Technique for recording and analysis of the amplitude spectrum of the strength oscillations of magnetic and electric fields of combustion products in a model liquid rocket engine fuel depending on the combustion chamber pressure
Abstract:
The technique and results of the correlational and spectral analyses of the electrophysical characteristics of the combustion products of oxygen- and kerosene-based fuel, recorded with noncontact primary-measuring electromagnetic transducers during the firing tests of a model liquid rocket engine, are presented. A technique is developed for secondary processing sets of electromagnetic field parameters for the correlational and spectral analyses of a duty parameter $($combustion chamber pressure$)$ and a parameter to be determined $($strength of the electromagnetic field of the combustion products$)$ in the $0$–$28$ kHz range. The maximums of the amplitude spectrum of signals from the magnetic and electric field sensors at frequencies of $114$ and $49$ Hz, respectively, are determined, and a near-linear $($with the correlation coefficient of $0.863)$ dependence of the amplitude of the strength oscillations of the magnetic field of the combustion products on the combustion-chamber pressure in the model liquid-fuel rocket engine, which can be used for the diagnostics of the working process parameters in the chamber of a liquid rocket engine, is derived.
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