Papers by Ildar Akhmedyanov
Progress in Propulsion Physics. EUCASS advances in aerospace sciences book series. V. 8. / [Edited by M. Calabro, L. DeLuca, S. Frolov, L. Galfetti, O. Haidn]. – Moscow: Torus Press, 2016. – P. 389 – 406., 2016
The paper concerns two problems connected with the idea of gaseous detonation initiation via flow... more The paper concerns two problems connected with the idea of gaseous detonation initiation via flow cumulation effects and convergence of relatively weak shock waves (SW). The first one is the three-dimensional (3D) numerical investigation of shock-to-detonation transition (SDT) in methane-air mixture in a tube with parabolic contraction followed by the tube section of narrow diameter and conical expansion. The second problem is the numerical study of the startup of the model small-scale hydrogen electrochemical pulse detonation engine with the use of electrical discharge generating the toroidal SW. The investigation is performed by means of numerical simulation with the use of modern high-performance computing systems.
Science and Technology of Energetic Materials. – 2011. – Vol. 72, No. 4. – P. 116 – 122., 2011
The mathematical model, the numerical method and the parallelization technique are presented for ... more The mathematical model, the numerical method and the parallelization technique are presented for the problems of detonation initiation by means of comparatively weak shock wave and propagation of detonation waves in threedimensional tubes of complex shapes. The mechanisms of detonation initiation in a tube with parabolic contraction and cone expansion and in a helical tube are analyzed. The results obtained are of interest both for basic research contributing to understanding of the mechanism of detonation initiation in tubes with curved walls and for applications from point of view of predictive modeling of accidents in chemical industry.
Doklady Physics. – 2010. – Vol. 55, No. 3. – P. 150 – 154., 2010
On the basis of results of two and three dimen sional numerical simulation, we proposed for the f... more On the basis of results of two and three dimen sional numerical simulation, we proposed for the first time to use the profiling of axisymmetric tube walls in the shape of parabolic contraction and conic expan sion for initiating the detonation by means of a rela tively weak shock wave. The detonation initiation mechanism is revealed, and its basic stages are ana lyzed. For simulating the propane-air mixture, we found the parabolic contraction shape and selected the conic expansion parameters providing the initia tion of detonation for the Mach number of an original shock wave equal to 2.65.
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Papers by Ildar Akhmedyanov