NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Comparison of central axis and jet ring coolant supply for turbine disk cooling on a SSME-HPOTP modelThe test facility, test methods and results are presented for an experimental study modeling the cooling of turbine disks in the blade attachment regions with multiple impinging jets, in a configuration simulating the disk cooling method employed on the Space Shuttle Main Engine oxygen turbopump. The study's objective was to provide a comparison of detailed local convection heat transfer rates obtained for a single center-supply of disk coolant with those obtained with the present flight configuration where disk coolant is supplied through an array of 19 jets located near the disk outer radius. Specially constructed disk models were used in a program designed to evaluate possible benefits and identify any possible detrimental effects involved in employing an alternate disk cooling scheme. The study involved the design, construction and testing of two full scale rotating model disks, one plane and smooth for baseline testing and the second contoured to the present flight configuration, together with the corresponding plane and contoured stator disks. Local heat transfer rates are determined from the color display of encapsulated liquid crystals coated on the disk in conjunction with use of a computer vision system. The test program was composed of a wide variety of disk speeds, flowrates, and geometrical configurations, including testing for the effects of disk boltheads and gas ingestion from the gas path region radially outboard of the disk-cavity.
Document ID
19920043089
Document Type
Conference Paper
Authors
Kim, Y. W. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Metzger, D. E. (Arizona State University Tempe, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
SPACECRAFT PROPULSION AND POWER
Report/Patent Number
AIAA PAPER 92-0255
Distribution Limits
Public
Copyright
Other