Calculation of minimum supply of fuel in contact with the innertank device to ensure the operation of a liquid-propellant rocket engine in zero gravity
Authors: Sapozhnikov V.B., Polyanskiy A.R., Korolkov A.V.
Published in issue: #3(111)/2021
DOI: 10.18698/2308-6033-2021-3-2063
Category: Aviation and Rocket-Space Engineering | Chapter: Thermal, Electric Jet Engines, and Power Plants of Aircrafts
The paper introduces the results of theoretical studies of the process of liquid fuel deposition in liquid-propellant rocket engine tanks under conditions of free (undisturbed) orbital (suborbital) flight under the influence of a small pre-launch overload created by auxiliary engines before the liquid-propellant sustainer starting. In this work, we estimated the relaxation time of the free volume of liquid for the most unfavorable case, and the minimum supply of the covolume for the guaranteed starting and uninterrupted operation of the liquid-propellant rocket engine in zero gravity. Furthermore, we investigated the possibility of controlling the relaxation time with a gradual or stepwise starting operation. The proposed formula makes it possible at the design stage to assess the minimum supply of fuel, which can be in contact with the innertank device before starting the liquid-propellant sustainer in zero gravity in order to ensure the uninterrupted operation of the propulsion system.
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