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DTIC ADA586719: High Order Accuracy Methods for PDEs with Shocks an... |
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by Defense Technical Information Center |
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The aim of this project is the construction of efficient |
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high fidelity schemes for systems of PDEs that contain |
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shock waves. We advocate here the Discontinuous |
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collocation method, i.e. multi-domain spectral method |
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with stable and conservative penalty interface |
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conditions. In this work, the previously developed |
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methodology is generalized to inhomogeneous grid to |
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simulate the two dimensional supersonic injector-cavity |
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system. Non-physical modes generated at the domain |
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interfaces due to the spatial grid inhomogeneity is |
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minimized using the new weighted multi-domain spectral |
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penalty method. The method yields accurate and stable |
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solutions of the injector-cavity system which agree well |
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with experiments qualitatively. Through the direct |
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numerical simulation of the injector-cavity system using |
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the weighted method, the geometric effect of the cavity |
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wall on the pressure fluctuation is investigated. It is |
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shown that the recessed slanted cavity attenuates |
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pressure fluctuations inside cavity enabling the cavity |
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to act potentially as a stable flameholder for scramjet |
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engine. |
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Date Published: 2018-09-15 16:06:09 |
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Identifier: DTIC_ADA586719 |
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Item Size: 8403292 |
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Language: english |
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Media Type: texts |
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DTIC Archive; ; BROWN UNIV PROVIDENCE... |
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