A tip clearance prediction model for multistage rotors and stators in aero-engines  

作　　者：Huibin SUN Jing WANG Kai CHEN Huateng XIA Xin FENG Zhiyong CHANG 

机构地区：[1]Key Laboratory of High Performance Manufacturing for Aero Engine,Ministry of Industry and Information Technology,Northwestern Poly technical University,Xi'an 710072,China [2]AECC South Industry Company Limited,Zhuzhou 412002,China

出　　处：《Chinese Journal of Aeronautics》2021年第2期343-357,共15页中国航空学报（英文版）

基　　金：co-supported by the Equipment Pre-Research Foundation (No. 61409230204);the National Basic Research Project (No. 2017-VII-0010-0104);the Defense Industrial Technology Development Program (No. XXXX2018213A001);the National Natural Science Foundation of China(No. 51875475);the Key Development Program of Shaanxi Province (Nos. 2018ZDXM-GY-068 and 2016KTZDGY4-02)。

摘　　要：Tip clearances of multistage rotors and stators greatly affect aero-engines’ aerodynamic efficiency, stability and safety. The inevitable machining and assembly errors, as well as the complicated error propagation mechanism, cause overproof or non-uniform tip clearances. However, it is generally accepted that tip clearances are difficult to predict, even under assembly state. In this paper, a tip clearance prediction model is proposed based on measured error data. Some 3 D error propagation sub-models, regarding rotors, supports and casings, are built and combined. The complex error coupling relationship is uncovered using mathematical methods. Rotor and stator tip clearances are predicted and analyzed in different phase angles. The maximum, minimum and average tip clearances can be calculated. The proposed model is implemented by a computer program,and a case study illustrates its performance and verifies its feasibility. The results can be referred by engineers in assembly quality judgement and decision-making.

关 键 词：Tip clearance Prediction Error propagation model Rotor and stator AERO-ENGINE Assembly 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]