NDLI: The effect of dense gas dynamics on loss in ORC transonic turbines

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The effect of dense gas dynamics on loss in ORC transonic turbines

Content Provider	Scilit
Author	Galiana, Fj Durá Wheeler, Aps Ong, J. Ventura, Ca De M.
Copyright Year	2017
Description	Journal: Journal of Physics: Conference Series This paper describes a number of recent investigations into the effect of dense gas dynamics on ORC transonic turbine performance. We describe a combination of experimental, analytical and computational studies which are used to determine how, in-particular, trailing-edge loss changes with choice of working fluid. A Ludwieg tube transient wind-tunnel is used to simulate a supersonic base flow which mimics an ORC turbine vane trailing-edge flow. Experimental measurements of wake profiles and trailing-edge base pressure with different working fluids are used to validate high-order CFD simulations. In order to capture the correct mixing in the base region, Large-Eddy Simulations (LES) are performed and verified against the experimental data by comparing the LES with different spatial and temporal resolutions. RANS and Detached-Eddy Simulation (DES) are also compared with experimental data. The effect of different modelling methods and working fluid on mixed-out loss is then determined. Current results point at LES predicting the closest agreement with experimental results, and dense gas effects are consistently predicted to increase loss.
Related Links	http://iopscience.iop.org/article/10.1088/1742-6596/821/1/012021/pdf
ISSN	17426588
e-ISSN	17426596
DOI	10.1088/1742-6596/821/1/012021
Journal	Journal of Physics: Conference Series
Volume Number	821
Language	English
Publisher	IOP Publishing
Publisher Date	2017-03-01
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Conference Series Aerospace Engineering Base Flow Dense Gas Wind Tunnel Transonic Turbine Orc Transonic Trailing Edge Gas Dynamics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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