Off-design performance of a single-stage transonic turbine
- Pratt and Whitney Canada, Inc., Longueuil, Quebec (Canada)
This paper presents results of rig testing of a transonic, single-stage turbine at off-design conditions. Mapping of the 3.4 pressure ratio, 1.9 stage loading turbine ranged from 70 through 120% of design speed and 75 to 125% of design pressure ratio. Results show expansion efficiency dropping over 4% from 100 to 80% of design speed at design pressure ratio, while remaining within half a percent from 90 to 110% of design pressure ratio at design speed. Efficiency lapse rate from equivalent sea-level to cruise altitude Reynolds numbers at the design point was measured and found to be worth over 1.5%. Analyses of test results using a viscous three-dimensional solver showed very good agreement for the efficiency change with speed.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 351613
- Report Number(s):
- CONF-980615-; ISSN 0889-504X; TRN: IM9927%%138
- Journal Information:
- Journal of Turbomachinery, Vol. 121, Issue 2; Conference: American Society of Mechanical Engineers (ASME) turbo expo `98 - land, sea, air, Stockholm (Sweden), 2-5 Jun 1998; Other Information: PBD: Apr 1999
- Country of Publication:
- United States
- Language:
- English
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