Continued Investigation of Leakage and Power Loss Test Results for Competing Turbine Engine Seals
Abstract
Secondary seal leakage in jet engine applications results in power losses to the engine cycle. Likewise, seal power loss injet engines not only result in efficiency loss but also increase the heat input into the engine resulting in reduced componentlives. Experimental work on labyrinth and annular seals was performed at NASA Glenn Research Center to quantify sealleakage and power loss at various temperatures, seal pressure differentials, and surface speeds. Data from annular andlabyrinth seals are compared with previous brush and finger seal test results. Data are also compared to literature. Annularand labyrinth seal leakage rates are 2 to 3 times greater than brush and finger seal rates. Seal leakage decreases withincreasing speed but increases with increasing test temperature due to thermal expansion mismatch. Also seal power lossincreases with surface speed, seal pressure differential, mass flow rate, and radial clearance. Annular and labyrinth sealpower losses were higher than those of brush or finger seal data. The brush seal power loss was 15 to 30 percent lowerthan annular and labyrinth seal power loss.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2006
- Accession Number
- AD1043275
Entities
People
- Irebert R. Delgado
- Margaret P. Proctor
Organizations
- National Aeronautics and Space Administration