Molecular contamination of spacecraft surfaces in thermostatic control and orbital injection of launch vehicle nose cone

1Shuvalov, VA, 2Tikhii, VG, 3Potapovych, LP, 4Priymak, AI, 1Pismennyi, NI, 4Kochubey, GS
1Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Dnipro, Ukraine
2Yangel Yuzhnoye State Design Office, Dnipropetrovsk, Ukraine
3Yuzhnoye State Design Office, Dnipro, Ukraine
4Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Dnipropetrovsk, Ukraine
Kosm. nauka tehnol. 2007, 13 ;(3):003-011
Publication Language: Russian
We developed calculation and experimental procedures for engineering evaluation of surface roughness levels and mass of spacecraft molecular contamination level in thermostatic control of the Dnepr LV's nose cone by high-pressure air and in orbital injection of the space head module. It is shown that spacecraft surface molecular contamination corresponds to А/65ξ, ≤ А/25 levels in thermostatic control of the space head module by air of a purity class of 5000, and the particle mass of condensed phase of volatile compounds deposited on spacecraft surfaces during 930 seconds of flight is within 0.333 ≤ M ≤ 2.690 mg/m2 in orbital injection, which is not worse than a purity level of ξ А/3.6 according to the MILSTD 1246C standard.
Keywords: molecular contamination level, spacecraft, thermostatic control
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