Dynamic Drag Reduction Effects of Aerospikes and Aerodisks
In order to investigate the dynamic characteristics of blunt aircraft mounted with aerospikes and aerodisks in large-amplitude force-pitching, the Roe spatial scheme and the lower-upper symmetric Gauss-Seidel (LU-SGS) method with dual time step are employed for discretization of unsteady Navier-Stok...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/9370331 |
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| _version_ | 1832545969375281152 |
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| author | Rong Han Wei Liu Xiaoliang Yang Xinghua Chang |
| author_facet | Rong Han Wei Liu Xiaoliang Yang Xinghua Chang |
| author_sort | Rong Han |
| collection | DOAJ |
| description | In order to investigate the dynamic characteristics of blunt aircraft mounted with aerospikes and aerodisks in large-amplitude force-pitching, the Roe spatial scheme and the lower-upper symmetric Gauss-Seidel (LU-SGS) method with dual time step are employed for discretization of unsteady Navier-Stokes (N-S) equations. A parametric investigation on the flow fields is conducted by altering the pitching period, aerospike length, and aerodisk diameter consequently via a variable-controlling procedure. Dynamic characteristics of aerodynamic drag as well as the visualization of unsteady flow fields are achieved, and the results show that the aerodynamics of hypersonic aircraft under the condition of large-amplitude force-pitching vibration have hysteresis characteristics affected by periods of force-pitching vibration. In addition, when changing aerospike length and aerodisk diameter, the variation tendency of drag reduction efficiency is determined by the pitching angle of the oscillation process. |
| format | Article |
| id | doaj-art-14373a13efa546dfb7bd591a882ff437 |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-14373a13efa546dfb7bd591a882ff4372025-02-03T07:24:12ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742021-01-01202110.1155/2021/93703319370331Dynamic Drag Reduction Effects of Aerospikes and AerodisksRong Han0Wei Liu1Xiaoliang Yang2Xinghua Chang3College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, ChinaUnmanned Systems Research Center, National Innovation Institute of Defense Technology, Beijing 100071, ChinaIn order to investigate the dynamic characteristics of blunt aircraft mounted with aerospikes and aerodisks in large-amplitude force-pitching, the Roe spatial scheme and the lower-upper symmetric Gauss-Seidel (LU-SGS) method with dual time step are employed for discretization of unsteady Navier-Stokes (N-S) equations. A parametric investigation on the flow fields is conducted by altering the pitching period, aerospike length, and aerodisk diameter consequently via a variable-controlling procedure. Dynamic characteristics of aerodynamic drag as well as the visualization of unsteady flow fields are achieved, and the results show that the aerodynamics of hypersonic aircraft under the condition of large-amplitude force-pitching vibration have hysteresis characteristics affected by periods of force-pitching vibration. In addition, when changing aerospike length and aerodisk diameter, the variation tendency of drag reduction efficiency is determined by the pitching angle of the oscillation process.http://dx.doi.org/10.1155/2021/9370331 |
| spellingShingle | Rong Han Wei Liu Xiaoliang Yang Xinghua Chang Dynamic Drag Reduction Effects of Aerospikes and Aerodisks International Journal of Aerospace Engineering |
| title | Dynamic Drag Reduction Effects of Aerospikes and Aerodisks |
| title_full | Dynamic Drag Reduction Effects of Aerospikes and Aerodisks |
| title_fullStr | Dynamic Drag Reduction Effects of Aerospikes and Aerodisks |
| title_full_unstemmed | Dynamic Drag Reduction Effects of Aerospikes and Aerodisks |
| title_short | Dynamic Drag Reduction Effects of Aerospikes and Aerodisks |
| title_sort | dynamic drag reduction effects of aerospikes and aerodisks |
| url | http://dx.doi.org/10.1155/2021/9370331 |
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