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63888000.pdf5.46 MB
title液膜式気流噴射弁の設計パラメータ・作動条件が噴霧特性に与える影響:複数の噴射弁形態の比較による考察
Other TitleEffects of design parameters and operating conditions on spray characteristics of annular-liquid-film-type airblast atomizers: Comparison among atomizers with different designs
First report
第1報
Author(jpn)松浦 一哲; 丸永 拓哉; 鈴木 俊介; 須田 充; 井戸 教雄; 黒澤 要治; 牧田 光正; 林 茂
Author(eng)Matsuura, Kazuaki; Marunaga, Takuya; Suzuki, Shunsuke; Suda, Mitsuru; Ido, Norio; Kurosawa, Yoji; Makida, Mitsumasa; Hayashi, Shigeru
Author Affiliation(jpn)宇宙航空研究開発機構 航空プログラムグループ 環境適応エンジンチーム; 東京電機大学 大学院; 法政大学 大学院; 法政大学 大学院; 法政大学 工学部; 宇宙航空研究開発機構 航空プログラムグループ 環境適応エンジンチーム; 宇宙航空研究開発機構 航空プログラムグループ 環境適応エンジンチーム; 宇宙航空研究開発機構 航空プログラムグループ 環境適応エンジンチーム
Author Affiliation(eng)Japan Aerospace Exploration Agency Clean Engine Team, Aviation Program Group; Tokyo Denki University Graduate School; Hosei University Graduate School; Hosei University Graduate School; Hosei University Faculty of Engineering; Japan Aerospace Exploration Agency Clean Engine Team, Aviation Program Group; Japan Aerospace Exploration Agency Clean Engine Team, Aviation Program Group; Japan Aerospace Exploration Agency Clean Engine Team, Aviation Program Group
Issue Date2007-03-30
PublisherJapan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構
Publication date2007-03-30
Languagejpn
AbstractThe effects of design parameters and operating conditions on spray characteristics of annular-liquid-film-type airblast atomizers are currently under investigation to obtain insights into the development of high-performance aero-engine fuel injectors. As the first attempt of a series of studies on this issue, this paper provides a review of results obtained by the authors, on atomizers of different designs for both practical and research use. Comparison of the experimental results shows that counter-swirl combinations of airflow sandwiching an annular liquid film result in narrower spray dispersion than co-swirl cases, but the trend with respect to atomization characteristics is not as clear as is seen in some literatures. The results on a non-prefilming atomizer show that, with counter-swirl combinations of airflow, the case in which the liquid-swirl direction is the same as that of the outer air swirl shows better atomization performance than its counterpart. The designs causing acceleration of air velocity near the atomizer lip seem to improve atomization but also to result in narrower spray angles. The atomization performance is improved by increasing normalized air pressure drop across atomizers or by increasing ambient pressure and their effects on the spray dispersion pattern could be explained by simple Stokes number analysis. On the other hand, the effect of the air-to-liquid mass flow rate ratio is small and sometimes unclear. In the paper, a problem on the evaluation of atomization performance by using concentration-based measurement techniques is also briefly discussed. Finally, suggestions for future work are made, including more systematic approach for better physical understandings, and some strategies for good atomizer designs are also proposed.
DescriptionJAXA Research and Development Memorandum
宇宙航空研究開発機構研究開発資料
Keywordsaircraft engine; combustion chamber; fuel injection; liquid atomization; operating condition; particle size distribution; fuel spray; nitrogen oxide; liquid film; nozzle design; shrouded nozzle; 航空機エンジン; 燃焼室; 燃料噴射; 液体微粒化; 操作条件; 粒度分布; 燃料スプレー; 窒素酸化物; 液膜; ノズル設計; シュラウド付ノズル
Document TypeTechnical Report
JAXA Category研究開発資料
ISSN1349-1121
SHI-NOAA0063888000
Report NoJAXA-RM-06-014
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/40487


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