Back to Search
Start Over
Investigation of unsteady flow in the unscalloped radial turbine cavity.
- Source :
-
Aerospace Science & Technology . Jun2021, Vol. 113, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- This paper presents an unsteady numerical study of the unsteady flow in the unscalloped radial turbine cavity considering the effect of computational sector size and sealing flow rate. A simplified U-shaped cavity with vanes and blades was simulated and the sealing efficiency was obtained using additional variables method. Unsteady low-pressure structures exist under a certain sealing flow rate, which is similar with axial turbine cavity, while the impact area is much larger. A comparison of computational domains sizes for 60° and 360° shows that whether the sector model can accurately predict the flow field depends highly on the number of low-pressure structures. As the sealing flow rate increases, the number and the speed of low-pressure structures at high radius decrease, and the corresponding low-frequency amplitude increases initially but decreases subsequently. The speed of low-pressure structure is positively correlated with its number, which seems contrary to the phenomenon observed in the axial turbine cavity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RADIAL flow
*TURBINES
*UNSTEADY flow
Subjects
Details
- Language :
- English
- ISSN :
- 12709638
- Volume :
- 113
- Database :
- Academic Search Index
- Journal :
- Aerospace Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 150104042
- Full Text :
- https://doi.org/10.1016/j.ast.2021.106675