Optimum Design of a Diffuser Pump for High Efficiency and Favorite Characteristics

扩散泵的优化设计，实现高效率和喜爱的特性

• 批准号: 14350095
• 负责人: TSUKAMOTO Hiroshi
• 金额: $ 10.24万
• 依托单位: KYUSHU INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350095/
• 关键词: Diffuser Pump; Unstable Characteristics; Optimum Design; Unsteady Flow; Rotor-Stator Interaction; Pressure Fluctuation; Correlation Dimension; Liapunov Exponent; 高効率; 目的関数; 最適化問題; 遺伝的アルゴリズム; 計算流体力学

Diffuser pump characteristics were measured to determine the objective functions for the optimum design of the pump. As the results of pressure measurements on bada-to-balde passage in vaned diffuser as well as casing wall of a diffuser pump, the effects of rotor-stator interaction on unsteady pressure was clarified. Unsteady hydraulic forces on pump impeller were measured, and predominant frequencies were found to be attributed by rotor-stator interaction. Chaotic analysis was done for entire flow range including unstable flow range, and Liapunov exponent as well as Liapunov dimension was found to be an objective functions of un favorite characteristics of pump. Numerical calculation was developed for cavitating pump characteristics, and calculated unsteady characteristics of cavitating pump agreed qualitatively with measured ones.Referring to the above results, Genetic Algorithm(GA) was applied to the optimum design of low solidity cascade for the vaned diffuser of a diffuser pump. The low solidity cascade optimized by GA showed better characteristics compared with original vaned diffuser.On the contrary, the following problems have not been solved :(1)Optimum design of diffuser pump for whole stage,(2)Multi objective optimum design.

通过对扩压器泵特性的测量，确定了优化设计的目标函数。通过对叶片扩压器叶片-叶片通道和扩压器泵壳体壁面压力的测量，阐明了动静干涉对非定常压力的影响。测量了作用在泵叶轮上的非定常水动力，发现其主要频率是由转子-定子干涉引起的。对包括不稳定流量范围在内的整个流量范围进行了混沌分析，发现Liapunov指数和Liapunov维数是泵的不利特性的目标函数。对空化泵的非定常特性进行了数值计算，计算结果与实测结果定性吻合，并在此基础上，将遗传算法应用于扩压器泵叶片扩压器低稠度叶栅的优化设计。用遗传算法优化的低稠度叶栅与原叶片扩压器相比，具有更好的性能，但未解决扩压器泵的全级优化设计和多目标优化设计问题。

项目成果

秋山彰一: "ディフューザポンプ軸系に作用する流体力に関する研究"日本機械学会九州支部講演論文集. 038-1. 121-122 (2003)

Shoichi Akiyama：“作用于扩散器泵轴系统的流体力的研究”日本机械工程师学会九州分会论文集 038-122（2003）。

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• DOI: 10.1115/1.1603305
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• 发表时间: 2004
• 期刊: 日本機械学会論文集 70・699
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