TECHNICAL MECHANICS
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UDC 621.454.2:532.528:629.76.017.2:62-752+533.697:621.51+532.528:518.12

Technical mechanics, 2021, 2, 3 - 19

Solving current problems in engineering system dynamics

DOI: https://doi.org/10.15407/itm2021.02.003

Pylypenko O. V.

Pylypenko O. V.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine

      This paper overviews the main results obtained over the past few years at the Department of Hydromechanical Systems Dynamics and Vibration Protection Systems, Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, in the solution of current problems in the dynamics of liquid-propellant rocket engines (LPREs), liquid-propellant launch vehicle pogo stability, vibration protection system dynamics, the gas dynamics of aircraft gas turbine engine components, and the dynamics of hydraulic systems with cavitating elements. These results are as follows. A mathematical model of LPRE pump dynamics was developed. The model complements a hydrodynamic model of LPRE cavitating pumps by allowing a mathematical simulation of choking regimes. An approach was developed to the construction of a nonlinear mathematical model of LPRE hydraulic line filling. The approach allows one to automatically change, if necessary, the finite element partitioning scheme of a hydraulic line in the process of its filling during LPRE startup calculations. An investigation was conducted into the startup dynamics of a multiengine liquid-propellant propulsion system that consists of four staged-combustion oxidizer-rich LPRDs with account for the possibility of their nonsimultaneous startup. The maximum values of oxidizer and fuel pressure surges and undershoots at the liquid-propellant jet system (LPJS) inlet at an engine spartup and shutdown were determined and used in determining the LPJS operability at the startup and shutdown of the RD861K sustainer engine. The pogo stability of the Cyclone-4M launch vehicle was analyzed analytically using Nyquist’s criterion. A numerical approach was developed to characterizing acoustic oscillations of the combustion products in annular rocket combustion chambers with account for the configuration features of the fire space and the variation of the physical properties of the gaseous medium with the axial length of the chamber. A prototype vibration protection system was developed and made, and its dynamic tests confirmed its high efficiency in damping impact and harmonic disturbances. Approaches were developed to the aerodynamic improvement of aircraft gas turbine engine components. Topical problems in solids grinding in a liquid medium with the use a cavitation pulse technology were solved.
     

liquid-propellant rocket propulsion system, liquid-propellant rocket engine, dynamics, stability, vibration protection system, aerodynamic improvement, gas turbine engine, cavitation pulse technology

1. Pilipenko V. V., Zadontsev V. A., Dovgotko N. I., Grigoriev Yu. E., Manko I. K. Dynamics of liquid-propellant rocket propulsion systems and liquid-propellant launch vehicle pogo stability. Teh. Meh. 2001. No. 2. Pp. 11-37. (in Russian).

2. Dolgopolov S. I. Verification of a hydrodynamic model of a liquid-propellant rocket engine's cavitating pumps using experimental and theoretical pump transfer matrices. Teh. Meh. 2020. No. 3. Pp. 18-29. (in Russian). https://doi.org/10.15407/itm2020.03.018

3. Dolgopolov S. I. Mathematical simulation of choking under self-oscillations in hydraulic systems with cavitating pumps of liquid-propellant rocket engines. Teh. Meh. 2020. No. 4. Pp. 35-42. (in Ukrainian). https://doi.org/10.15407/itm2020.04.035

4. Dolgopolov S. I. Mathematical simulation of hard excitation of cavitation self-oscillations in a liquid-propellant rocket engine feed system.. Teh. Meh. 2021. No. 1. Pp. 29-36. (in Ukrainian). https://doi.org/10.15407/itm2021.01.029

5. Pylypenko O. V., Khoriak N. V., Dolhopolov S. I., Nikolayev O. D. Mathematical simulation of dynamic processes in hydraulic and gas paths at the start of a liquid-propellant rocket engine with generator gas after-burning. Teh. Meh. 2019. No. 4. Pp. 5-20. (in Russian). https://doi.org/10.15407/itm2019.04.005

6 Dolgopolov S. I. Hydrodynamic model of cavitation oscillation for modelling dynamic processes within pump systems at high cavitation number. Teh. Meh. 2017. No. 2. Pp. 12-19. (in Russian). https://doi.org/10.15407/itm2017.02.012

7. Dolgopolov S. I., Nikolaev A. D. Mathematical modelling low-frequency dynamics of flow controller at various amplitudes of harmonic disturbance. Teh. Meh. 2017. No. 1. P. 15-25. (in Russian). https://doi.org/10.15407/itm2017.01.015

8. Pylypenko O. V., Dolhopolov S. I., Nikolayev O. D., Khoriak N. V. Mathematical simulation of the start of a multiengine liquid-propellant rocket propulsion system. Teh. Meh. 2020. No. 1. Pp. 5-18. (in Russian). https://doi.org/10.15407/itm2020.01.005

