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The peculiarities of applying CAD/CAE systems for the primary combustion chamber flame tube cycle life prolongation of the tactical military aircraft afterburning turbofan jet engine

100%

Pashchenko S. , Kharchenko O. , Shulhin A. , Chemerys Y.

Journal of KONBiN

2022

tom Vol. 52, iss. 4

167--176

In this article, the computational simulation of the workflow in the primary combustion chamber flame tube of the afterburning turbofan jet engine (ATJE) on the tactical military aircraft was carried out. The geometric model of a flame tube was created and adapted to perform the interrelated calculation of the thermal and stress-strain behaviour of the walls of the flame tube influenced by the operational loads during the computational simulation of the workflow. Quantitative and qualitative analysis of the simulation results was conducted, and the connection between the peculiarities of the workflow and the characteristic damage of the flame tubes, detected during the operation, was established. The possibility of using modern CAD/CAE systems to solve the scientific tasks towards maximizing the cycle life potential of the main and primarily important components of the ATJE on the assessment basis of their damage exhaustion degree was determined.

The operational technique of increasing service life time of the major components of the fighter aircraft engine rotors

88%

Pashchenko S. , Shulhin A. , Samuleev V. , Lobunko О. , Dobridenko О.

Journal of KONBiN

2021

tom Vol. 51, iss. 3

65--73

The operational technique for the major components of the fighter aircraft engine rotors has been introduced basing on the real conditions of their cyclic loading in each flight or ground test and a priori information on their previous operation. It has been confirmed that the obtained technical solutions not only conform to the current methods of accounting for the depletion of the life cycle of the Afterburning Turbofan Engine (ATE) but also introduce additional opportunities to consider individual characteristics and conditions of their cyclic loading throughout the overall operating time. A method for estimating the depletion of the life cycle in accordance with the Total Accumulated Cycle (TAC) has been proposed. It allows us to compare the actual operating time of the ATE in hours and the accumulated value of cyclic damage to the engine and its major components (within the TAC parameter) during the previous operation.

Numerical simulation of workflow for evaluating flame tube thermocyclic durability

88%

Shulhin A. , Chemerys Y. , Loginov V. , Kharchenko V. , Tulenko I.

Transactions on Aerospace Research

2024

tom Nr 2 (275)

33--43

This paper explores strategies for extending the operational lifespan of flame tubes in turbofan engines - a critical component for maintaining engine efficiency and reliability, in line with global trends aimed at maximizing the use of laid reserves of aircraft engine performance. Utilizing a combination of advanced computational simulations and empirical research, the study meticulously analyzes the internal processes within the flame tube of the AL-31F turbofan engine. A detailed geometric model and finite element grid were created and adapted to simulate various operating conditions and assess their impact on the flame tube’s performance. Special attention is given to understanding the thermal and mechanical stresses that influence its durability and serviceability. The results, compared against experimental data, validate the simulations and are crucial for identifying critical sections prone to damage, thereby facilitating enhanced decision-making regarding maintenance schedules and overhaul practices. This approach not only aims to minimize downtime and reduce maintenance costs but also extends the service intervals for critical engine components, thereby improving thermocyclic durability based on the damage mechanisms identified.