A Separation Control of the Diffuser Flow by the Vortex Generator Jets

Autor:	Tadashi Morioka, Hidetoshi Aoki, Masashi Higashiura, Shinji Honami
Rok vydání:	2004
Předmět:	Physics business.industry Mechanical Engineering Stall (fluid mechanics) Mechanics Forward flow Vortex generator Condensed Matter Physics Active control Physics::Fluid Dynamics Jet velocity Optics Flow sensor business
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 70:2012-2017
ISSN:	1884-8346 0387-5016
DOI:	10.1299/kikaib.70.2012
Popis:	In order to establish the active control system by using the vortex generator jets (VGJs), it is necessary to understand the detailed suppression mechanism of the separated flow in the diffuser. An opening angle of the diffuser can be changed from 8 to 15 deg corresponding to three flow regimes, “Unstalled”, “Appreciable Stall” and “Transitory Stall”. A micro wall flow sensor was used for measurement of forward flow fraction. It is found that VGJ makes the local forward flow fraction increase and prevents the flow detachment. Although the effect of separation control is obtained resulting from the higher jet velocity ratio, excessive jet velocity ratio introduces lower diffuser effectiveness due to the mixing loss.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::81a3a558df5e432d88de41dd470d2f29 https://doi.org/10.1299/kikaib.70.2012 Zobrazit plný text záznamu