旋流和风阻温升下压气机级间篦齿封严空气网络计算模型

孙科; 刘高文; 孔晓治; 雷昭

doi:10.13224/j.cnki.jasp.2018.06.009

旋流和风阻温升下压气机级间篦齿封严空气网络计算模型

doi: 10.13224/j.cnki.jasp.2018.06.009

西北工业大学动力与能源学院,西安 710072

基金项目: 国家自然科学基金（51476133)

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出版历程
- 收稿日期: 2016-11-30
- 刊出日期: 2018-06-28

Network model for calculation of labyrinth seal in compressor stator well with swirl flow and windage heating

摘要

摘要: 以压气机级间篦齿封严结构为研究对象,将封严系统简化为典型元件组成的空气网络,建立相应的元件流动特性计算模型。篦齿封严泄漏特性计算模型中没有考虑旋流和风阻温升影响的问题。特别采用一维流基本方程组进行描述旋转盘腔内的旋流,转子壁面摩阻应用经验关系式计算,方程组采用龙格-库塔法求解。旋转盘腔一维工程计算获得其旋流速度和风阻温升分布。根据旋流速度的大小,采用面积修正法对篦齿封严的泄漏特性计算方法进行了修正,并通过考虑流体物性随沿程温度变化来考虑风阻温升的影响。考虑旋流与温升的泄漏流量计算结果与数值计算结果最大相差1.4%,而不考虑旋流及风阻温升时最小偏差为9.9%,最大偏差为20.1%。一维工程计算结果与实验结果进行了对比,两者吻合良好,相对偏差不超过7%。计算中采用实测的篦齿间隙,该间隙通过在旋转篦齿实验中测量转子的转动变形与受热膨胀,以及机匣的热变形而获得。
- 级间 /
- 篦齿封严 /
- 空气网络计算模型 /
- 旋流 /
- 风阻温升
Abstract: The labyrinth seal in a compressor stator well was simplified to one-dimensional network model consisting of typical elements. Then the computational models for these elements were built. The present model for the leakage calculation of labyrinth seal didnt consider swirl flow and windage heating impacts. One-dimensional basic equations were used to describe the swirl flow in rotating disc cavity. And empirical correlations were used to calculate the rotor wall friction. Runge-Kutta method was employed to solve these equations about circumferential velocity and windage heating of the rotating flow. An area correction method with swirl flow was adopted, and windage heating made the change of airflow properties. The relative deviation of leakage flow rate result of one-dimensional network and CFD was less than 1.4% with swirl flow and windage heating. Without swirl flow and windage heating, the relative deviation was more than 9.9% and less than 20.1%. Compared with the experimental results, the one-dimensional network calculation results agreed well with each other, the relative deviation was no more than 7%. one-dimensional network calculation took the practical working tip clearance of the labyrinth seal. In rotating labyrinth seal experiment，the practical clearance was obtained by measuring the radial displacement of rotor caused by rotation and thermal deformation as well as the radial displacement of casing caused by thermal deformation.
- stator well /
- labyrinth seal /
- network model /
- swirl flow /
- windage heating

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参考文献(20)

