各级差异化多级刷式密封级间压降均衡性数值与实验研究

赵欢; 李业隆; 孙丹; 慕伟; 马婷; 胡广阳

doi:10.13224/j.cnki.jasp.20210248

各级差异化多级刷式密封级间压降均衡性数值与实验研究

doi: 10.13224/j.cnki.jasp.20210248

赵欢¹,
李业隆¹,
孙丹^1, ,,
慕伟^2,3,
马婷^2,3,
胡广阳^2,3

1.
沈阳航空航天大学航空发动机学院辽宁省航空推进系统先进测试技术重点实验室，沈阳 110136
2.
中国航空发动机集团有限公司沈阳发动机研究所，沈阳 110015
3.
中国航空发动机集团有限公司航空发动机动力传输航空科技重点实验室，沈阳 110015

基金项目: 国家自然科学基金（52075346，51675351）；辽宁省自然科学基金（2019-ZD-0236）；辽宁省教育厅基础研究项目（JYT2020047）

详细信息

作者简介:
赵欢（1982-），女，副教授，博士，主要研究航空发动机新材料密封的制备技术及其特性研究。

通讯作者:
孙丹（1981-），男，教授，博士，主要从事涡轮机械先进密封技术研究。E-mail：phd_sundan@163.com

中图分类号: V233.5
计量
- 文章访问数: 85
- HTML浏览量: 3
- PDF量: 102
- 被引次数: 0
出版历程
- 收稿日期: 2021-05-18
- 刊出日期: 2022-05-28

Numerical and experimental investigation on interstage pressure drop equalization of differential multi-stage brush seals

ZHAO Huan¹,
LI Yelong¹,
SUN Dan^{1
, ,},
MU Wei^2,3,
MA Ting^2,3,
HU Guangyang^2,3

1.
Key Laboratory of Advanced Measurement and Test Technique for Aviation;Propulsion System，Liaoning Province，School of Aero-engine，Shenyang Aerospace University，Shenyang 110136
2.
Shenyang Engine Research Institute，Aero Engine Corporation of China，Shenyang 110015，China
3.
Key Laboratory for Power Transmission of Aero Engine， Aero Engine Corporation of China，Shenyang 110015，China

摘要

摘要: 分析多级刷式密封级间压降分配特性理论，提出新型各级差异化多级刷式密封结构，基于流固耦合方法建立新型多级刷式密封三维实体计算模型，设计搭建新型多级刷式密封泄漏流动特性实验装置，数值与实验研究在不同工况条件下，结构参数对新型结构多级刷式密封级间压降均衡性和泄漏特性的影响规律。研究结果表明：传统结构多级刷式密封各级级间压降占比均衡性标准差为8.41，新型结构各级级间压降占比均衡性标准差最大为4.69，最小为2.07。相较传统各级相同结构，增大下游级有效流通面积的新型各级差异化多级刷式密封可有效改善级间压降的不均衡性。提高后挡板保护高度使得新型结构各级级间压降占比均衡性标准差最小，各级级间压降占比较接近，可明显改善新型结构多级刷式密封级间压降均衡性。减少刷丝束厚度和增大刷丝束与转子面间隙使新型结构多级刷式密封的泄漏量增大明显。
- 新型各级差异化多级刷式密封 /
- 流固耦合 /
- 三维实体建模 /
- 级间压降均衡性 /
- 泄漏流动
Abstract: Through analysis of multi-stage brush seal interstage pressure drop distribution characteristic theory，a new brush seal structure of differential stage was presented，and based on the fluid-structure interaction method，a new multi-stage brush seal three-dimensional entity model at all stages was established to build a new multi-stage brush type seal leakage flow characteristics experiment device；through numerical and experimental research under the different working conditions，the effects of structural parameters on pressure drop equilibrium and leakage characteristics of a new type of multi-stage brush seal were analyzed.The results showed that the standard deviation of the equilibrium ratio of pressure drop between different stages of the traditional multi-stage brush seal structure was 8.41，and that of the equilibrium ratio of pressure drop between different stages of the new structure was 4.69 and 2.07.Compared with the traditional structure at each stage，the new differential multi-stage brush seal with the increasing area of the downstream stage can effectively improve the imbalance of pressure drop between stages.Increasing the backing plate protection height could bring about the minimum standard deviation of the equilibrium of pressure drop ratio between different stages of the new structure，and the pressure drop ratio between different stages was close to each other，which can significantly improve the equilibrium of pressure drop between different stages of the new structure.Reducing the thickness of the brush bundle and increasing the clearance between the brush bundle and the rotor surface could make the leakage of the new multi-stage brush seal increase obviously.
- new differential multi-stage brush seals /
- fluid-solid coupling /
- three-dimensional entity modeling /
- interstage pressure drop equalization /
- leakage flow

