Диагностика Разрушений И Оценка Эксплуатационной Работоспособности Рабочих Турбинных Лопаток Авиационных Двигателей

Kiselev, F. D.

doi:10.34759/vst-2019-4-108-122

Cited by 3 publications

(1 citation statement)

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“…The main methods of non-destruction control of blades of aircraft engines are examined in details in the works [4,5]. The technique and technology of destruction diagnostics in aircraft turbine blades are considered in the researches [6,7]. Early assessment of defects in the components of turbine equipment is also one of directions in revealing damages at present time [8].…”

Section: Introductionmentioning

confidence: 99%

Optimal distribution of capsules with active substance for the crack detection system in a turbine blade body

Andrianov,

Chepurnova

2023

cisisr

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This research is devoted to optimization of the detection system for damages of blades of a gas turbine engine in non-stationary conditions. The system is based on the approach on the method, when capsules with active substance are placed in a steel blade body, then a capsule is bursting due to difference of pressures during the process of crack propagation; as a result, ejected active substance is registered. The problem of this research is connected with optimal distribution of capsules, which contain active substance, in a turbine blade body. The research technique was developed for a modeling problem, when a steel turbine blade with constant cross section, having tensile crack and subjected to the action of extension centrifugal force, was observed. Development of the model with optimal distribution of capsules was based on assessment of pre-critical crack growth: it was required to distribute the capsules along the median line of blade cross section in such way, that it would be possible to detect the crack of pre-critical growth. Analysis of ultimate state of a blade with crack was carried out on the base of stress intensity coefficient, which allows to take into account the feature of crack location and to determine its critical length when its accelerated growth takes place. Variation of the pressure inside a capsule, required for its bursting depending on opening of crack sides. The suggested model takes into account location of the capsule with active substance relating to crack opening sides. Calculation of minimal number of capsules in blade bode depending on pressure inside the capsule and rotating speed of blades was conducted on the example of the steel turbine blade R-5530 B. The obtained dependences allow us to find the optimal combination between the geometric and physical characteristics of the crack detection system and the minimal number of capsules. The application of the proposed approach to the optimal distribution of capsules along the median line of the blade cross section will increase the efficiency of use of the damage detection system in turbine blades in non-stationary conditions, thereby ensuring the safety of operation of gas turbine engines in aviation technology.

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Section: Introductionmentioning

confidence: 99%

Optimal distribution of capsules with active substance for the crack detection system in a turbine blade body

Andrianov,

Chepurnova

2023

cisisr

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Numerical Study of Influence of Inclined Crack Geometrical Characteristics in a Turbine Blade of the R-2617a Profile on a Failure Pressure in the Damage Detection System

Andrianov,

Grinkrug,

Kara Bally

2024

Russ. Aeronaut.

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To the method of calculation of the main characteristics of promising booster electric pump units of liquid processor engines

Dubynin,

Tolstopyatov,

Zuev

et al. 2023

Siberian Aerospace Journal

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The increase in the capacity of electric power sources, the use of electric motors in the systems for supplying rocket fuel components from foreign companies, the limitations on the power of classical fuel supply systems all these conditions set a trend for studying the possibility of introducing electric drives for rocket engine power systems. The study is devoted to the analysis of the possibility of using electric motors as a drive for the main and auxiliary pumps of liquid rocket engines. Promising developments in the field of rechargeable batteries give grounds for a mathematical justification for the use of this technical solution in order to modernize power systems, both existing rocket engines and samples under development. The article presents a selection of patents for modern technologies for creating high-capacity batteries, an analysis of the use of technology for the use of electric motors in the international market for delivering payloads to orbits, and a rationale for the prospects of this direction in the development of rocket engines. The statistics of the causes of failures of upper stages and their correlation with units, which can be replaced by more reliable systems using electric motors, have been studied. The advantages and disadvantages of power supply systems with the use of electric drives are determined. This study allows us to conclude that the use of electric motors in rocket engine power systems is a promising solution that improves the efficiency of the propulsion system, performance and reliability.

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Диагностика Разрушений И Оценка Эксплуатационной Работоспособности Рабочих Турбинных Лопаток Авиационных Двигателей

Cited by 3 publications

References 0 publications

Optimal distribution of capsules with active substance for the crack detection system in a turbine blade body

Optimal distribution of capsules with active substance for the crack detection system in a turbine blade body

Numerical Study of Influence of Inclined Crack Geometrical Characteristics in a Turbine Blade of the R-2617a Profile on a Failure Pressure in the Damage Detection System

To the method of calculation of the main characteristics of promising booster electric pump units of liquid processor engines

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