Special Features of Calculating the Composition and Temperature of Combustion Products of Superrich Oxygen-Methane Fuel

Special features of combustion of superrich oxygen-methane fuels in gas generators of liquid propellant rocket engines (LPRE) are analyzed. The benefits of two-zone representation of the combined working process are justified. Thermodynamic calculations of the equilibrium and frozen combustion products of methane in oxygen are performed using the Terra software package. The conditions of occurrence of chemical non-equilibrium are considered with regard to the LPRE gas generator. They include experimentally determined absence of condensed carbon (soot), whose possibility of formation follows from the equilibrium approximation calculation. The methodology of the non-equilibrium modelling through thermodynamic calculations using instructional commands of the Terra software package is proposed. Examples of setting the initial data for calculations, and the results of mathematical simulation are given.

References

[1] Tekhnicheskie usloviia TU 021 00480689–96 Gaz goriuchii prirodnyi szhizhennyi. Toplivo dlia raketnoi tekhniki [Specifications TU 021 00480689-96 liquefied natural gas fuel. Fuel for rocketry]. St. Petersburg, GIPKh publ., 1996. 15 p.

[2] Klepikov I.A., Bukanov V.T., Miroshkin V.V., Prishchepa V.I., Romasenko T.Ia. ZhRD na metanovom goriuchem. Istoriia, sostoianie i perspektiva [LRE to methane fuel. History, status and prospect]. Sbornik trudov NPO Energomash [Proceedings NPO Energomash]. 2000, no. 18, pp. 192–204.

[3] Leontyev N.I., Kolkin Ye.N., Zavyalov V.S. KB Khimmash Lox/LNG development status. 48th Intern. Aerospace Congress, Berlin, 2000, pp. 23–28.

[4] Belov G.V., Trusov B.G. Programmnye kompleksy dlia termodinamicheskogo modelirovaniia ravnovesnykh sostoianii produktov sgoraniia topliv [Software for simulation of thermodynamic equilibrium states of combustion fuels]. Raketno-kosmicheskie dvigatel’nye ustanovki. Sbornik materialov Vserossiiskoi nauchno-tekhnicheskoi konferentsii [Rocket and space propulsion systems. Collected materials of All-Russian Scientific and Technical Conference]. Moscow, OOO «Diona» publ., 2010, pp. 21–22.

[5] Trusov B.G. Program System Terra For Simulation Phase and Chemical Equilibrium. Proc. of the 14 Intern. Symp. on Chemical Thermodynamics, St-Petersburg, 2002, pp. 483–484.

[6] Termodinamicheskie i teplofizicheskie svoistva produktov sgoraniia [Thermodynamic and transport properties of combustion products]. Ed. Glushko V.P. Moscow, VINITI AN SSSR publ., 1971–1979. Vol. 3, 1973. 637 p.

[7] Baza dannykh Termicheskie Konstanty Veshchestv [Database Thermal Constants of Substances]. Available at: http://www.chem.msu.ru/cgi-bin/tkv.pl?show=welcome.html/welcome.html (accessed 21 September 2014).

[8] Zimogliad V.M., Khudiakov V.N. K voprosu o sazheobrazovanii i vybrose sazhi v protsesse ognevykh ispytanii ZhRD na stendakh otkrytogo tipa [On the question of soot formation and soot emissions in the process of firing tests LRE stands for open-ended]. Trudy NPO Energomash [Proceedings of NPO Energomash]. 2001, no. 19, pp. 251–264.

[9] Beliaev N.M. Sistemy nadduva toplivnykh bakov raket [Pressurization system fuel tank missiles]. Moscow, Mashinostroenie publ., 1976. 336 p.

[10] Bakirov F.G., Zakharov V.M., Polishchuk I.Z., Shaikhutdinov Z.G. Obrazovanie i vygoranie sazhi pri szhiganii uglevodorodnykh topliv [Education and burning soot from combustion of hydrocarbon fuels]. Moscow, Mashinostroenie publ., 1989. 128 p.

[11] Lapshin M.P. Razrabotka novykh tekhnologicheskikh reshenii pri poluchenii pechnogo tekhugleroda. Diss. kand. tekh. nauk [The development of new technological solutions in the preparation of the furnace carbon black. Cand. tech. sci. diss.]. Moscow, 2007. 120 p.

[12] Belov G.V. Termodinamicheskoe modelirovanie: metody, algoritmy, programmy [Thermodynamic modeling: methods, algorithms, programs]. Moscow, Nauchnyi mir publ., 2002. 184 p.