Core shift limitation in investment casting process of hollow turbine blade  

作　　者：Kang CUI Lin JING Ruisong JIANG Longnv YU Xiao GAO 

机构地区：[1]Automation and Software Engineering,Shanxi University,Taiyuan 030006,China [2]Key Laboratory of High Performance Manufacturing for Aero Engine,Ministry of Industry and Information Technology,School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China [3]School of Mechanical Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Chinese Journal of Aeronautics》2024年第8期513-526,共14页中国航空学报（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.52005311);the Scientific and the National Science and Technology Major Project(Grant No.J2019-VII-0013-0153);Research Project Supported by Shanxi Scholarship Council of China(Grant No.2023-003).

摘　　要：The deviation in wall thickness caused by core shift during the investment casting process significantly impacts the strength and service life of hollow turbine blades.To address this issue,a core shift limitation method is developed in this study.Firstly,a shift model is established based on computational fluid dynamics and motion simulation to predict the movement of the ceramic core in investment casting process.Subsequently,utilizing this model,an optimization method for fixturing layout inside the refractory ceramic shell is devised for the ceramic core.The casting experiment demonstrates that by utilizing the optimized fixture layout,not only can core shift during the investment casting pouring process be effectively controlled,but also the maximum wall thickness error of the blade can be reduced by 42.02%.In addition,the core shift prediction is also validated,with a prediction error of less than 26.9%.

关 键 词：Hollow turbine blade Wall thickness Ceramic core Shift prediction Fixturing layout optimization 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]