Study on Effect of Rotor Vibration on Tip Clearance Variation and Fast Active Control of Tip Clearance

Abstract:

The tip clearance flow of axial turbomachines is important for their aerodynamic and maneuver performance. And the tip clearance gap leakage flow is of continuing concern in reducing efficiency losses that occur within turbines. In order to gain significant reductions in emissions and specific fuel consumption as well as dramatic improvements in operating efficiency and increased service life of aero-engine, variation mechanism of blade tip clearance was analyzed and the equation of dynamic clearance was shown firstly, then the effect of rotor vibration in clearance variation which include flight loads and engine loads was studied in this paper; based on the dynamic measurements of blade tip clearance, a method that ensure tip clearance at optimal state in given mission profile through active rotor vibration control and active tip clearance control was presented. Besides, fuzzy control theory was used to solve the high nonlinear variation of tip clearance. The analysis result shows that this technique is useful.

• Periodical: Advanced Materials Research (Volumes 139-141)
• Pages: 2469-2472
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.139-141.2469
• Online since: October 2010
• Authors: Bing Hui Jia, Xiao Dong Zhang
• Keywords: Active Control, Aero-Engine, Blade Tip Clearance, Flight Maneuver

References

[1] M.W. Wiseman and T. Guo. An Investigation of Life Extending Control Techniques for Gas Turbine Engines, Proceedings of the American Control. Conference, Arlington, VA, June 25-27, (2001).

DOI: 10.1109/acc.2001.946211

[2] S.B. Lattime, and B.M. Steinetz, Turbine Engine Clearance Control Systems: Current Practices and Future Directions, NASA TM 2002-211794, AIAA 2002-3790.

DOI: 10.2514/6.2002-3790

[3] Kevin J. Melcher. Toward a Fast-Response Active Turbine Tip Clearance Control,. 16th International Symposium on Airbreathing Engines sponsored by the International Society for Airbreathing Engines Cleveland, Ohio, (2003)August 31-September 5.

[4] X.M. Qi,Y. Piao and J.Y. Jiao. Numerical analysis of high pressure turbine tip clearance variation. Journal of Jilin University (Engineering and Technology Edition), Jan. 2009, Vol. 39 No. 1(in Chinese).

[5] H.Q. Yuan, X.Z. Zhu and D. Li, etc. Dynamic characteristics of transient thermal starting up of a rotor system, Journal of Vibration and Shock, 2009, No. 7 (in Chinese).

[6] F.S. Lin and G. Meng. Dynamic Characteristics of Maneuvering Rotor in Steady State Motion, China Mechanical Engineering, 2003, No. 19 (in Chinese).

[7] DeCastro, Jonathan A. Rate-Based Model Predictive Control of Turbofan Engine Clearance. Journal of Propulsion And Power, Vol. 23 (2007), No. 4, July-August.

DOI: 10.2514/1.25846