Enhancement of impinging atomization by microjet injection

Chihiro Inoue, Toshinori Watanabe, Takehiro Himeno, Seiji Uzawa

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

With increasing focus on environmental effects and the need for fuel diversity in gas turbines, good liquid atomization is increasingly important. It is known that impinging atomization is able to produce fine drops by impingement of fast liquid jets. However, the atomization characteristics deteriorate at lower injection velocities. In this study, for improving atomization characteristics under a wide range of injection velocity, an effective technique is verified utilizing a small amount of gas (microjet) injection. The microjet is supplied from a pressurized reservoir independent of the liquid supply system, and it is injected from the center of the liquid nozzles toward the impingement point. To clarify the flow field and the mechanism of the effectiveness, experimental visualizations and drop size measurements are carried out. It is found that atomization is remarkably promoted when the dynamic pressure of microjet overcomes that of the liquid at the impingement point. By the microjet injection with only 1% of liquid mass flow rate, Sauter mean diameter (SMD) becomes one-tenth of the original SMD. In addition, optimized atomization efficiency is successfully achieved when the dynamic pressure of the microjet is two times that of the liquid at the impingement point.

本文言語英語
ホスト出版物のタイトルASME Turbo Expo 2013
ホスト出版物のサブタイトルTurbine Technical Conference and Exposition, GT 2013
DOI
出版ステータス出版済み - 12 17 2013
外部発表はい
イベントASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013 - San Antonio, Tx, 米国
継続期間: 6 3 20136 7 2013

出版物シリーズ

名前Proceedings of the ASME Turbo Expo
1 A

その他

その他ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013
国/地域米国
CitySan Antonio, Tx
Period6/3/136/7/13

All Science Journal Classification (ASJC) codes

  • 工学(全般)

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