Development of a new conceptual atomization simulator for liquid rocket engines

液体火箭发动机新概念原子化模拟器的开发

• 批准号: 21246125
• 负责人: UMEMURA Akira
• 金额: $ 27.29万
• 依托单位: Nagoya Industrial Science Research Institute (2013)Nagoya University (2009-2012)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21246125/
• 关键词: 乱流微粒化; 噴霧燃焼; 数値シミュレーション; サブグリッドモデル; 微小重力実験; 微粒化理論; モデリング; 自己不安定化機構; 液体ロケット; 二流体同軸ジェット; 直接数値シミュレーション; サブグリッド; 自己不安定化ループ; 2流体同軸ジェット; シミュレーシ; モデリン

Spray combustion is an indispensable technology for aero-space engines. The numerical simulation method is now being introduced for the development of advanced engines. The current spray combustion simulators, however, cannot describe the atomization of injected liquid fuel which is the most important process determining the subsequent combustion performance. In the this study, the new atomization concept derived from microgravity experiment observations were extendedly developed to reveal the self-destabilizing mechanism of high-speed liquid jet and the underlying physics of turbulent atomization. Using the new findings, we for the first time succeeded in developing a turbulent atomization sub-grid model, which can be integrated into the current spray combustion simulators to describe the local turbulent atomization feature experienced by the injected liquid fuel.

喷雾燃烧是航天发动机不可缺少的技术。数值模拟方法正在被引入先进发动机的开发中。然而，目前的喷雾燃烧模拟器不能描述喷射的液体燃料的雾化，这是决定随后的燃烧性能的最重要的过程。本研究拓展了微重力实验中的雾化概念，以揭示高速液体射流的自失稳机理和湍流雾化的物理基础。利用这些新发现，我们首次成功开发了湍流雾化亚网格模型，该模型可以集成到当前的喷雾燃烧模拟器中，以描述喷射液体燃料所经历的局部湍流雾化特征。

项目成果

Simulation of liquid jet primary breakup: Dynamics of ligament and droplet formation

• DOI: 10.1016/j.ijmultiphaseflow.2010.03.008
• 发表时间: 2010-07
• 期刊: International Journal of Multiphase Flow
• 影响因子: 3.8
• 作者: J. Shinjo;A. Umemura

ガスジェネレータの環状 2段燃焼器

气体发生器环形两级燃烧室

• 发表时间: 2010

Capillary phenomena and disintegration processes of a square cylindrical liquid column

• DOI: 10.1016/j.ijheatmasstransfer.2010.06.048
• 发表时间: 2010-11
• 期刊: International Journal of Heat and Mass Transfer
• 影响因子: 5.2
• 作者: Mohammad Ali;A. Umemura

Handbook of Atomization and Sprays : Theory and Applications(分担箇所:Chapter 14 : Spray Group Combustion)

雾化和喷雾手册：理论与应用（第 14 章：喷雾团燃烧）

• 发表时间: 2011
• 作者: 稲川慎一;松永三郎;澤田弘崇;編者:Nasser Ashgriz,分担執筆:A.Umemura
• 通讯作者: 編者:Nasser Ashgriz,分担執筆:A.Umemura

Self-destabilizing mechanism of a laminar inviscid liquid jet issuing from a circular nozzle.

• DOI: 10.1103/physreve.83.046307
• 发表时间: 2011-04
• 期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
• 作者: A. Umemura