A statistical approach to the experimental evaluation of transonic turbine airfoils in a linear cascade

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Journal of Turbomachinery; (United States)

DOI:https://doi.org/10.1115/1.2929263· OSTI ID:6102149

Shelton, M L; Gregory, B A ^[1]; Doughty, R L; Kiss, T; Moses, H L ^[2]

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1. Turbine Aero and Cooling Technology, General Electric Aircraft Engines, Cincinnati, OH (United States)
2. Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Mechanical Engineering Dept.

In aircraft engine design (and in other applications), small improvements in turbine efficiency may be significant. Since analytical tools for predicting transonic turbine losses are still being developed, experimental efforts are required to evaluate various designs, calibrate design methods, and validate CFD analysis tools. However, these experimental efforts must be very accurate to measure the performance differences to the levels required by the highly competitive aircraft engine market. Due to the sensitivity of transonic and supersonic flow fields, it is often difficult to obtain the desired level of accuracy. In this paper, a statistical approach is applied to the experimental evaluation of transonic turbine airfoils in the VPI and SU transonic cascade facility in order to quantify the differences between three different transonic turbine airfoils. This study determines whether the measured performance differences between the three different airfoils are statistically significant. This study also assesses the degree of confidence in the transonic cascade testing process at VPI and SU.

• OSTI ID: 6102149
• Journal Information: Journal of Turbomachinery; (United States), Journal Name: Journal of Turbomachinery; (United States) Vol. 115:3; ISSN JOTUEI; ISSN 0889-504X
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
AIRFOILS
ENGINES
FLUID FLOW
GAS TURBINE ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MATHEMATICS
PERFORMANCE TESTING
STATISTICS
TESTING
TRANSONIC FLOW
TURBINE BLADES