Evaluation of the relationship between the aerothermodynamic process and operational parameters in the high-pressure turbine of an aircraft engine

Autor: Phuong Tri Nguyen, Trung Hieu Nguyen, François Garnier
Rok vydání: 2019
Předmět:
Zdroj: Aerospace Science and Technology. 86:93-105
ISSN: 1270-9638
DOI: 10.1016/j.ast.2019.01.011
Popis: Gaining a full understanding of the aerothermodynamic (AT) process in the high-pressure turbine of an aircraft engine is a complex task. The data in the literature on this topic are very limited, particularly that on tridimensional simulation. We report herein, for the first time, the designs, computer simulations, tridimensional calculations of the interactions of AT parameters under various operation conditions (takeoff, cruise) of an aircraft engine by using a refined mesh system containing approximately 6 million polyhedrons and more than 1 million interactions to solve equations in a high-pressure turbine (HPT). Our research provides, for the first time, an overview of high-resolution topographic images of the distribution of AT parameters in multi-row turbomachinery. Our calculations indicate that the relationship between these parameters was convoluted and depended on each operating condition. For example, our findings show that the thermal boundary conditions and rotor speeds strongly affected the flow temperatures (14%) and flow velocity (31%). On the other hand, the cooling system appeared not to affect AT parameters. The temperature nonuniformities in the turbine in the axial and radial directions were also observed.
Databáze: OpenAIRE
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