Abstract. A method was proposed for testing additively manufactured low-thrust hydrogen-oxygen rocket engines by video monitoring of the exhaust plumes in the submerged area near the nozzle. The tests started from propellants ignition at low supply rates, followed by increase up to 5 g/s of hydrogen and 20 g/s of oxygen. The choice of the spectral band allowed to detect optical emission of engine deterioration products. The images of the jet were recorded through bandpass filters and have been studied. Visual assessments of the engine condition were done after the tests. Brightness and duration of flares in jets were chosen as the main parameters and calculated from the graphic data. Their values allowed comparison of engine degradation rates during the tests.

Keywords: low thrust rocket engine, structural failure, combustion products, optical diagnostics, diagnostic parameters

For citation: Levikhin A. A., Musteikis A. I., Kolosenok S. V., Kolosenok A. S. Selection of diagnostics parameters for fault detection by rocket plume emission. Aerospace Engineering and Technology. 2023. Vol. 1, no. 4, pp. 67–81. EDN JHILPV