HTML

参考文献(23)

[1]	李军,李志刚,张元桥,等.刷式密封技术的研究进展[J].航空发动机,2019,45（2）:74-84.
[2]	BAYLEY F J,LONG C A.A combined experimental and theoretical study of flow and pressure distributions in a brush seal[J].Journal of Engineering for Gas Turbine and Power,1993,115（2）:404-410．
[3]	DINC S,DEMIROGLU M,TURNQUIST N,et al.Fundamental design issues of brush seals for industrial applications[J].Journal of Turbomachinery，2002,124（2）:293-300.
[4]	何立东,袁新,尹新.刷式密封研究的进展[J].中国电机工程学报,2001,21（12）:29-33,54.
[5]	FLOWE R R.Brush seal development system[R].AIAA 90-2143,1990．
[6]	王凯杰,杨义勇,索双富,等.两级刷式密封的流动计算与系统参数的配置研究[J].润滑与密封,2017,42（10）:43-47.
[7]	刘璐园,张元桥,李军.基于流固耦合方法的刷式密封刷丝变形及接触力特性的数值研究[J].燃气轮机技术,2019,32（1）:1-7.
[8]	邱波,李军.基于多孔介质局部非热平衡方法的刷式密封耦合传热特性[J].航空动力学报,2015,30（5）:1067-1075.
[9]	邱波,李军,丰镇平.考虑刷丝变形的刷式密封摩擦热效应研究[J].工程热物理学报,2013,34（11）:2030-2034.
[10]	吴施志,江平,力宁,等.刷式密封摩擦生热温度场数值计算及试验[J].航空动力学报,2019,34（4）:737-743.
[11]	邱波,李军.刷式密封传热特性研究[J].西安交通大学学报,2011,45（9）:94-100.
[12]	邱波,李军,冯增国,等.两级刷式密封泄漏特性的实验与数值研究[J].西安交通大学学报,2013,47（7）:7-12.
[13]	孙丹,杜宸宇,刘永泉,等.基于ALE流固耦合方法的刷式密封刷丝接触变形特性理论与试验研究[J].机械工程学报,2020,56（9）:170-180.
[14]	RABEN M,FRIEDRICHS J,FLEGLER J,et al.Brush seals used in steam environments-chronological wear development and the impact of different seal designs[J].Journal of Engineering for Gas Turbines and Power,2016,138（5）:051901.1-051901.10.
[15]	RABEN M,FRIEDRICHS J,FLEGLER J.Brush seal frictional heat generation-test rig design and validation under steam environment[R].ASME Paper GT-2016-56951,2016.
[16]	PUGACHEV A O,DECKNER M.Experimental and theoretical rotordynamic stiffness coefficients for a three-stage brush seal[J].Mechanical Systems and Signal Processing,2012,31:143-154.
[17]	HENDRICKS,R C,GRIFFIN T A,KLINE T R,et al.Relative performance comparison between baseline labyrinth and dual brush compressor discharge seals in a T-700 engine test[R].ASME Paper 94-GT-266,1994.
[18]	文龙,王之栎,丁蕾,等.双级低滞后刷式密封级间不均衡性分析[J].北京航空航天大学学报,2014,40（8）:1154-1159.
[19]	李国勤,孙丹,焦忠泽,等.多级低滞后型刷式密封流动传热特性数值研究[J].风机技术,2019,61（5）:56-63.
[20]	张国强,孙丹,焦忠泽,等.两级刷式密封流动传热特性数值与实验研究[J].风机技术,2020,62（2）:44-52.
[21]	赵欢,焦忠泽,孙丹,等.多级刷式密封级间压降分配影响因素数值与实验研究[J].航空学报,2020,41（10）:79-91.
[22]	孙丹,刘宁宁,胡广阳,等.考虑刷丝变形的刷式密封流场特性力学特性流固耦合研究[J].航空动力学报,2016,31（10）:2544-2553.
[23]	孙丹,卢江,刘永泉,等.篦齿封严风阻温升特性研究[J].航空学报,2018,39（11）:70-79.