Volume 29 Issue 11
Nov.  2014
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Article Navigation >  Journal of Aerospace Power  > 2014  >  29(11): 2579-2586
YANG Dong, LI Shao-bin, LI Qiu-shi. A prediction model for tip clearance of multi-stage axial compressor in different operating conditions[J]. Journal of Aerospace Power, 2014, 29(11): 2579-2586. doi: 10.13224/j.cnki.jasp.2014.11.007
Citation: YANG Dong, LI Shao-bin, LI Qiu-shi. A prediction model for tip clearance of multi-stage axial compressor in different operating conditions[J]. Journal of Aerospace Power, 2014, 29(11): 2579-2586. doi: 10.13224/j.cnki.jasp.2014.11.007
shu

A prediction model for tip clearance of multi-stage axial compressor in different operating conditions

doi: 10.13224/j.cnki.jasp.2014.11.007

  • 1. National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;

  • 2. Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China

  • Received Date: 2014-06-11
  • Publish Date: 2014-11-28
    Abstract
  • A prediction model for tip clearance of multi-stage axial compressors in different operating conditions was proposed, considering the effect of thermal and mechanical loading. The radial and axial temperature distribution across every stage of the multi-stage axial compressors was considered by the proposed model to ensure the accuracy. The model was validated by General Electric Company (GE) E3 engine test results. The comparison shows that the proposed model has high accuracy to uncover the varying rule of tip clearance in different operating conditions, and the relative errors are 0.8%, 5.6%, 3.7% in the calculation of tip clearance for stage 3, 5, and 10, respectively. The estimated trend in the variation of disk cavity cold airflow with tip clearance is consistent with the experimental data, and the relative errors are 9.7% and 6.7% in the estimated tip clearance of stage 3 and 10, respectively. The maximum change of tip clearance obtained with the active control technology in the tests is 0.2032mm at the stage 10, which is estimated as 0.14mm using the model. The magnitude of tip clearance and the tip clearance active control technology effects are estimated quite well, and the proposed model is verified.

     

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