9. Nikolayev O. D., Bashliy I. D., Sviridenko N. F. , Horiak N. V. Determination of the parameters of motion of the gas-liquid interface in the fuel tanks of launch vehicle space stages in passive portions of the flight. Teh. Meh. 2017. No. 4. Pp. 26-40. (in Russian). https://doi.org/10.15407/itm2017.04.026

10. Pylypenko O. V., Nikolayev O. D,. Bashliy ². D., Dolgopolov S. I. Mathematical modeling of dynamic processes in feeding system of space stage main engine of launch vehicle at active and passive flight. Space Sci. & Technol. 2020. V. 26. No. 1. Pp. 3-17. (in Russian). https://doi.org/10.15407/knit2020.01.003

11. Kook Jin Park, JeongUk Yoo, SiHun Lee, Jaehyun Nam, Hyunji Kim, Juyeon Lee, Tae-Seong Roh, Jack J. Yoh, Chongam Kim, SangJoon Shin. Pogo accumulator optimization based on multiphysics of liquid rockets and neural networks. Journal of Spacecraft and Rockets. 2020. V. 57. No. 4. Pp. 809-822. https://doi.org/10.2514/1.A34769

12. Pylypenko O. V., Degtyarev M. A., Nikolayev O. D., Klimenko D. V., Dolgopolov S. I., Khoriak N. V., Bashliy I. D., Silkin L. A. Providing of POGO stability of the Cyclone-4M launch vehicle. Space Sci. & Technol. 2020. V. 26. No. 4. Pp. 3-20. https://doi.org/10.15407/knit2020.04.003

13. Pilipenko V. V., Dolgopolov S. I. Experiment-and-calculation determination of the coefficients of the equation of cavity dynamics in inducer-equipped centrifugal pumps of different standard sizes. Teh. Meh. 1998. No. 8. Pp. 50-56. (in Russian). https://doi.org/10.1016/S0262-1762(99)80457-X

14. Khoriak N. V., Dolhopolov S. I. Features of mathematical simulation of gas path dynamics in the problem of the stability of low-frequency processes in liquid-propellant rocket engines. Teh. Meh. 2017. No. 3. Pp. 30-44. (in Russian). https://doi.org/10.15407/itm2017.03.030

15. Nikolayev O. D., Bashliy I. D., Khoryak N. V. Computation of the POGO self-oscillation parameters in the dynamic "propulsion - rocket structure" system by using a 3D structural model. Teh. Meh. 2018. No. 2. Pp. 17-29. https://doi.org/10.15407/itm2018.02.017

16. Pylypenko O. V., Nikolayev O. D., Bashliy I. D., Khoriak N. V., Dolgopolov S. I. State of the art in the theoretical study of the high-frequency stability of working processes in liquid-propellant rocket combustion chambers. Teh. Meh. 2020. No. 2. Pp. 5-21. (in Ukrainian). https://doi.org/10.15407/itm2020.02.005

17. Nikolayev O. D., Bashliy I. D., Khoriak N. V., Dolgopolov S. I. Evaluation of the high-frequency oscillation parameters of a liquid-propellant rocket engine with an annular combustion chamber. Teh. Meh. 2021. No 1. Pp. 16-28. https://doi.org/10.15407/itm2021.01.016

18. Pylypenko M. V. System for space hardware vibration protection in transportation. Teh. Meh. 2020. No. 1. Pp. 120-130. (in Russian). https://doi.org/10.15407/itm2020.01.120

19. Kvasha Yu. A., Zinevych N. A. On objective function interpolation in the optimization of engineering systems. Teh. Meh. 2018. No. 2. Pp. 71-29. (in Russian). https://doi.org/10.15407/itm2018.02.071

20. Kvasha Yu. A., Zinevych N. A., Petrushenko N. V. Aerodynamic improvement of centrifugal compressor stage inlet guide vanes. Teh. Meh. 2019. No. 3. Pp. 38-44. (in Russian). https://doi.org/10.15407/itm2019.03.038

21. Kvasha Yu. A., Zinevych N. A. Aerodynamic improvement of centrifugal compressor stage impellers. Teh. Meh. 2019. No. 1. Pp. 57-67. (in Russian). https://doi.org/10.15407/itm2019.01.053

22. Kvasha Yu. A., Zinevych N. A. On the effect of the meridional contour shape on the power characteristics of a centrifugal compressor wheel. Teh. Meh. 2020. No. 3. Pp. 12-17. (in Ukrainian). https://doi.org/10.15407/itm2020.03.012

23. Kvasha Yu. A. Calculation of a 3D turbulent flow in aircraft gas turbine engine ducts. Teh. Meh. 2020. No. 4. Pp. 65-71. (in Ukrainian). https://doi.org/10.15407/itm2020.04.065

24. Osadchyi O. V., Usenko O. L., Pylypenko M. V., Popov A. I. Graduation of a solid material ground by a cavitation pulse technology. Teh. Meh. 2020. No. 2. Pp. 123-136. (in Ukrainian) https://doi.org/10.15407/itm2020.02.123

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