Researches to Find New Resistible Materials Against Erosive Vortex Cavitation and Compound Erosion

新型抗侵蚀涡空化和复合侵蚀材料的研究

• 批准号: 63044009
• 负责人: OBA Risaburo
• 金额: $ 3.07万
• 依托单位: Institute of Fluid Science, Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63044009/
• 关键词: Compound Erosion; Cavitation Erosion; Abrasive Wear; Vortex Cavitation; Scale Effects; Non-erosive Material; Composite Material

The compound erosion, the coupling of abrasive wear and cavitation erosion, on affects the destruction of materials in many subtle ways. In this project, our studies are focused on the severe action of the erosion and the wear on accelerated cavitation, flow cavitation and impingement jet cavitation, which are significantly affected by various material properties and liquid qualities, and also are focused to clarify the mechanism of the compound erosion on metal surfaces, where unsteady vortex cavitation predominantly takes place in high-speed multiphase flows in turbomachinery. From these studies, we find the useful methods of preventing or overcoming such compound erosion, by using resistant materials and protective coatings. In order to make clear the development processes with test time and to evaluate the results, the surface deformation and the micro-scaled fracture on the eroded surface with respect to the cavitation aspects, through a scanning electron microscope as well as a highーspeed camera.

磨料磨损与空蚀耦合的复合磨损对材料的破坏有着许多微妙的影响。本课题主要研究了冲蚀磨损对加速空蚀、流动空蚀和冲击射流空蚀的严重作用，并着重阐明了高速多相流中以非定常涡空蚀为主的金属表面复合冲蚀磨损机理。通过这些研究，我们找到了防止或克服这种复合侵蚀的有效方法，即使用耐腐蚀材料和保护涂层。为了弄清随试验时间的发展过程和评价结果，通过扫描电子显微镜以及高速摄像机，在腐蚀表面上的表面变形和微尺度断裂相对于空化方面。

项目成果

Soyama Hitoshi: "Hard-Erosion-Progress in a Typical Centrifugal Pump, Especially With Respect To Marked Effects of Upstream Cavitators" Transactions of The Japan Society of Turbomachinery. 18. 691-698 (1990)

Soyama Hitoshi：“典型离心泵中的硬腐蚀进展，特别是上游空化器的显着影响”日本涡轮机械学会会刊。

Oba Risaburo: "Several Trials in the Search for a Coplete Cavitation Concept" JSME International Journal. 33. 621-628 (1990)

Oba Risaburo：“寻找完全空化概念的多项试验”JSME 国际期刊。

Toshima Masami: "Basic Study of Coupled Damage Cased by Silt Abrasion and Cavitation Erosion ( 2nd Report, Experiments with Water Channel)" Proc. 68th Annual Meeting of JSME. B. 390-392 (1990)

Toshima Masami：“淤泥磨损和空化侵蚀耦合损伤的基础研究（第二次报告，水道实验）”Proc。

S. M. Ahmed: "SEM Observation of the Vibratory Cavitation-Fracture Mode During the Incubation Period and the Small Roughness Effect" Transaction of JSME. 56. 1876-1882 (1990)

S. M. Ahmed：“孵化期振动空化断裂模式的SEM观察和小粗糙度效应”JSME汇刊。

S. M. Ahmed: "A Peculiar Behavior of Cavitation-Nuclei-Size Distributions in Sample Water Under Vibratory Erosion Tests" JSME International Journal. 33. 629-633 (1990)

S. M. Ahmed：“振动侵蚀试验下水样中空化核尺寸分布的特殊行为”JSME 国际期刊。