脈動がタービンだけでなく,圧縮機の作動状態にも影響し,両者の断熱効率を大きく損なっていることを明らかにした.これは圧力増大燃焼をガスタービンに適用する場合に共通する課題であり,燃焼器で生じる脈動の緩和がガスタービン熱効率の向上において必要である.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (13 results)

All 2024 2023 2022 2021 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 4 results) Remarks (2 results)

  • [Journal Article] Evaluation of Pressure Gain and Turbine Inlet Conditions in a Pulse Combustion Gas Turbine2022

    • Author(s)
      Sakurai Takashi、Sekiguchi Takehiro、Inoue Sora
    • Journal Title

      Proceedings of ASME Turbo Expo 2022

      Volume: -

    • DOI

      10.1115/gt2022-83528

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Theoretical Performance of Gas Turbines Operating with Pressure-Gain Combustion2022

    • Author(s)
      櫻井 毅司,中村 駿介,関口 武央,井上 素良
    • Journal Title

      JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

      Volume: 70 Issue: 6 Pages: 215-226

    • DOI

      10.2322/jjsass.70.215

    • ISSN
      1344-6460, 2432-3691
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] アクティブパルス燃焼器における水素-空気乱流火炎の伝播速度と燃焼圧力2024

    • Author(s)
      井上素良,櫻井毅司
    • Organizer
      第63回航空原動機・宇宙推進講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Pressure gain combustionを適用するガスタービンのサイクル解析2023

    • Author(s)
      井上素良,櫻井毅司
    • Organizer
      第51回日本ガスタービン学会定期講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Cycle Analysis of Small Gas Turbine with Pressure Gain Combustion and Experiment of Miniature Engine2023

    • Author(s)
      Sakurai, T., Inoue, S., Sekiguchi, T., Sato, A.
    • Organizer
      International Gas Turbine Congress 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Operating Condition of a Miniature Gas Turbine with a Pulse Combustor2023

    • Author(s)
      Inoue, S., Sekiguchi, T., Sato, A., Sakurai, T.
    • Organizer
      11th Asian Joint Conference on Propulsion and Power, AJCPP2023-084
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Performance characteristics of miniature gas turbine with a pulse combustor2022

    • Author(s)
      Sakurai, T., Nakamura, S., Sekiguchi, T., Inoue, S.
    • Organizer
      Proceedings of ISABE 2022, ISABE2021-061
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] パルス燃焼ガスタービンの運転特性2022

    • Author(s)
      関口武央,井上素良,佐藤あすか,櫻井毅司
    • Organizer
      第50回日本ガスタービン学会定期講演会,B-10
    • Related Report
      2022 Research-status Report
  • [Presentation] パルス燃焼ガスタービンにおける燃焼圧力の評価および性能への影響2022

    • Author(s)
      井上素良,関口武央,櫻井毅司
    • Organizer
      第61回航空原動機・宇宙推進講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Evaluation of pressure gain and turbine inlet conditions in a pulse combustion gas turbine2022

    • Author(s)
      Sakurai, T., Sekiguchi, T., Inoue, S.
    • Organizer
      ASME Turbo Expo 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] パルス燃焼と定圧燃焼を組み合わせた圧力増大燃焼ガスタービンの性能評価2021

    • Author(s)
      関口武央,中村駿介,櫻井毅司
    • Organizer
      第49回日本ガスタービン学会定期講演会
    • Related Report
      2021 Research-status Report
  • [Remarks] 燃焼・推進工学研究室ホームページ

    • URL

      https://www.comp.sd.tmu.ac.jp/comb/index.htm

    • Related Report
      2022 Research-status Report
  • [Remarks] 研究者Researchmap

    • URL

      https://researchmap.jp/tsakuaerospace

    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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