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タイトルOn the inlet vortex system
本文(外部サイト)http://hdl.handle.net/2060/19740027081
著者(英)Braun, G. W.; Bissinger, N. C.
著者所属(英)Tennessee Univ. Space Inst.
発行日1974-09-01
言語eng
内容記述The flow field of a jet engine with an inlet vortex, which can pick up heavy debris from the ground and damage the engine, was simulated in a small water tunnel by means of the hydrogen bubble technique. It was found that the known engine inlet vortex is accompained by a vortex system, consisting of two inlet vortices (the ground based and the trailing one), secondary vortices, and ground vortices. Simulation of the ground effect by an inlet image proved that the inlet vortex feeds on free stream vorticity and can exist without the presence of a ground boundary layer. The structural form of the inlet vortex system was explained by a simple potential flow model, which showed the number, location, and the importance of the stagnation points. A retractable horizontal screen or an up-tilt of the engine is suggested as countermeasure against debris ingestion.
NASA分類PROPULSION SYSTEMS
レポートNO74N35194
NASA-CR-140182
権利No Copyright
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/192534


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