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http://dx.doi.org/10.6108/KSPE.2018.22.4.061

High Frequency Signal Analysis of LOx Pump for Liquid Rocket Engine under Cavitating Condition  

Kim, Dae-Jin (Turbopump Team, Korea Aerospace Research Institute)
Kang, Byung Yun (Turbopump Team, Korea Aerospace Research Institute)
Choi, Chang-Ho (Turbopump Team, Korea Aerospace Research Institute)
Bae, Joon-Hwan (Turbopump Team, Korea Aerospace Research Institute)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.22, no.4, 2018 , pp. 61-67 More about this Journal
Abstract
High-frequency signals are analyzed at the inlet/outlet pipeline and pump casing during cavitation tests of the LOx pump for liquid rocket engines. Root-mean square values of all data are investigated with respect to cavitation number. The values of synchronous, harmonic, and cavitation instability frequencies are also calculated. Pressure pulsations of the inlet and outlet pipelines are affected by cavitation instabilities. The 3x component (i.e., the blade-passing frequency of the inducer) is predominant in the outlet pulsation sensor. This seems to be related to the fact that the number of impeller blades is a multiple of the number of the inducer blades. The cavitation instability is also measured at the accelerometer of the pump casing.
Keywords
Liquid Rocket Engine; LOx Pump; High Frequency Signal Analysis; Pressure Pulsation; Acceleration;
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