Session: 13-11 Advanced Methods (II)

Paper Number: 127175

127175 - 3D Temperature Evaluation of the Vane Based on Fluid-Network Method 

With the continuous increase of inlet temperature of gas turbines, the design of turbine blade cooling structures faces enormous challenges. Fluid-network method is widely used in the initial stage of blade design due to its advantages of high speed and high precision. However, traditional fluid-network method fails to consider the conjugating effect of internal and external cooling, making it difficult to ensure its accuracy and requiring improvement.

This paper presents a fluid-network method that considers the conjugating effect of internal and external cooling. This method considers the cooling structure of blades into topological elements, directly solves the momentum and energy equations of the elements, and combines correlations summarized from experimental data to quickly and accurately obtain the pressure, mass flow rate, temperature, and heat transfer coefficient distribution of the internal and external cooling elements of blades. Due to the consideration of the thermal conductivity of the elements, this method can better reflect the influence of conjugating effects and has higher solving accuracy compared to traditional fluid-network method. This paper uses typical aviation turbine vane and blade for comparison and verification. Compared with traditional fluid-network method, the calculation error of this method is reduced to less than 5%. In conclusion, this method helps to quickly predict the cooling efficiency of different blade cooling structure layout modes in the initial stage of blade design, while also predicting the solid temperature distribution of the blades, in order to screen out advantageous cooling structure layouts with high cooling efficiency and low stress, providing support for the next generation of high-performance turbine design.

Presenting Author: Siyuan Zhang Tsinghua University

Presenting Author Biography: Siyuan Zhang is a PhD student studying in the Gas Turbine institute of Tsinghua University. She focuses on the development of the design method of turbine cooling structures and the next generation cooling technology of turbine vane, double wall cooling.

Authors:

Siyuan Zhang Tsinghua University
Xueying Li Tsinghua University
Jing Ren Tsinghua University