A method and device for matching turbine outer ring tip clearance

By constructing a rapid prediction model for turbine outer ring tip clearance and an Actor-Critic strategy network, the accuracy and efficiency issues of turbine outer ring tip clearance in ceramic matrix composite materials were solved, enabling efficient forward design and improving the overall performance of the engine.

CN122413792APending Publication Date: 2026-07-17AECC HUNAN AVIATION POWERPLANT RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AECC HUNAN AVIATION POWERPLANT RES INST
Filing Date
2026-04-03
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies face bottlenecks in accuracy and efficiency when predicting and matching the tip clearance of ceramic matrix composite turbine outer rings, making it impossible to achieve efficient and accurate forward design.

Method used

An optimization strategy based on reward function and reward gradient, combined with deep learning and finite element analysis, is adopted to construct a fast prediction model for turbine outer ring blade tip clearance. The design parameters are optimized through an Actor-Critic strategy network to achieve intelligent matching of blade tip clearance.

Benefits of technology

This technology enables high-precision and rapid prediction and optimization of the blade tip clearance of the outer ring of a ceramic matrix composite turbine, improving the overall efficiency and stability of the engine while reducing computational workload and time.

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Abstract

本发明提供了一种涡轮外环叶尖间隙的匹配方法和装置,方法包括生成一组初始的变量组合,变量组合包含影响叶尖间隙的多个设计参数;基于变量组合,利用预先构建的叶尖间隙快速预测模型,计算得到预测的叶尖间隙;基于预测的叶尖间隙与优化目标,通过奖励函数计算当前变量组合的奖励值,判断是否达到优化目标;若未达到优化目标,基于奖励值梯度的优化策略,生成新的变量组合,并返回步骤四;若达到优化目标,则输出当前满足优化目标的变量组合作为最终的设计参数。通过构建各向异性导热系数矩阵和基于粗糙度、温度的经验接触热阻关系式,精确刻画了独特传热行为及其与金属机匣间的复杂耦合效应。这使得模型的预测结果具有物理可解释性和高精度。
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