Behavior of Fuel Spray Injected by Tailpipe Injector for Post Treatment of Diesel Engine Emissions (Third Report)

ディーゼルエンジン排気管内インジェクタから噴射される 後処理用燃料噴霧の挙動 (第3報)

Secondary Fuel Injection (SFI) is applied to regenerate Diesel Particulate Filter (DPF) which is an after-treatment device of diesel engine. Under this system, ensuring complete evaporation and an optimum mixture distribution in the exhaust line is important. This report focuses on impingement spray in high temperature field to understand its physical phenomena using scattered light photography method and Exciplex fluorescence method with swirl nozzle and n-dodecane. As a result, in evaporation field, the specific vortex of swirl spray disappears after wall impingement in Pinj=1 MPa, but the vortex is maintained in Pinj=4 MPa. And vapor concentration distribution in Pinj=4 MPa is more widely distributed than 1 MPa.ディーゼル機関の後処理装置であるDPFの再生手法としてSFIが適用されている.そこで,本研究では排気管内インジェクタから噴射される燃料挙動を光学的に可視化し,HC挙動を予測可能な数値モデルの構築を目的としている.本報では,高温場における壁面衝突噴霧に着目し,衝突した液滴が付着,蒸発する挙動を明らかにした.


  • English
  • Japanese

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01673405
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: May 15 2018 3:03PM