[1]	吴大观.斯贝MK202发动机技术设计:EGD-6［M］.西安:国营红旗机械厂,1982.
[2]	吴丁毅.内流系统的网络计算法［J］.航空学报,1996,17(6):16-20.WU Dingyi.Network technique of internal system［J］.Acta Aeronautica et Astronautica Sinica,1996,17(6):16-20.(in Chinese)
[3]	MULLER Y.Secondary air system model for integrated thermomechanical analysis of a jet engine［R］.ASME Paper 2008-GT-50078,2008.
[4]	侯升平,陶智,韩树军.非稳态流体网络方法在发动机空气冷却系统中的应用［J］.航空动力学报,2009,24(3):494-498.HOU Shengping,TAO Zhi,HAN Shujun,et al.Application of unsteady fluid network to air cooling system in engine［J］.Journal of Aerospace Power,2009,24(3):494-498.(in Chinese)
[5]	郭晓杰.航空发动机空气系统与热分析耦合方法研究［D］.上海:上海交通大学,2014.GUO Xiaojie.Coupling computational approach of secondary air system and heat transfer in aero-engine［D］.Shanghai:Shanghai Jiao Tong University,2014.(in Chinese)
[6]	胡肖肖,李育隆,吴宏,等.基于蒙特卡罗法的航空发动机稳态空气系统网络计算［J］.航空发动机,2014,40(6):28-32.HU Xiaoxiao,LI Yulong,WU Hong,et al.Aeroengine steady air system calculation based on Monte Carlo method［J］.Aeroengine,2014,40(6):28-32.(in Chinese)
[7]	BENRA F K,DOHMEN H J,SCHNEIDER O.Application of an enhanced 1D network model to calculate the flow properties of a pre-swirl secondary air system［R］.ASME Paper 2008-GT-500442,2008.
[8]	吴宏,李澎,陶智.直齿直通式篦齿封严计算模型［J］.航空动力学报,2012,27(10):2180-2187.WU Hong,LI Peng,TAO Zhi.Rectangular tooth straight through labyrinth seal analytical model［J］.Journal of Aerospace Power,2012,27(10):2180-2187.(in Chinese)
[9]	吕亚国,刘振侠,黄生勤.航空发动机内流空气系统通用分析软件设计［J］.计算机仿真,2009,26(7):99-103.L Yaguo,LIU Zhenxia,HUANG Shengqin.General analysis software design of aeroengine internal air system［J］.Compuer Simulation,2009,26(7):99-103.(in Chinese)
[10]	潘耘峰.燃气透平冷却空气系统流体网络法研究［D］.北京:中国科学院,2011.PAN Yunfeng.Investigation on fliud network method for the analysis of turbine air cooling system［D］.Beijing:Chinese Academy of Sciences,2011.(in Chinese)
[11]	陆霄露.内燃机一维流动计算方法研究及性能仿真软件设计［D］.上海:上海交通大学,2014.LU Xiaolu.Computational study on one-dimensional fluid flow and desing of performance simulation software for internal combustion engine［D］.Shanghai:Shanghai Jiao Tong University,2014.(in Chinese)
[12]	纪国剑,吉洪湖,黄云霞,等.直通篦齿蜂窝封严结构的风阻特性试验［J］.航空动力学报,2011,26(12):2655-2660.JI Guojian,JI Honghu,HUANG Yunxia,et al.Experiment investigation of windage heating on straight-through labyrinth seals with honeycomb bush［J］.Journal of Aerospace Power,2011,26(12):2655-2660.(in Chinese)
[13]	CHOUGULE H H,RAMERTH D.Low leakage designs for rotor teeth and honeycomb lands in labyrinth seals［R］.ASME Paper 2008-GT-51024,2008.
[14]	WEINBERGER T,DULLENKOPF K,BAUERH J.Influence of honeycomb facings on the temperature distribution of labyrinth seals［R］.ASME Paper 2010-GT-22069,2010.
[15]	SOEMARWOTO B I,KOK J C,COCK K M J D,et al.Performance evaluation of gas turbion labyrinth seals using computational fluid dynamics［R］.ASME Paper 2007-GT-27905,2007.
[16]	刘高文,陈凯,刚铁,等.压比和雷诺数对压气机级间篦齿封严流动特性的影响［J］.航空动力学报,2015,30(7):1554-1560.LIU Gaowen,CHEN Kai,GANG Tie,et al.Influences of pressure ratio and Reynolds number on flow characteristics of labyrinth seal in compressor stator well［J］.Journal of Aerospace Power,2015,30(7):1554-1560.(in Chinese)
[17]	刘高文,孔晓治,陈凯，等.转动和旋流对压气机级间封严影响的数值研究［J］.推进技术,2014,35(12):1687-1693.LIU Gaowen,KONG Xiaozhi,CHEN Kai,et al.Numberical study for effects of rotation and swirl on lab sealing in a compressor stator well［J］.Journal of Propulsion Technology,2014,35(12):1687-1693.(in Chinese)
[18]	ZIMMERMANN H,WOLFF K H.Air system correlations：Part 1 labyrinth seals［R］.ASME Paper 98-GT-208,1998.
[19]	HASSER F,JACK J,MCGREENHAN W.Windage rise and flowpath ingestion in turbine rim cavities［R］.ASME Paper 87-GT-164,1987.
[20]	KONG Xiaozhi,LIU Gaowen,LIU Yuxin,et al.Investigation on the leakage flow,windage heating and swirl development of rotating labyrinth seal in a compressor stator［R］.ASME Paper 2016-GT-56740,2016.