航天推进技术研究院主办
[1]李志刚,安阳,叶小强.液氢涡轮泵孔型阻尼密封设计与性能评估[J].火箭推进,2022,48(02):105-116.
LI Zhigang,AN Yang,YE Xiaoqiang.Investigations on the scheme design and performance evaluation of the hole-pattern damper seal in a liquid hydrogen turbopump[J].Journal of Rocket Propulsion,2022,48(02):105-116.
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LI Zhigang,AN Yang,YE Xiaoqiang.Investigations on the scheme design and performance evaluation of the hole-pattern damper seal in a liquid hydrogen turbopump[J].Journal of Rocket Propulsion,2022,48(02):105-116.
液氢涡轮泵孔型阻尼密封设计与性能评估
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
48
期数:
2022年02期
页码:
105-116
栏目:
目次
出版日期:
2022-04-30
- Title:
- Investigations on the scheme design and performance evaluation of the hole-pattern damper seal in a liquid hydrogen turbopump
- 文章编号:
- 1672-9374(2022)02-0105-12
- 分类号:
- V434.21
- 文献标志码:
- A
- 摘要:
- 针对某液氢涡轮泵级间迷宫密封流体激振诱发转子涡动失稳问题,开展了孔型阻尼密封方案设计及密封泄漏特性和转子动力特性评估研究。通过不同密封间隙、孔径和孔深等关键几何参数的组合,共设计液氢孔型阻尼密封方案25种。采用定常CFD(computational fluid dynamics)数值预测方法,计算分析了密封间隙、孔径和孔深对液氢孔型阻尼密封泄漏量的影响规律 采用基于多频单向转子涡动模型、动网格技术和转子动力特性系数频域识别方法的非定常CFD摄动数值预测方法,计算分析了孔径和孔深对液氢孔型阻尼密封转子动力特性系数的影响规律。研究表明:液氢孔型阻尼密封的孔深和孔径的比值(密封孔深径比H/D)存在一个临界值(H/D=0.5附近),此时密封泄漏量最小 H/D<0.5时,液氢孔型阻尼密封泄漏量对孔深变化不敏感(小于4.5) 较大孔径的液氢孔型阻尼密封具有更小的有效刚度 较小孔深的液氢孔型阻尼密封具有更小的有效刚度和更大的有效阻尼 综合考虑液氢孔型阻尼密封泄漏特性和转子动力特性,液氢孔型阻尼密封应选取较小间隙、较大孔径和最佳深径比以内(H/D<0.5)的较小孔深。
- Abstract:
- To solve the rotor vibration instability induced by the fluid-response forces of the inter-stage labyrinth seal in a liquid hydrogen turbopump, investigations on the scheme design of the hole-pattern seal were carried, as well as the performance evaluation of the seal leakage and rotordynamic characteristics.Total 25 seal schemes were designed for the liquid hydrogen hole-pattern seal, by the combination of various sealing clearances, hole diameters and hole depths.The effects of sealing clearance, hole diameter and hole depth on the seal leakage characteristics were calculated and discussed for the liquid hydrogen hole-pattern seal, using a steady CFD(computational fluid dynamics)numerical method.The effects of hole diameter and hole depth on the seal rotordynamic characteristics also were predicted and analyzed for the liquid hydrogen hole-pattern seal, using a transient CFD perturbation numerical method based on the multi-frequency one-dimensional rotor whirling model, the mesh deformation technique and the identification method of the rotordynamic force coefficients in frequency domain.Results show that there is a critical value for the ratio of hole depth to the hole diameter(H/D approaches to 0.5)where the liquid hydrogen hole-pattern seal possesses the least leakage flow rate.The hole depth has a very weak influence(less than 4.5)on the leakage flow rate of the liquid hydrogen hole-pattern seal when H/D<0.5.The liquid hydrogen hole-pattern seal with the larger hole diameter generates the smaller effective stiffness.The liquid hydrogen hole-pattern seal with the shallower hole depth generates the smaller effective stiffness and the larger effective damping.Comprehensively considering the seal leakage and rotordynamic characteristics, for the liquid hydrogen hole-pattern seal, it is better to choose the smaller sealing clearance,the larger hole diameter and the shallower hole depth with H/D<0.5.
参考文献/References:
[1] 张远君. 液体火箭发动机涡轮泵设计[M].北京: 北京航空航天大学出版社, 1995.
[2] 张树强,陈杰,赵伟刚.液体火箭发动机涡轮泵用非接触式密封研究现状及展望[C]//中国航天第三专业信息网第三十七届技术交流会暨第一届空天动力联合会议论文集.[S.l.]: 中国航天第三专业信息网, 2016.
[3] 沈文金, 叶小强. 深度变推发动机浮动环工作适应性研究[J].火箭推进, 2017, 43(5): 28-33.
SHEN W J, YE X Q. Investigation for working adaptability of floating ring seals in deep throttling engines[J].Journal of Rocket Propulsion, 2017, 43(5): 28-33.
[4] 尹源, 廖传军, 王志峰, 等. 火箭涡轮泵机械密封研究综述[J].宇航总体技术, 2017, 1(3): 54-60.
[5] 曹树谦, 陈予恕. 现代密封转子动力学研究综述[J].工程力学, 2009, 26(S2): 68-79.
[6] VANCE J, ZEIDAN F, MURPHY B. Machinery vibration and rotordynamics[M].Hoboken, NJ: John Wiley & Sons, Inc, 2010.
