Pequliarities of mathematical modeling of low-frequency dynamics of the staged liquid rocket sustainer engines at its startup

1Pylypenko, OV, 2Prokopchuk, AA, 1Dolgopolov, SI, 2Pisarenko, VYu., 2Kovalenko, VN, 1Nikolaev, AD, 1Khoryak, NV
1Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Dnipropetrovsk, Ukraine
2Yangel Yuzhnoye State Design Office, Dnipro, Ukraine
Space Sci.&Technol. 2017, 23 ;(5):03-13
https://doi.org/10.15407/knit2017.05.003
Section: Space Energy, Power and Propulsion
Publication Language: Russian
Abstract: 
We present a new mathematical model for startup of staged liquid rocket engines (LRE). It is based on the improving the mathematical models of low-frequency dynamics of cavitating pumps and gas LRE channels as well as on the introducing the process of injecting gaseous oxygen into the liquid oxygen stream in the LRE feed. We describe a mathematical simulation of the l startup of the prospective sustainer LRE of 250 ton-force thrust, which is being developed at the SE "Yuzhnoye" Design Office (Dnipro, Ukraine).
Keywords: liquid rocket engine, low-frequency dynamic processes, pump cavitation, startup
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