考虑表面粗糙度影响的低温涡轮泵特性与动静间隙流动分析

V434; 为分析低温涡轮泵过流部件表面粗糙度对其性能特性的影响,阐明表面粗糙度对涡轮泵动静间隙流场的影响机制,选择增材制造闭式叶轮涡轮氧泵为研究对象,在考虑低温介质热力学效应影响的前提下,采用液氮作为增压输送介质,对涡轮泵低温性能开展实验测试和数值计算.研究结果表明:在 13 500～26 000 r/min转速范围内,相较于光滑壁面,考虑过流部件表面粗糙度后,采用液氮作为模拟介质得到的涡轮氧泵数值计算结果与实验测试数据吻合较好;随着离心叶轮及蜗壳等主流表面粗糙度从光滑壁面增加至 36μm,涡轮氧泵扬程及效率分别下降了 9.1%、10.6%;随着动静间隙过流部件表面粗糙度从 0 增加至 20...

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Published in西安交通大学学报 Vol. 58; no. 6; pp. 77 - 89
Main Authors 卜学兵, 付平, 孙中国, 席光
Format Journal Article
LanguageChinese
Published 西安交通大学能源与动力工程学院,710049,西安%西安交通大学未来技术学院,710049,西安%西安交通大学能源与动力工程学院,710049,西安 01.06.2024
西安交通大学未来技术学院,710049,西安
Subjects
热力学效应
表面粗糙度
axial thrust
涡轮泵
rotor-stator cavity
动静间隙
轴向力
turbopump
thermodynamic effects
surface roughness
Online AccessGet full text
ISSN0253-987X
DOI10.7652/xjtuxb202406008

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Abstract V434; 为分析低温涡轮泵过流部件表面粗糙度对其性能特性的影响,阐明表面粗糙度对涡轮泵动静间隙流场的影响机制,选择增材制造闭式叶轮涡轮氧泵为研究对象,在考虑低温介质热力学效应影响的前提下,采用液氮作为增压输送介质,对涡轮泵低温性能开展实验测试和数值计算.研究结果表明:在 13 500～26 000 r/min转速范围内,相较于光滑壁面,考虑过流部件表面粗糙度后,采用液氮作为模拟介质得到的涡轮氧泵数值计算结果与实验测试数据吻合较好;随着离心叶轮及蜗壳等主流表面粗糙度从光滑壁面增加至 36μm,涡轮氧泵扬程及效率分别下降了 9.1%、10.6%;随着动静间隙过流部件表面粗糙度从 0 增加至 20μm,涡轮泵叶轮轴向力合力系数显著降低了 25.8%.研究结果对后续深入揭示表面粗糙度对低温涡轮泵动静间隙流场特性影响规律以及过流部件表面质量分区控制具有重要借鉴意义及参考价值.
AbstractList V434; 为分析低温涡轮泵过流部件表面粗糙度对其性能特性的影响,阐明表面粗糙度对涡轮泵动静间隙流场的影响机制,选择增材制造闭式叶轮涡轮氧泵为研究对象,在考虑低温介质热力学效应影响的前提下,采用液氮作为增压输送介质,对涡轮泵低温性能开展实验测试和数值计算.研究结果表明:在 13 500～26 000 r/min转速范围内,相较于光滑壁面,考虑过流部件表面粗糙度后,采用液氮作为模拟介质得到的涡轮氧泵数值计算结果与实验测试数据吻合较好;随着离心叶轮及蜗壳等主流表面粗糙度从光滑壁面增加至 36μm,涡轮氧泵扬程及效率分别下降了 9.1%、10.6%;随着动静间隙过流部件表面粗糙度从 0 增加至 20μm,涡轮泵叶轮轴向力合力系数显著降低了 25.8%.研究结果对后续深入揭示表面粗糙度对低温涡轮泵动静间隙流场特性影响规律以及过流部件表面质量分区控制具有重要借鉴意义及参考价值.
Abstract_FL To analyze the effects of surface roughness of flow passage component on cryogenic turbopump performance and explain the influence mechanism of surface roughness on rotor-stator centripetal flow,a cryogenic turbopump made of shrouded impeller produced by additive manufacturing is selected as the research object,and the experimental tests and numerical calculations on the performance of cryogenic turbopump are carried out taking into consideration the influence of thermodynamic effects and using liquid nitrogen as the pressurizing and conveying medium.The results show that when the test working condition is in the range of 13 500 to 26 000 r/min,the values of outlet pressure and temperature rise obtained by numerical calculation are fitted with the test data after considering the effects of the surface roughness,compared with the numerical results obtained from smooth wall setting.As the values of the impeller and volute surface roughness increase to 36 μm,the head coefficient and efficiency decrease by 9.1%and 10.6%,respectively.The axial thrust acting on the impeller decreases significantly by 25.8%,after increasing the values of the rotor-stator surface roughness from 0 to 20 μm.The study provides a theoretical foundation for revealing the influence of surface roughness on cryogenic turbopump flow characteristics and zoned controlling the surface quality of the turbopump flow passage components.
Author 孙中国
付平
席光
卜学兵
AuthorAffiliation 西安交通大学能源与动力工程学院,710049,西安%西安交通大学未来技术学院,710049,西安%西安交通大学能源与动力工程学院,710049,西安;西安交通大学未来技术学院,710049,西安
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Author_FL FU Ping
SUN Zhongguo
XI Guang
BU Xuebing
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DocumentTitle_FL Cryogenic Turbopump Performance under the Effects of Surface Roughness and Analysis of Rotor-Stator Centripetal Flow
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Issue 6
Keywords 热力学效应
表面粗糙度
axial thrust
涡轮泵
rotor-stator cavity
动静间隙
轴向力
turbopump
thermodynamic effects
surface roughness
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PublicationTitle 西安交通大学学报
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PublicationYear 2024
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Snippet V434; 为分析低温涡轮泵过流部件表面粗糙度对其性能特性的影响,阐明表面粗糙度对涡轮泵动静间隙流场的影响机制,选择增材制造闭式叶轮涡轮氧泵为研究对象,在考虑低温介质热...
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Title 考虑表面粗糙度影响的低温涡轮泵特性与动静间隙流动分析
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