Three-dimensional Numerical Modeling of Continuous Spin Detonation of a Synthesis Gas-Air Mixture in an Annular Combustor
E. V. Simonov, A. I. Rybnikov, A. M. Gurin, A. V. Trilis, A. N. Samsonov
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: continuous spin detonation, annular combustor, transverse detonation waves, synthesis gas---air mixture, flow structure, mathematical modeling
Abstract
A closed mathematical model of continuous spin detonation of a synthesis gas---air mixture is formulated in a three-dimensional unsteady gas-dynamic formulation, and an algorithm for numerically solving the problem is developed. The model is verified using experimental data on ignition delay at high temperatures and the results of one-dimensional numerical calculations of the Chapman---Jouguet detonation parameters. For three stoichiometric compositions in an annular cylindrical combustor 306 mm in diameter, single-wave continuous spin detonation modes are obtained and the three-dimensional structure and the main flow parameters are analyzed. The minimum possible flow rates for continuous detonation are obtained in the case of variable specific mixture flow rates in a range of 90 ÷ 260 kg/(s · m2). The resulting data are compared with existing experimental data.
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