篦齿容积效应对盘腔空气系统瞬态特性的影响

doi:10.7527/S1000-6893.2021.24989

流体力学与飞行力学

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篦齿容积效应对盘腔空气系统瞬态特性的影响

王磊¹, 毛军逵^1,2, 王龙飞¹, 潘进¹, 邱长波³, 叶大海³, 蔡可信¹

1. 南京航空航天大学能源与动力学院, 南京 210016;
2. 江苏省航空动力系统重点实验室, 南京 210016;
3. 中国航发湖南动力机械研究所, 株洲 412002

收稿日期:2020-11-26 修回日期:2020-12-21 发布日期:2021-01-14
通讯作者: 毛军逵 E-mail:mjkpe@nuaa.edu.cn
基金资助:
国家科技重大专项（2017-Ⅲ-0010-0036）；工信部专项科研项目（MJ-2018-D-21）；中国博士后科学基金（2020TQ0147）

Influence of labyrinth seal volume packing effect on transient characteristics of disc cavity air system

WANG Lei¹, MAO Junkui^1,2, WANG Longfei¹, PAN Jin¹, QIU Changbo³, YE Dahai³, CAI Kexin¹

1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. Jiangsu Province Key Laboratory of Aerospace Power System, Nanjing 210016, China;
3. AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China

Received:2020-11-26 Revised:2020-12-21 Published:2021-01-14
Supported by:
National Science and Technology Major Project (2017-Ⅲ-0010-0036); Specialized Research Project of Ministry of Industry and Information Technology of China (MJ-2018-D-21); China Postdoctoral Science Foundation (2020TQ0147)

摘要/Abstract

摘要： 针对航空发动机中空气系统的瞬态响应问题，以多级封严盘腔为研究对象，开展了考虑篦齿容积效应下的空气系统瞬态计算分析研究。在研究中，采用一维瞬态流体网络计算方法，重点分析了封严篦齿和旋转盘腔的容积效应，并建立了相应的一维瞬态数学模型，通过迭代求解瞬态网络守恒方程组，得到了不同边界工况下盘腔内流体参数随时间响应规律。研究结果表明，由于元件之间的相互作用，上游篦齿元件的容积效应会使得流路下游盘腔内流体参数的响应时间增大，并使温度超调提升。与极端工况相比，过渡工况下腔内平均温度的响应对篦齿容积效应更为敏感，当扰动幅值为1.3时，考虑篦齿容积效应后腔内平均温度响应时间增大10.6%，且温度超调值提升213.7%。

关键词: 盘腔空气系统, 瞬态计算, 容积效应, 响应时间, 温度超调

Abstract: To investigate the transient response of the air system in aero-engine, transient calculation analysis of the air system is carried out considering the volume packing effect of labyrinth seals in a multi-stage sealed disk cavity in this paper. In the research, a one-dimensional transient fluid network calculation method is adopted to explore the volume packing effect of labyrinth seals and the rotating disk cavity, and a corresponding one-dimensional transient mathematical model is established. By iteratively solving the transient network conservation equations, the fluid parameters of air system in the disk cavity responding with time under different boundary conditions are obtained. The results show that due to the interaction between elements, the volume packing effect of the upstream labyrinth seal will increase the fluid parameters response time and promote the temperature overshoot of disk cavity in the flow path downstream. Compared with extreme conditions, the cavity temperature response under transition conditions is more sensitive to the volume packing effect of labyrinth seal. When the disturbance amplitude is 1.3, the temperature response time in the disk cavity increases by 10.6% and the temperature overshoot value increases by 213.7% after considering the volume packing effect of labyrinth seals.

Key words: disk cavity air system, transient calculation, volume packing effect, response time, temperature overshoot

中图分类号:

V231.1

王磊, 毛军逵, 王龙飞, 潘进, 邱长波, 叶大海, 蔡可信. 篦齿容积效应对盘腔空气系统瞬态特性的影响[J]. 航空学报, 2022, 43(2): 124989.

WANG Lei, MAO Junkui, WANG Longfei, PAN Jin, QIU Changbo, YE Dahai, CAI Kexin. Influence of labyrinth seal volume packing effect on transient characteristics of disc cavity air system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(2): 124989.

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篦齿容积效应对盘腔空气系统瞬态特性的影响

Influence of labyrinth seal volume packing effect on transient characteristics of disc cavity air system

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