Impact of advanced blade configuration on small scale cryogenic axial turbine performance

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Authors

Colleges, School and Institutes

Abstract

Cryogenic Energy Storage (CES) technology which uses liquid air/nitrogen as energy carrier has attracted considerable attention recently due to its high exergy density (762kJ/kg) compared to other energy storage technologies. Liquid air/nitrogen occupies about 1/700 of the volume of its gaseous phase making it easier to store and transport. The stored energy can be recovered through a direct expansion process where the expander design and performance have a major effect on the efficiency of the energy conversion process. In this work the effects of blade configuration including lean (-15° to +15°) and twist (-20° to +30°) angels for rotor and stator of a small scale axial cryogenic turbine have been investigated using ANSYS CFX 3D modelling. Results showed that at rotor lean angle of -10°, twist angle of 0° and hub / tip ratio of 0.83, the improvement in efficiency is 4.28% while for the same angles and hub / tip ratio of 0.66, the efficiency improvement is 1.35%. On the other hand, for rotor lean angle of 0° and twist angle of 30°, the improvement in efficiency for hub / tip ratio of 0.83 is 4.2% and for rotor lean angle of 0° and twist angle of 150, the improvement in efficiency for hub / tip ratio of 0.66 is 2.66%. the improvement was noticed when twist and lean angles for both the rotor and stator were changed simultaneously.

Details

Original languageEnglish
Title of host publication2016 International Conference for Students on Applied Engineering (ICSAE)
EditorsZeyad Yousif Abdoon Al-Shibaany, Atheer F. Hameed
Publication statusPublished - 9 Jan 2017
Event1st International Conference for Students on Applied Engineering, ICSAE 2016 - Newcastle Upon Tyne, United Kingdom
Duration: 20 Oct 201621 Oct 2016

Publication series

NameInternational Conference for Students on Applied Engineering (ICSAE)

Conference

Conference1st International Conference for Students on Applied Engineering, ICSAE 2016
CountryUnited Kingdom
CityNewcastle Upon Tyne
Period20/10/1621/10/16