[7] 罗巧军, 褚宝鑫, 须村. 氢涡轮泵次同步振动问题的试验研究[J].火箭推进, 2014, 40(5): 14-19.
LUO Q J, CHU B X, XU C. Experimental research for sub-synchronous vibration problems of hydrogen turbopump[J].Journal of Rocket Propulsion, 2014, 40(5): 14-19.
[8] 徐悦, 田爱梅. 基于CFD的涡轮泵转子密封流体激振研究进展[J].火箭推进, 2005, 31(1): 8-13.
XU Y, TIAN A M. Progress of investigation on turbopump annular seal fluid-induced vibration based on CFD[J].Journal of Rocket Propulsion, 2005, 31(1): 8-13.
[9] YU Z, CHILDS D W. A comparison of experimental rotordynamic coefficients and leakage characteristics between hole-pattern gas damper seals and a honeycomb seal[J].ASME Journal of Engineering for Gas Turbines and Power, 1998, 120(4):778-783.
[10] 李军, 晏鑫, 李志刚. 热力透平密封技术[M].西安: 西安交通大学出版社, 2016.
[11] CHILDS D W, MOYER D. Vibration characteristics of the HPOTP(high pressure oxygen turbopump)of the SSME(space shuttle main engine)[J].ASME Journal of Engineering for Gas Turbines and Power, 1985, 107(1): 152-159.
[12] CHILDS D W, RAMSEY C. Seal-rotor dynamic-coefficient test results for a model SSME ATD-HPFTP turbine interstage seal with and without a swirl brake[J].Journal of Tribology, 1991, 113(1): 198-203.
[13] CHILDS D W, KIM C H. Analysis and testing for rotordynamic coefficients of turbulent annular seals with different, directionally-homogeneous surface-roughness treatment for rotor and stator elements[J].Journal of Tribology, 1985, 107(3): 296-305.
[14] CHILDS D W, KIM C H. Test results for round-hole-pattern damper seals: optimum configurations and dimensions for maximum net damping[J].Journal of Tribology, 1986, 108(4): 605-609.
[15] CHILDS D, WADE J L. Rotordynamic-coefficient and leakage characteristics for hole-pattern-stator annular gas seals:measurements versus predictions[J].Journal of Tribology, 2004, 126: 326-333.
[16] BROWN P D, CHILDS D W. Measurement versus predictions of rotordynamic coefficients of a hole-pattern gas seal with negative preswirl[J].Journal of Engineering for Gas Turbines and Power, 2012, 134(12): 122503.
[17] VANNARSDALL M, CHILDS D W. Static and rotordynamic characteristics for a new hole-pattern annular gas seal design incorporating larger diameter holes[J].Journal of Engineering for Gas Turbines and Power, 2014, 136(2): 022507.
[18] CHILDS D W, STEPHEN A, MEHTA N J. The impact of hole depth on the rotordynamic and leakage characteristics of hole-pattern-stator gas annular seals[J].Journal of Engineering for Gas Turbines and Power, 2014, 136(4): 042501.
[19] JOLLY P, HASSINI A, ARGHIR M,et al. Experimental and theoretical rotordynamic coefficients of smooth and-round-hole pattern water fed annular seals[C]//ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. New York:ASME, 2014.
[20] 方志, 李志刚, 李军. 孔型几何参数对孔型密封泄漏和鼓风加热特性影响研究[J].西安交通大学学报, 2019, 53(1): 135-141.
[21] 方志, 李志刚, 李军. 异形孔腔结构对液体孔型密封泄漏特性及转子耗功的影响[J].西安交通大学学报, 2020, 54(1): 143-149.
[22] 毛凯, 李昌奂, 张聃, 等. 高压液氧涡轮泵孔型/蜂窝阻尼密封的设计[J].火箭推进, 2021, 47(2): 47-53.
MAO K, LI C H, ZHANG D, et al. Design of the hole-pattern/honeycomb seals in the high-pressure liquid oxygen turbopump[J].Journal of Rocket Propulsion, 2021, 47(2): 47-53.
[23] 冀沛尧, 何立东, 胡航领, 等. 涡轮泵密封对转子动力特性的影响[J].润滑与密封, 2019, 44(1): 52-57.
[24] 涂霆, 何立东, 李宽, 等. 涡轮泵密封动力学特性和封严性能的分析与优化[J].中国科技论文, 2016, 11(22): 2568-2574.
[25] CHILD D W. Turbomachinery rotordynamic: phenomena, modeling and analysis[M].New York: John Wiley & Sons Inc, 1993.
[26] LI Z, LI J, YAN X.Multiple frequencies elliptical oscillating orbit model and RANS solutions [J].ASME Journal of Vibration and Acoustic, 2013, 135(3): 031005.
[27] LI Z G, LI J, FENG Z P. Comparisons of rotordynamic characteristics predictions for annular gas seals using the transient computational fluid dynamic method based on different single-frequency and multifrequency rotor whirling models[J].Journal of Tribology, 2016, 138(1): 011701.
[28] 李志刚, 李军, 丰镇平. 袋型阻尼密封转子动力特性的多频单向涡动预测模型[J].西安交通大学学报, 2012, 46(5): 13-18.
备注/Memo
收稿日期:2022-01-14 修回日期:2022-01-27
基金项目:国家自然科学基金面上项目(51776152)
作者简介:李志刚(1986—),男,博士,教授,研究领域为叶轮机械先进密封技术。
更新日期/Last Update:
1900-01-01