Flow Development Through An S-Shaped Diffusing Duct

Autor:	Pan He, Dongrun Wu, Junda Feng, Mingmin Zhu, Jinfang Teng
Rok vydání:	2020
Předmět:	020301 aerospace & aeronautics Flow separation Materials science 0203 mechanical engineering 0103 physical sciences Aerospace Engineering Duct (flow) 02 engineering and technology Mechanics 01 natural sciences Energy engineering 010305 fluids & plasmas
Zdroj:	International Journal of Turbo & Jet-Engines. 39:513-523
ISSN:	2191-0332 0334-0082
DOI:	10.1515/tjj-2019-0045
Popis:	This paper focuses on the internal flow development of an S-shaped diffusing duct. Based on the experimental result of total pressure recovery coefficient, the Reynolds stress model (RSM) was selected as a suitable turbulence model for the present study. The numerical results show that 6.2 times the area ratio of the exit to inlet and the aggressive deflection at the first bend of the lower wall lead to strong adverse pressure gradient and very large flow separation, and create a pair of counter-rotating vortices along streamwise direction. The duct diffuser efficiency is 72.37 %. The area-averaged total pressure recovery coefficient at the exit of the duct is 0.9814, and the synthesis distortion index DC (60) is 0.7081.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6329a4dbd868934ca7199c338134bc5d https://doi.org/10.1515/tjj-2019-0045 Zobrazit plný text záznamu