Approach to solution of tank with hydrogen peroxide pressurization by its decomposition products

Heading: 
Space Energy, Power and Propulsion
1Andriievskyi, MV, 2Mitikov, Yu.O
1Propulsion Systems Department of the Ukrainian branch of Skyrora Ltd, Edinburgh, UK; Oles Honchar National University of Dnipro, Dnipro, Ukraine
2Oles Honchar National University of Dnipro, Dnipro, Ukraine
Space Sci. & Technol. 2021, 27 ;(5):003-010
https://doi.org/10.15407/knit2021.05.003
Publication Language: English
Abstract: 
Aim. To find and confirm the possibility of hydrogen peroxide tank pressurization using high-temperature pressurization gas (~1100К) with a high percentage of steam (up to 70%) without its losses.
Research methods. Mathematical modeling of pressurization system parameters with the theory of mass transfer and thermodynamic of variable mass bodies have been used.
Results. The conducted research allowed us to find and confirm the possibility of using a new pressurization method with additional sources of heat and elaborate recommendations for its appliance during pressurization time.
Scientific novelty. The main processes have been determined, which prevent implementation of the efficient high-temperature pressurization system of the tank with the hydrogen peroxide using peroxide decomposition products. The main obstacle is the volume condensation of vapor in the free volume of the tank when heat exchange processes with boundary surfaces take place. For the first time, by means of theoretical calculations, the expediency and rationality of using the additional sources of heat such as high-temperature combustion product of solid-fuel gas generator based on sodium azide have been proved. Using of this additional source for the first 30 seconds of engine operation has been proved.
Practical value. Methodology of pressurization system parameters’ calculation was supplemented with discovered thermodynamic relation, which allowed us to calculate the amount of vapor and take some measures to eliminate the condensation. Results of the research allowed the designation of the pressurization system for the highly concentrated hydrogen peroxide tank with a high value of length to diameter relation with its high-temperature decomposition products.      
Keywords: condensation of the vapor, decomposition products, high temperature pressurization gas, high-test peroxide, pressurization system, saturated steam pressure
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