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[1]杨宝锋,贾少锋,李 斌,等.大偏心及大扰动下涡轮泵密封转子动力特性[J].火箭推进,2019,45(06):1-9.
　YANG Baofeng,JIA Shaofeng,LI Bin,et al.Investigation on rotordynamic characteristics of a turbopump seal under large eccentricities and disturbances[J].Journal of Rocket Propulsion,2019,45(06):1-9.
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大偏心及大扰动下涡轮泵密封转子动力特性

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 45 期数: 2019年06期 页码: 1-9 栏目: 研究与技术 出版日期: 2019-12-25
Title:
Investigation on rotordynamic characteristics of a turbopump seal under large eccentricities and disturbances
文章编号:
1672-9374(2019)06-0001-09
作者:
杨宝锋1; 2; 贾少锋2; 李 斌1; 3; 陈 晖1; 2
(1.液体火箭发动机技术重点实验室,陕西 西安 710100; 2.西安航天动力研究所,陕西 西安 710100; 3.航天推进技术研究院,陕西 西安 710100)
Author(s):
YANG Baofeng1; 2;  JIA Shaofeng2;  LI Bin1; 3;  CHEN Hui1; 2
(1.Science and Technology on Liquid Rocket Engine Laboratory, Xi’an 710100, China; 2.Xi’an Aerospace Propulsion Institute, Xi’an 710100, China; 3.Academy of Aerospace Propulsion Technology, Xi’an 710100, China)
关键词:
涡轮泵;  密封;  大偏心;  大扰动;  Bulk-Flow;  计算流体力学;  动力学特性
Keywords:
turbopump;  seal;  large eccentricity;  large disturbance;  Bulk-Flow;  computational fluid dynamics;  dynamic characteristics
分类号:
V434.21
文献标志码:
A
摘要:
为获得大偏心以及大扰动下涡轮泵浮动环密封的转子动力特性,采用修正的Bulk-Flow模型和CFD准稳态法进行了研究。通过试验数据验证了两种方法的求解精度及可靠性,获得了不同静偏心以及扰动量下密封动特性系数的变化规律。结果表明:修正的Bulk-Flow模型和CFD准稳态法均能较好地预测密封动特性系数,且CFD法具有更高的求解精度; 对于高压高转速涡轮泵,浮动环密封引入的刚度与滚动轴承刚度量级相当,其对转子系统动力学特性影响不应忽略; 大偏心下密封各动特性系数显著增大,而大扰动下,各系数与扰动量之间呈现出复杂的非线性关系。
Abstract:
A revised Bulk-Flow model and the quasi-steady CFD method were adopted to investigate the rotordynamic characteristics of a turbopump floating ring seal under large eccentricities and disturbances.The precision and reliability of these two methods were verified by the seal test data and the variation of the rotordynamic characteristics of the seal under different eccentricities and disturbances were obtained.Results show that the revised Bulk-Flow model and the CFD method can effectively predict the rotordynamic coefficients of seals and the CFD method presents better accuracy.For high-pressure-speed turbopumps, the stiffness introduced by a floating ring seal is comparable to the stiffness of the rolling bearing, thus the influence of the seal on rotor dynamic characteristics should not be ignored.The rotordynamic coefficients increase significantly under large eccentricities while the complex nonlinear relationship is depicted between these coefficients and large disturbances.

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备注/Memo

收稿日期:2019-03-20; 修回日期:2019-05-05基金项目:国家重点基础研究发展计划(613321)作者简介:杨宝锋(1989—),男,博士,研究领域为液体火箭发动机涡轮泵技术

更新日期/Last Update: 2019-12-20