Study of characteristics of the launch vehicle fuel line gas damper

Abstract


Ensuring the longitudinal stability and quality of regulation of a liquid-propellant launch vehicle is very important in its development and operation. It is known that the use of gas dampers installed in the feed line is one of the effective ways to provide longitudinal stability of a launch vehicle. Correct choice of damper characteristics makes it possible to eliminate the possibility of coinciding of the natural frequencies of oscillations of pressure of the liquid in the feed line and in the launch vehicle body and thus to ensure the longitudinal stability. Methods of mathematical and numerical simulation are applied for the analysis of gas damper characteristics using the software package MatLab/Simulink and AMESim. The paper presents a mathematical model of the gas damper, its transient and frequency responses are analyzed. The acoustic conductance of the gas damper is calculated as its generalized dynamic characteristics. Variations of volume are plotted as a function of liquid pressure at the damper inlet in case of harmonic oscillations. The developed model of the gas damper can be used in analyzing the frequency response of the fuel feed line in the framework of solving the problem of ensuring the longitudinal stability of a launch vehicle.


About the authors

A. G. Gimadiev

Samara State Aerospace University

Author for correspondence.
Email: gimadiev_ag@mail.ru

Russian Federation

Doctor of Science (Engineering)

Professor of the Department of Power Plant Automatic Systems

D. A. Odinokov

Joint-Stock Company Space Rocket Center «Progress», Samara

Email: _deo_@rambler.ru

Russian Federation

Design engineer

D. M. Stadnik

Samara State Aerospace University

Email: sdm-63@bk.ru

Russian Federation

Junior research associate

P. I. Greshnyakov

Samara State Aerospace University

Email: pavel.ssau@gmail.com

Russian Federation

Postgraduate student

References

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