Structural features of the detonation flow
| Autor: | Oleksandr Aksonov, Oleksandr Zolotko |
|---|---|
| Jazyk: | English<br />Ukrainian |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Авіаційно-космічна техніка та технологія, Vol 0, Iss 3, Pp 42-49 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1727-7337 2663-2217 |
| DOI: | 10.32620/aktt.2023.3.05 |
| Popis: | The subject of this research is the processes that occur during the formation and propagation of a detonation wave in a flat channel. The goal of this work is to study the features of the complex multiform structure of the detonation wave and its influence on the integral parameters of the detonation flow. The task of the research was to identify regularities during the formation process and propagation of the detonation wavefront, establish the nature of the influence of the detonation front structure on the processes that occur in the zone of stable flow parameters, and analyze the gas-dynamic parameters of the flow at the final stage of the process - at the stage of propagation of rarefaction waves. The main research method is mathematical simulation using CFD technologies (ANSYS Fluent package). The main results of the study: it was established that the values of gas-dynamic parameters at the triple points of shock waves are significantly greater than the corresponding values at the Neumann peak, and in the areas between the triple points are significantly smaller; the values of the parameters averaged over the cross-section of the detonation wave front almost do not differ from the values of the parameters at the Neumann peak; the propagation velocity of the detonation wave averaged over the cross-section of the flow also corresponds to the calculated velocity according to the Chapman-Jouguet model; outside the zone of chemical reaction, the formation of triple configurations is impossible, therefore the speed of the detonation wave front will be lower than the values of Chapman-Jouguet, which will affect the further processes of propagation of the detonation; the processes of formation and propagation of the detonation wave front in a certain way influence the distribution of steady flow parameters, while the wave processes spread to the Taylor zone, which leads to significant turbulence of the wall layer; due to the turbulence of the wall layer, the intensity of convective heat fluxes into the channel wall increases. Conclusion: the obtained results are in good agreement with the results of known experimental studies and can be used in the calculation of the integral impulse characteristics of the detonation engine chamber and in the design of its cooling system. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|