Session: 12-05 Conjugate heat transfer investigations

Paper Number: 129340

129340 - Development of a Reduced Order Model for Double Wall Liner Cooling Schemes 

The cooling schemes for gas turbine engines have been evolved over years. One of the most promising schemes is called as double-wall cooling schemes, which is combination of the impingement and effusion cooling schemes. In this scheme, the coolant air first hits to the plate through the impingement holes and then covers the surface as creating the cooling film by passing the effusion holes. However, numerical modeling of this application brings two times higher cooling holes and it increases computational time remarkably.

For this purpose, a one-dimensional solver is developed to predict adiabatic film cooling and metal temperature values to reduce the computational cost and make better predictions before using the numerical models. Effusion cooling is modeled by using single hole film cooling correlations, that includes effect of the lateral hole displacements and blowing ratio, are combined with Seller’s superposition method to represent a staggered hole arrays in axial direction. The effect of the impingement cooling is accounted as a source term concerning to radial distance between the plates and hole distributions. Several test cases, which includes different blowing ratio, thermal conductivity, coolant hole sizes and distributions, are modeled and compared with the test cases experimental data to validate the one-dimensional solver. In addition, conjugate heat transfer (CHT) analysis are performed to observe film cooling trends and feeding the one-dimensional solver for cases where the blowing ratio is beyond correlation ranges. One-dimensional solver and CHT results are compatible with experimental results for different cases, and the one-dimensional method is highly encouraging to predict metal temperature before the design.

Presenting Author: Zeki Tugberk Karasu TEI

Presenting Author Biography: Zeki Tuğberk Karasu, M.Sc.

After graduating from mechanical engineering in Dokuz Eylul University in 2019, Karasu started his master's degree in heat transfer and fluid mechanics at Istanbul Technical University. He received the title of master's mechanical engineer in 2022. During his master's degree, he worked as a turbine thermal system design engineer at Tusas Engine Industries (TEI) from 2021 to 2023. During this time, He wrote conference papers on secondary flows in gas turbine engines to be published in the ASME organization. He has been working as an afterburner aerothermal engineer since 2023. In particular he works on innovative technologies for cooling designs and aero designs of afterburner engines.

Authors:

Zeki Tugberk Karasu TEI
Fırat Kıyıcı TEI
Erinc Erdem TEI