𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Unsteady loss in a high pressure turbine stage

✍ Scribed by S.J. Payne; R.W. Ainsworth; R.J. Miller; R.W. Moss; N.W. Harvey

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
550 KB
Volume
24
Category
Article
ISSN
0142-727X

No coin nor oath required. For personal study only.

✦ Synopsis

An investigation into the unsteady losses in a high pressure turbine stage has been performed experimentally at engine-representative conditions. This has been done by making time-resolved measurements of entropy at stage exit at all vane and rotorrelative positions over a wide range of radial height. Due to the considerable difficulty of obtaining accurate measurements at engine-representative conditions, these measurements provide a unique set of experimental data. Five distinct flow features have been identified and their effects on the stage efficiency estimated, showing good overall agreement with an independent efficiency measurement. Comparisons with a particular numerical prediction of the flow field, Unstrest, have shown very good agreement in both the flow structure and the entropy generation. Only the rotor dependence of the loss mechanisms is examined here: the vane dependence will be presented in a subsequent paper.

πŸ“œ SIMILAR VOLUMES

Prediction of losses in the flow through
Prediction of losses in the flow through the last stage of low-pressure steam turbine
✍ Slawomir Dykas; WΕ‚odzimierz WrΓ³blewski; Henryk Łukowicz πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 355 KB

## Abstract In this paper, the numerical modelling of the flow through the low‐pressure steam turbine last stage was presented. On the basis of predicted wet steam flow‐field, the aerodynamic as well as thermodynamic losses were estimated. For calculations of the wet steam steady flow‐field three n

Surface pressure and heat transfer measu
Surface pressure and heat transfer measurements in a turbine cascade with unsteady oncoming wakes
✍ X. Liu; W. Rodi πŸ“‚ Article πŸ“… 1994 πŸ› Springer 🌐 English βš– 629 KB

Unsteady surface pressure and heat transfer have been measured on a blade of a linear turbine cascade exposed to unsteady oncoming wakes generated by moving cylinders on a squirrel cage device. The Reynolds number and the Strouhal number corresponded to the values in a real turbomachine.