Work

Effects of Rectangular Trench and Inclined Hole Geometry on Film Cooling Flow and Heat Transfer Characteristics

Year: 2025

Type: article

Abstract: Regarding the cooling structure of gas turbine combustors, this paper employs numerical simulation methods to analyze the influence of structural parameters of a rectangular trench with inclined holes on flow and heat transfer characteristics at a coolant-side Reynolds number of 100,000. The results indicate that with a decrease in the width of the rectangular trench and an increase in the diameter of the inclined holes, the coolant-side friction factor gradually decreases. The coolant-side friction factor at a streamwise distance of Y/D = 30 is lower than that at Y/D = 20 and 40. With an increase in the diameter of the inclined holes, the average coolant-side Nusselt number exhibits a greater increase, indicating significantly enhanced heat transfer effectiveness. The average coolant-side Nusselt number at a streamwise distance of Y/D = 40 is higher than that at Y/D = 20 and 30. Furthermore, with an increase in the diameter of the inclined holes and a decrease in the streamwise distance, the average temperature of the solid wall on the hot-gas side gradually decreases, leading to a progressive improvement in cooling efficiency.

Source: Energies

DOI: 10.3390/en18246441

Authors: Liang Xu, Yifan Wan, Lei Xi, Yunlong Li, Jianmin Gao

Institution: Xi'an Jiaotong University

Language: English

Topic: Turbomachinery Performance and Optimization

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $3,137