NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 27 of 29727
Local heat transfer measurement with liquid crystals on rotating surfaces including non-axisymmetric cases
Offline Availability: Go to Request Form
Author and Affiliation:
Metzger, D. E.(Arizona State Univ., Tempe, AZ, United States)
Kim, Y. K.(Arizona State Univ., Tempe, AZ, United States)
Abstract: An overview and summary of test methods and results are given for the problem of measuring local heat transfer on rotating surfaces that model gas turbine engine disks. Disk cavity situations generically similar to those encountered in the high pressure stage disk cooling are considered, with cooling air supplied both at or near the wheel centerline as well as through single or multiple jets impinging outboard on the wheel near the blade attachment region. In some situations provision has been made for ingestion into the disk-cavity from the gas path region radially outboard of the disk. Local heat transfer rates in all cases are determined from the color display from a thin coating of encapsulated liquid crystals sprayed onto the disk, in conjunction with use of a video camera and computer vision system. For cases with axisymmetric disk surfaces, the coated surfaces are illuminated and viewed continuously, and detailed radial distributions of local Nusselt number are obtained. For non-axisymmetric disk surfaces, such as encountered in the vicinity of bolt heads, the disk is illuminated with stroboscopic light, and a method has been developed and used to synchronize the computer frame grabber with the illumination.
Publication Date: Feb 01, 1993
Document ID:
19930020754
(Acquired Dec 28, 1995)
Accession Number: 93N29943
Subject Category: AIRCRAFT PROPULSION AND POWER
Document Type: Conference Paper
Publication Information: AGARD, Heat Transfer and Cooling in Gas Turbines; 11 p
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Arizona State Univ.; Dept. of Mechanical and Aerospace Engineering.; Tempe, AZ, United States
Description: 13p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution within the U.S. granted by agreement
NASA Terms: COOLING; GAS TURBINE ENGINES; HEAT TRANSFER; IMPINGEMENT; LIQUID CRYSTALS; ROTATION; SURFACE TEMPERATURE; TEMPERATURE DISTRIBUTION; BOLTS; COATINGS; HIGH PRESSURE; NUSSELT NUMBER; RADIAL DISTRIBUTION
Imprint And Other Notes: In AGARD, Heat Transfer and Cooling in Gas Turbines 11 p (SEE N93-29926 11-07)
Miscellaneous Notes: Sponsored by NASA. Marshall Space Flight Center and Rockwell International Corp.
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: September 30, 2017
Contact Us