Simulation of Low-Temperature Operation Mode Gas Generator
Keywords:
low-temperature gas generator, mathematical model, numerical methodAbstract
Low-temperature gas generator (LTGG) for producing gas with a temperature of 350 ... 450 K. It consists of two main parts - a combustion chamber with a charge of solid propellant and cooling chamber with granules of the solid coolant. The products of combustion of solid propellant have a high temperature that does not allow to use them in a variety of technical devices. Cooling gas is the result of its interaction with the solid granules cooler on the thermal decomposition of which consumes part of the internal energy of the gas. To describe the processes of heat and mass transfer in LTGG developed a mathematical model based on the one-dimensional equations of continuity, momentum, energy and mass balance of the components of the gas mixture. The gas mixture is composed of products of combustion of solid propellant, degradation products and the air cooler. The mathematical model takes into account the ignition and combustion of the fuel within the gas mixture in LTGG, heat exchange with the structural elements LTGG and kinetics of degradation of pellets cooler. To implement the mathematical model developed numerical method for solving the boundary value problem based on the finite difference method. The system of equations is approximated by implicit difference schemes. For the solution of nonlinear differential equations applied Newton's method. A boundary value problem was solved orthogonal factorization. The calculation results are compared with experimental data. The influence of constructive and regime parameters on the change in temperature, pressure, flow, speed expansion cooler.References
Karpov A.I., Lesthev A.Y., Lipanov A.M., Lesthev G.A. Production of the Fire Extinguishing Mixture by Solid Propellant Propulsion. Journal of less prevention in the process industries, 2013, vol. 26, pp. 338–343. DOI: 10.1016/j.jlp.2011.10.007
Srinivasan R., Raghunandan B.N. Experiments on Thermal Response of Low Aspect Ratio Packed Beds at High Reynolds Numbers with Varying Inflow Temperatures. Experimental thermal and fluid science, 2012, vol. 44, pp. 323–333. DOI:10.1016/j.expthermflusci.2012.07.004
Krishnan S., Rajesh K.K. Experimental Investigation of Erosive Burning of Composite Propellants Under Supersonic Crossflows. International Journal of Energetic Materials and Chemical Propulsion, 2002, vol. 5, iss. 1–6, pp. 316–325. DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.340
Cheng H.G., Zhou J.S., Wang T.B., Dong C.G. The Design and Numerical Simulation Study of Gas Generator Sealing Device. Proceedings of the third international conference on mechanical engineering and mechanics, 2009, vol. 1, 2, рр. 1213–1217.
Yang S., He G.Q., LiuY., Li J. Thurbochaged Solid Propellant Ramjet for actical Missile. Mechanical engineering and materials, 2012, vol. 152–154, pp. 204–209.
Hong M. Experimental Correction of Combustion Gas Properties of AN-based Composite Solid Propellant Used for Turbo-Pump Starter. Aerospace science and technology, 2012, vol. 16, pp. 56–60.
DOI:10.1016/j.ast.2011.03.001
Oserov A., Natan B., Gany A. Analytical Modelling of the Gas Generator Frequency Response in Hybtid Rocket Boosters. ACTA Astronautics, 1886, vol. 39, no. 8, pp. 589–598.
Kim A., Crampton G. Explosion Suppression with Hybrid Gas Generator System. Progress in safety science and technology, 2008, vol. 7, pp. 891–895.
Hong G.C., Murugesan S., Kim S., Beacage G., Choi G., Ahn C.H. A Functional On-Clip Pressure Generator Using Solod Chemical Propellant Lab-on-a-chip. Lab on a Chip, 2003, vol. 3, pp. 281–286.
Engelen K., Lefebvre M.H., De Ruyek J. Chemical Formulation of Solod Propellant for Specific Gas Generators. Twenty-Fourth international pyrotechnics seminar, 1998, pp. 203–216.
Vaulin S.D., Kalinkin A.M., Kovin S.G., Mariash V.I., Simonov E.A., Feofilaktov V.I. Nizkotemperaturnye gazogeneratory na tverdom toplive [Low-Temperature Solid Fuel Gas Generator]. Izshevsk, IAM Science, 2006. 236 p.
Aksionenko D.D., Vaulin S.D., Zezin V.G., Kirillov V.V., Mazitov R.Z., Mariash V.I., Savchenkov V.I., Feofilaktov V.I. Teoreticheskoe i eksperimental’noe issledovanie nizkotemperaturnykh gazogeneratorov [Theoretical and Experimental Study of Low-Temperature Gas Generators]. Izshevsk,
IAM Science, 2008. 264 p.
Lipanov A.M., Bobryshev V.P., Aliev A.V., Spiridonov F.F., Lisitsa V.D. Chislenny experiment v teorii RDTT [Calculation Experiment in the RESF Theory]. Ecaterinburg, IAM Science, 1994. 303 p.
Vukalovich M.P., Rivkin S.L., Aleksandrov A.A. Tablitsy teplofizicheskikh svoystv vody i vodyanogo para [Table of the Water and Water Steam Property]. Moscow, 1969. 408 p.
Kirillov V.V. [Settlement and Theoretical Study of the Processes of Heat and Mass Transfer in Low-Temperature Gas Generators]. Khimicheskaya fizika i mezoskopia [Chemistry physics and mesoscopy], 2008, vol. 10, no. 4, pp. 428–435. (in Russ.)
Samarsky A.A., Nikolaev E.S. Metody resheniya setochnykh uravneny [Calculations Methods for Difference Equations]. Moscow, 1978. 601 p.
