Fluidic Control Method for Improving the Self-Starting Ability of Hypersonic Inlets
| Autor: | Zhao Hao, Wang Jianyong, Teng Yulin, Lv-Rong Xie, Guang-Fu Ma |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
Hypersonic speed Aerospace Engineering 02 engineering and technology 01 natural sciences 010305 fluids & plasmas symbols.namesake Flow separation 0203 mechanical engineering Control theory 0103 physical sciences Duct (flow) Backflow 020301 aerospace & aeronautics geography geography.geographical_feature_category business.industry Mechanical Engineering Mechanics Unstart Inlet Fuel Technology Mach number Space and Planetary Science cardiovascular system symbols Oblique shock business |
| Zdroj: | Journal of Propulsion and Power. 32:153-160 |
| ISSN: | 1533-3876 0748-4658 |
| DOI: | 10.2514/1.b35749 |
| Popis: | The poor self-starting ability at low Mach number normally restricts the proper operation of hypersonic inlets within a wide Mach-number range. A fluidic control method with backflow duct based on the flowfield characteristics of the unstart flows is brought forward and investigated through a combination of computational and experimental methods. First, the uncontrolled case is studied. Results show that the baseline inlet does not start until Mach 6.1, which is too high for the researched hypersonic inlet. Then, the controlled case demonstrates that the flow separation is well controlled by means of the closed flow cycle introduced by the backflow duct. Numerical investigations indicate that the self-starting Mach number of the backflow-duct inlet declines to Mach 4.3, and starting status at Mach 5.0 and α=4 deg is observed experimentally. The self-starting ability of the inlet is improved remarkably; meanwhile, at high Mach numbers, the flow structure is barely impacted by the minimal backflow rate, en... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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