Aircraft engine state nonobstructive electrostatic monitoring: theoretical and laboratory modelling

Vatazhin, A. B.; Golentsov, D. A.; Likhter, V. A.; Shulgin, Vyacheslav

doi:10.1016/s0304-3886(97)00120-4

Cited by 12 publications

(9 citation statements)

References 1 publication

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“…The frequency of the peak will increase with the velocity of the charged particles, however. The existence of a similar maximum frequency fmax was also found in [85], where it was named VI/VII by the authors.…”

Section: Feature Extractionsupporting

confidence: 56%

A review of electrostatic monitoring technology: The state of the art and future research directions

Zhang

Hou

Atkin

2017

Progress in Aerospace Sciences

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Electrostatic monitoring technology is a useful tool for monitoring and detecting component faults and degradation, which is necessary for system health management. It encompasses three key research areas: sensor technology; signal detection, processing and feature extraction; and verification experimentation. It has received considerable recent attention for condition monitoring due to its ability to provide warning information and non-obstructive measurements on-line. A number of papers in recent years have covered specific aspects of the technology, including sensor design optimization, sensor characteristic analysis, signal de-noising and practical applications of the technology. This paper provides a review of the recent research and of the development of electrostatic monitoring technology, with a primary emphasis on its application for the aero-engine gas path. The paper also presents a summary of some of the current applications of electrostatic monitoring technology in other industries, before concluding with a brief discussion of the current research situation and possible future challenges and research gaps in this field. The aim of this paper is to promote further research into this promising technology by increasing awareness of both the potential benefits of the technology and the current research gaps.

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Section: Feature Extractionsupporting

confidence: 56%

A review of electrostatic monitoring technology: The state of the art and future research directions

Zhang

Hou

Atkin

2017

Progress in Aerospace Sciences

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“…Распределение концентраций положительно заряженных ионов и электронов в истекающей струе ПС обусловливает образование собственного электрического поля и индуцированного магнитного поля, параметры которых описываются системой уравнениями Максвелла [10]. Применив метод размерностей к данной системе уравнений, можно оценить уровень напряженности магнитного поля (НМП), создаваемого электрическим зарядом в струе продуктов сгорания, истекающих из сопла МЖРД…”

Section: оценка электрического заряда в струе продуктов сгорания мжрдunclassified

“…производились с помощью электростатических зондов и систем цилиндрических электродов, которые требуют непосредственного контакта с высокотемпературным газом (датчикизонды) или достаточно массивны (система цилиндри-ческих электродов) для использования на двигателях больших тяг. Экспериментальные работы [7][8][9][10] показали принципиальную возможность проведения электростатической диагностики авиационных двигателей и основывались на регистрации потенциала, напряженности и конвективного тока в зависимости от режимных параметров двигателя. Однако нестационарное движение ионов, электронов и заряженных частиц в струе может вызывать появление не только электрических полей, но и индуцировать магнитное поле, напряженность которого связана со скоростью и концентрацией ионов в струе.…”

Section: Introductionunclassified

Экспериментальное Исследование Рабочего Процесса В Жидкостных Ракетных Двигателях С Использованием Электрофизического Метода Диагностики

Бобров¹,

Рудинский²,

Пушкин³

et al. 2020

Журнал Технической Физики

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An experimental study of the electromagnetic field generated by the low-temperature plasma of the fuel combustion products of a model liquid rocket engine was carried out. The components of the fuel were gaseous oxygen and ethyl alcohol. When simulating emergencies in the operation of a model rocket engine, the own electromagnetic field strength generated by the ionized fuel combustion products was recorded. A linear dependence of the magnetic field strength on the pressure in the combustion chamber is established in the range of 2.2-3.5 MPa. The possibility of using non-contact electrophysical methods for diagnosing the working process in power plants of aircraft using the value of the magnetic field strength as a “useful” signal is shown.

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“…An increasing amount of literature on the methodologies, applications, and experiments of the electrostatic monitoring technology has been presented in the recent years. Varazhin et al [11][12][13][14][15][16] presented the theoretical method, laboratory modeling and simulation of electrostatic monitoring for engine in his studies. The electrostatic monitoring technology was also used in engine diagnostics through monitoring the overall electrostatic charge level.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on electrostatic monitoring technology for civil turbofan engine

Yin¹,

Cai²,

Zuo³

et al. 2017

J. vibroeng.

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This study analyzes the necessity, development, and principles of aero-engine electrostatic monitoring technology. An electrostatic sensor with specific size is assembled in the exhaust nozzle of an RB-211 turbofan engine located near the low-pressure turbine outlet, a stress checking procedure for safety is conducted. Two test program cycles are included in the whole experimental process. Electrostatic signal processing flow is presented, and feature parameters used for analysis are root-mean-square (RMS), activity level (AL), negative event rate (NER), positive event rate (PER), kurtosis, impulse factor, and absolute mean value. Thrust is used to parameterize the working conditions of the turbofan engine. Moreover, data fitting is conducted to determine the relations between feature and performance parameters. Accordingly, lubrication oil leakage fault and fuel-rich combustion condition are detected in two test run cycles, which result in the appearance of abnormal signals. The AL, RMS, and absolute mean values exhibit similar trends with the change in thrust. A positive linear correlation is also observed between the AL and the thrust in the varying thrust test period. The method of blade-casing rubbing fault recognition is discussed. Experiment results show that the electrostatic sensor is very sensitive to large-sized charged particles in the exhaust emissions.

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Aircraft engine state nonobstructive electrostatic monitoring: theoretical and laboratory modelling

Cited by 12 publications

References 1 publication

A review of electrostatic monitoring technology: The state of the art and future research directions

A review of electrostatic monitoring technology: The state of the art and future research directions

Экспериментальное Исследование Рабочего Процесса В Жидкостных Ракетных Двигателях С Использованием Электрофизического Метода Диагностики

Experimental investigation on electrostatic monitoring technology for civil turbofan engine

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