Active Control System of Turbine Tip Clearance
The tip clearance is one of the most concerned aspects of aero-engine’s reliability and performance.Recent technological advances in the field of active clearance control promise to minimize the tip clearance lOSS without the adverse tip shrouding effects.This paper is most focused on the design of active controI system of turbine tip clearance without the tip sensors.which limit the practical applications because the reliability and intensity can not reach the requirements of aero-engine.Composed of the existing sensor equipments,the active controI system.with advanced tip clearance analysis programs embedded in the computer on wing,calculates the Real.time tip clearance to controI the Execution implements.By the means of fiinite element method.this paper calculate the changes of the tip clearance of one aero-engine’s high pressure turbine(HPT).With the contrast of former methods,some reasonable conclusions have been reached as foHows：There are two pinch points of minimum tip clearance in first acceleration and hot re.burst acceleration.respectively.The RPM is the key issue for the distortion of turbine disc.While the temperature is the key point of shroud and blades.
Active control system Tip clearance Finite element method HPT Aero-engine
QI Xing-Ming PIAO Ying
国际会议
The International Conference Information Computing and Automation(2007国际信息计算与自动化会议)
成都
英文
781-784
2007-12-19（万方平台首次上网日期，不代表论文的发表时间）