Development of New Gas Atomizer Supersonic Nozzle System for Super-micro-metal Powder Production

用于超微金属粉末生产的新型气体雾化器超声喷嘴系统的开发

• 批准号: 04555045
• 负责人: MATSUO Kazuyasu
• 金额: $ 8.7万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555045/
• 关键词: Gas Atomizer; Supersonic Nozzle; Supersonic Jet; Correct Expansion; Under Expansion; Jet Cell Structure; Atomization

1.The flow fields of supersonic axisymmetric jets impinging on an inclined flat plate were experimentally studied, and the effects of location of shock cells on the flow state, the pressure distributions on the plate and the force added by the jet were presented.2.The three-dimensional axisymmetric and the two-dimensional supersonic freejets were analyzed numerically with the TVD method over a wide range of pressure ratios from 20 to 150.The results were summarized to enable the estimation of the shape of a freejet.3.The structures of coupled flow state of supersonic free jets interacting with inclined angles from two supersonic nozzles were studied experimentally and the flow pattems were clarified.4.The diagnostic system based on the inline laser-holography was contracted to clarify the process of gas atomization, and it was shown that this method is effective to determine the size and location of droplets.The accuracy of this method was also discussed and clarified.5.The atomization process of molten metal by supersonic jets in the gas atomization method were observed by the diagnostic system developed in the present research project.The relations between the jet cell structures and the power size distributions generated by the gas atomization were clarified.

1.对超音速轴对称射流撞击倾斜平板的流场进行了实验研究，分析了激波单元位置对流动状态的影响。用TVD方法对三维轴对称自由射流和二维超音速自由射流进行了数值分析，得到了压力比在20~150范围内的数值结果。3.实验研究了两个超音速喷嘴倾角相互作用的超音速自由射流的耦合流态结构，阐明了流型。4.建立了基于激光全息照相术的气体雾化诊断系统，对气体雾化过程进行了研究。并对该方法的准确性进行了讨论。5.利用本研究开发的诊断系统，对气体雾化方法中超音速射流雾化金属熔体的雾化过程进行了观测，阐明了雾化过程中射流单元结构与雾化功率大小分布之间的关系。

项目成果

Yoshitomo Satoh, et al.: "Effects of Supersonic Jet on Paticle Size of Gas-atomized Metal Powder" Kobe Steel Engineering Reports. 42-4. 3-6 (1992)

Yoshitomo Satoh 等人：“超音速射流对气雾化金属粉末颗粒尺寸的影响”神户制钢所工程报告。

望月博昭: "傾斜した平板に衝突する超音速噴流" 九州大学総合理工学研究科報告. 14. 391-396 (1993)

望月宏明：“超音速射流撞击倾斜平板”九州大学研究生院理工学研究报告，14. 391-396 (1993)。

Hiroaki Mochizuki, et al.: "Observation of Flow Field Generated by Two Intersecting Supersonic Jets" Engineering Sciences Reports, Kyushu University. 14-1. 41-47 (1992)

Hiroaki Mochizuki 等人：“两个相交超音速射流产生的流场的观察”工程科学报告，九州大学。

望月博昭: "二つの交差する超音速噴流による流れ場の観察" 九州大学総合理工学研究科報告. 14. 41-47 (1992)

望月宏明：“两个相交的超音速射流引起的流场的观察”九州大学研究生院理工学报告书14. 41-47（1992）。

佐藤義智: "ガスアトマイズ法でえられた金属粉末の粒子径に及ぼす超音速噴流の影響" 神戸製鋼技法. 42. 3-6 (1992)

佐藤义智：“超音速射流对气体雾化获得的金属粉末粒径的影响”神户制钢技术42. 3-6 (1992)。