The Effect of Cavitation Inside the Nozzle on Unsteady Sprays (Second Report)

ノズル内キャビテーションが非定常噴霧に及ぼす影響（第２報）

The characteristics of the fuel spray are known to be affected by cavitating flow inside the nozzle hole. Due to the difficulty of the investigation inside the nozzle with real size injector, there are many reports using enlarged transparent nozzle. However, the promotion mechanism of cavitation phenomena for spray atomization process has not been yet clarified. In this paper, the cavitation phenomena inside the nozzle hole was visualized by using enlarged transparent nozzles of varying length-to-width ratio (l/w ratio) in order to clarify the effect of l/w ratio on cavitation phenomena inside the nozzle hole and on the behavior of injected liquid jet. As results of these experiments, the growth and phase of cavitation depend on l/w ratio. Furthermore, it has become clear that spread of the liquid jet strongly depends on the length from cavitation reattachment point to nozzle exit.本研究ではノズル内部で生じるキャビテーションが燃料噴霧の微粒化に及ぼす影響の解明を目的とする．本報ではノズルの噴孔長さの変化がキャビテーションおよび噴流挙動に及ぼす影響について検証した．特にキャビテーション末端から放出される気泡群に着目し，噴流の拡がりに対する主たる要因について考察した．

• Record URL:
  https://doi.org/10.11351/jsaeronbun.47.1057
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02878321
• Authors:
  • Matsumura, Eriko
  • Inagaki, Ryosuke
  • Yamazaki, Takayoshi
  • Haibara, Teruaki
  • Mitani, Shinichi
  • Senda, Jiro
• Publication Date: 2016

Language

• English
• Japanese

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 1057-1062
• Serial:
  • Transactions of Society of Automotive Engineers of Japan
  • Volume: 47
  • Issue Number: 5
  • Publisher: Society of Automotive Engineers of Japan
  • ISSN: 0287-8321
  • EISSN: 1883-0811
  • Serial URL: https://www.jstage.jst.go.jp/browse/jsaeronbun
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Fuels; Heat engines; Motor vehicles; Nozzles; Spark ignition engines; Sprays (Materials)
• Uncontrolled Terms: Atomization
• Subject Areas: Energy; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01664207
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Mar 26 2018 9:20AM