ТЕПЛООБМІН ПРИ ТЕЧІЇ РЕАЛЬНОГО ГАЗУ У ПРИКОРДОННОМУ ШАРІ ЗА УДАРНОЮ ХВИЛЕЮ
A mathematical model of nonideal gas flow in a boundary layer behind a shock wave is presented, taking slip effects into account. The model takes into account the effect of shock wave intensity (U¥/Us), physical (Pr) and thermodynamic (Waa, Wab) gas properties, slip effects (Kn) and surface temperat...
Збережено в:
| Дата: | 2023 |
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| Автори: | , , , |
| Формат: | Стаття |
| Мова: | Ukrainian |
| Опубліковано: |
Institute of Engineering Thermophysics of NAS of Ukraine
2023
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| Онлайн доступ: | https://ihe.nas.gov.ua/index.php/journal/article/view/553 |
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| Назва журналу: | Thermophysics and Thermal Power Engineering |
Репозитарії
Thermophysics and Thermal Power Engineering| Резюме: | A mathematical model of nonideal gas flow in a boundary layer behind a shock wave is presented, taking slip effects into account. The model takes into account the effect of shock wave intensity (U¥/Us), physical (Pr) and thermodynamic (Waa, Wab) gas properties, slip effects (Kn) and surface temperature (T0/Tw). The results of calculations of the heat transfer coefficients (Nusselt number) depending on the Knudsen number and van der Waals parameters are presented.
It is shown that slip effects lead to a decrease in the intensity of transfer processes on the wall due to the weakening of the interaction between the flow and the surface. The slip effect weakens with increasing value of the Waa parameter, which is explained by the additional pressure. This eliminates the effect of slippage, enhancing the interaction between the flow and the surface. On the contrary, an increase in the value of the Wab parameter enhances the effect of slippage due to additional volume. |
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