VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University638210.18287/2541-7533-2018-17-4-81-92UnknownProposals for improving the efficiency and service life of the turbines of turbo-pump assemblies in liquid-propellant rocket engines by using double-sided crest-type radial labyrinth sealsLevochkinP. S.<p><span lang="EN-US">Candidate of Science (Engineering)<br />Deputy General Director – Chief Designer</span></p>energo@npoem.ruChvanovV. K.<p><span lang="EN-US">Doctor of Science (Engineering), Professor<br />Adviser to the General Director</span></p>energo@npoem.ruVasilievV. S.<p><span lang="EN-US">Design Engineer of the Turbines Sector</span></p>vasilev_vs@npoem.ruTimushevS. F.<p><span lang="EN-US">Doctor of Science (Engineering), Professor</span></p>irico@mai.ruNPO Energomash named after academician V. GlushkoMoscow Aviation Institute (National Research University)2012201817481922012201820122018Copyright © 2018, VESTNIK of Samara University. Aerospace and Mechanical Engineering2018<p><span lang="EN-US">Nowadays the improvement of the design of liquid-propellant rocket engines (LPREs) depends on a variety of factors and activities, among which we can distinguish, for example, the improvement of energy characteristics of units and assemblies forming part of the LPREs. The article compares the operation of LPRE turbo-pump turbines using double-sided and single-sided labyrinth seals used in Energomash's engines. The key geometrical parameters of each seal variant, images of 3D-models of seals constructed for the calculations, the resulting computational grid for each seal variant, as well as graphs of the pressure distribution and velocity fields are presented for visual comparison. Sectoral leakage was calculated for each variant of the seal, the possibility of reducing the temperature of the turbine inlet working gas was assessed. In the future attention should be paid to a more detailed study of this type of seals with the use of modern computing power</span></p>Жидкостный ракетный двигательтурбонасосный агрегаттурбинауплотнениезазорутечкаэффективностьресурсLiquid-propellant rocket engineturbo-pump assemblygapsealturbineleakefficiencyservice life[1. Kirillov I.I. Teoriya turbomashin [Theory of turbo-machines]. L.: Mashinostroenie Publ., 1972. 533 p.][2. Levochkin P.S., Chvanov V.K., Romasenko E.N., Sidorenko A.S., Kanalin Yu.I. Problemy razrabotki agregatov TNA i busternykh nasosov sovremennykh ZhRD [Problems in the development of turbine pump assemblies and booster pumps for modern liquid-propellant rocket engines]. Moscow: NPO Energomash Publ., 2017.][3. Belyaev E.N., Chvanov V.K., Chervakov V.V. Matematicheskoe modelirovanie rabochego protsessa ZhRD [Mathematical modeling of the working process of a liquid-propellant rocket engine]. Moscow: Moscow Aviation Institute Publ., 1999. 228 p.][4. Kanalin Yu.I., Chernysheva I.A. Operational characteristics of turbo-pump assembly turbines in accordance with requirements for operating as part of a liquid-propellant rocket engine. Proceedings of NPO Energomash. 2015. No. 32. P. 237-262. (In Russ.)][5. Skibin S.A., Sternin L.E., Chernysheva I.A., Kanalin Yu.I., Poletaev N.P., Kazennov I.S. Optimization of turbine labyrinth seal design on the basis of a model of three-dimensional flow. NTO no. 769-92-2013.][6. Kesaev Kh.V., Trofimov R.S. Nadezhnost' dvigateley letatel'nykh apparatov [Reliability of aircraft engines]. Moscow: Mashinostroenie Publ., 1982. 136 p.][7. Ovsyannikov B.V., Borovskiy B.I. Teoriya i raschet agregatov pitaniya zhidkostnykh raketnykh dvigateley [Theory and calculation of power units for liquid rocket engines]. Moscow: Mashinostroenie Publ., 1986. 376 p.][8. Timushev S.F., Klimenko D.V., Firsov V.P., Antyukhov I.V. Numerical modeling of pressure pulsations in the turbo expender of perspective cryostatting system. Trudy MAI. 2015. No. 82. (In Russ.). Available at: <a href='http://www.trudymai.ru/upload/iblock/4e3/timushev_klimenko_firsov_antyukhov_rus.pdf?lang=en&issue=82'>http://www.trudymai.ru/upload/iblock/4e3/timushev_klimenko_firsov_antyukhov_rus.pdf?lang=en&issue=82</a>]