Experimental flow and performance investigations of cavity purge flows in a high pressure turbine stage
2015 (English)In: 11th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2015, European Conference on Turbomachinery (ETC) , 2015Conference paper (Refereed)
A high pressure turbine stage has been investigated from the aspect of flow and performance impact associated with cavity purge. Performance is referred to as the operating parameters of the turbine, mainly based on the continuous output torque monitoring. The flow parameters were studied through measurements featuring temperature and pressure throughout the flow path, as well as in the cavity. Purge and main flow velocities were quantified in the vane exit section, and degree of sealing based on purge-amount correlations and pressure readings. Results were related to turbine efficiency based on a simple correlation, and also entropy generation. Change of operating point was found to have a significant effect on degree of sealing, while the change of efficiency was found to be linear with respect to relative purge rate and independent of operating point.
Place, publisher, year, edition, pages
European Conference on Turbomachinery (ETC) , 2015.
Entropy, Fluid dynamics, Gas turbines, Thermodynamics, Turbomachinery, Entropy generation, High pressure turbine stage, Operating parameters, Operating points, Performance impact, Pressure reading, Temperature and pressures, Turbine efficiency, Turbines
IdentifiersURN: urn:nbn:se:kth:diva-194668ScopusID: 2-s2.0-84983133986OAI: oai:DiVA.org:kth-194668DiVA: diva2:1050740
11th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2015, 23 March 2015 through 27 March 2015
QC 201611302016-11-302016-10-312016-11-30Bibliographically approved