Analysis of Instability Force Mechanism of Ultra High Speed and Ultra High Pressure Non-contacting Seal under Two Phase Flow

两相流下超高速超高压非接触密封失稳受力机理分析

• 批准号: 05452165
• 负责人: IWATSUBO Takuzo
• 金额: $ 4.74万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452165/
• 关键词: Two Phase Flow; Dynamic Fluid Force; Nonsynchronous Vibration; Non-contacting Seal; Turbo-machinery; Pump; Ultra High Speed; Ultra High Pressure

Development of ultra high speed and ultra high pressure turbo-machinery is needed in liquid fuel pump of rocket engine, ultra conductive generator and so on. However nonsynchronous vibration is occured by the instabillity force of non-contacting seal because seal clearance is reduced in order to prevent the leakage loss. In this paper analysis instability force and instability analysis of high performance rotor are experimentally and theoretically perforemed in the case of two phase flow of turbo-pump. From this point of view the following studies are carried out ;(1) Analysis of static and dynamic characteristics of double spiral seal and comparison of the characteristics with experimental results.(2) Analysis of static and dynamic characteristics of two phase flow force through non-contacting seal and stability of rotor under the two phase flow.As the result, the followings are obtained ;(1) Idea of equivalent clearance can be avairable in the analysis of non-contacting seal.(2) Static and dynamic characteristics of two phase flow seal can be theoretically obtained, then stability of pump rotor in the two phase flow can be analyzed.

火箭发动机的液体燃料泵、超导发电机等需要发展超高速、超高压涡轮机械，但为了防止泄漏损失，减小密封间隙，非接触密封的失稳力会引起非同步振动。本文从实验和理论两方面对高性能涡轮泵转子在两相流情况下的失稳力和失稳分析进行了研究。从这一角度出发，本文进行了以下研究：（1）对双螺旋密封的静、动态特性进行了分析，并与实验结果进行了比较。(2)分析了非接触密封中两相流的静、动态特性及转子在两相流作用下的稳定性，得出以下结论：（1）在非接触密封的分析中可以采用等效间隙的思想; (2)从理论上得到了两相流密封的静、动态特性，进而分析了泵转子在两相流中的稳定性。

项目成果

Takuzo IWATSUBO: "The Dynamic Forces Pump Annular Seal Induced by Two Phase Flow" ISROMAC-5,Fifth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery. (1994)

Takuzo IWATSUBO：“两相流引起的动态力泵环形密封”ISROMAC-5，第五届旋转机械输送现象和动力学国际研讨会。

Takuzo IWATSUBO: "The Dynamic Forces of Pump Annular Seals Through Two Phase flow" IFToMM Fourth Int.Conf.Dynamics. 191-196 (1994)

Takuzo IWATSUBO：“两相流中泵环形密封件的动态力”IFToMM 第四届 Int.Conf.Dynamics。

Takuzo IWATSUBO,Tadashi NISHINO: ""An Experimental Study on the Static and Dynamic Characteristics of Pump Annular Seals with Two Phase Flow"" NASA. CP-3239. 49-64 (1993)

Takuzo IWATSUBO、Tadashi NISHINO：“两相流泵环形密封件静态和动态特性的实验研究”，NASA。

Takuzo IWATSUBO: "The Dynamic Forces of Pump Annular Seals Through Two Phase Flow" IFToMM Fourth Int. Conf. Rotor Dynamics. 191-196 (1994)

Takuzo IWATSUBO：“两相流中泵环形密封件的动态力”IFToMM 第四届 Int。

Takuzo IWATSUBO,Tadashi NISHINO: ""An Experimental Study on the Dynamic Characteristics of Pump Annular Seals by Two Phase Flow"" D&D'93. No.930-42, Vol.A. 282-286 (1993)

Takuzo IWATSUBO、Tadashi NISHINO：“两相流泵环形密封动态特性的实验研究”D