Cranstone, AW and Pullan, G and Curtis, EM and Bather, S (2013) Aerodynamic design of high end wall angle turbine stages- part II: Experimental verification. Journal of Turbomachinery, 136. ISSN 0889-504XFull text not available from this repository.
An experimental investigation of a turbine stage featuring very high end wall angles is presented. The initial turbine design did not achieve a satisfactory performance and the difference between the design predictions and the test results was traced to a large separated region on the rear suction-surface. To improve the agreement between computational fluid dynamics (CFD) and experiment, it was found necessary to modify the turbulence modeling employed. The modified CFD code was then used to redesign the vane, and the changes made are described. When tested, the performance of the redesigned vane was found to have much closer agreement with the predictions than the initial vane. Finally, the flowfield and performance of the redesigned stage are compared to a similar turbine, designed to perform the same duty, which lies in an annulus of moderate end wall angles. A reduction in stage efficiency of at least 2.4% was estimated for the very high end wall angle design. © 2014 by ASME.
|Divisions:||Div A > Turbomachinery|
|Depositing User:||Cron job|
|Date Deposited:||16 Jul 2015 13:45|
|Last Modified:||02 Aug 2015 02:57|