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Д.А. Ягодников, А.В. Сухов, Н.Я. Ирьянов, В.И. Лапицкий, С.А. Гришин, А.А. Бунчук
16
Инженерный журнал: наука и инновации
# 1·2017
Correlation and spectral analyses
of electrophysical characteristics of hydrocarbon
fuel exhaust products in a model liquid rocket engine
D.A. Yagodnikov
1
, A.V. Sukhov
1
,
N.Ya. Iryanov
1
, V.I. Lapitskiy
1
,
S.A. Grishin
2
, A.A. Bunchuk
2
1
Bauman Moscow State Technical University, Moscow, 105005, Russia
2
SSPA “Optics, Optoelectronics and Laser Technology”,
Minsk, 220072, Republic of Belarus
The article presents the methodology and results of correlation and spectral analysis of
electrophysical characteristics of kerosene and oxygen combustion products registered in
the process of bench firing tests of the model liquid rocket engine (LRE) with the primary
sensors of the electromagnetic field. Mathematical apparatus and techniques of second-
ary processing arrays of electromagnetic field characteristics were developed for the
frequency correlation analysis in the range of 0…28 kHz of an operating condition - the
pressure in the combustion chamber and a defined parameter — the magnetic field
strength of the combustion products. It is found (with correlation coefficient 0.863) that
the dependence of magnetic field strength of the combustion products beyond the nozzle
on the pressure in the model LRE combustion chamber is close to linear. This depend-
ence can be used as a diagnostic feature for creating a high-speed emergency LRE pro-
tection system.
Keywords
: liquid rocket engine, firing tests, diagnostics, electromagnetic field, correla-
tion and spectral analyses
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