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Title: Phase-averaged wall shear stress, wall pressure, and near-wall velocity field measurements in a whirling annular seal

The flow field inside a 50 percent eccentric whirling annular seal operating at a Reynolds number of 24,000 and a Taylor number of 6600 has been measured using a three-dimensional laser-Doppler anemometer system. Flush mount pressure and wall shear stress probes have been used to measure the stresses (normal and shear) along the length of the stator. The rotor was mounted eccentrically on the shaft so that the rotor orbit was circular and rotated at the same speed as the shaft (a whirl ratio of 1.0). This paper presents mean pressure, mean wall shear stress magnitude, and mean wall shear stress direction distributions along the length of the seal. Phase-averaged wall pressure and wall shear stress are presented along with phase-averaged mean velocity and turbulence kinetic energy distributions located 0.16c from the stator wall, where c is the seal clearance. The relationships between the velocity, turbulence, wall pressure, and wall shear stress are very complex and do not follow simple bulk flow predictions.
Authors:
; ;  [1]
  1. Texas A and M Univ., College Station, TX (United States). Turbomachinery Lab.
Publication Date:
OSTI Identifier:
372193
Report Number(s):
CONF-950629--
Journal ID: JETPEZ; ISSN 0742-4795; TRN: IM9641%%270
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Engineering for Gas Turbines and Power; Journal Volume: 118; Journal Issue: 3; Conference: 40. International gas turbine and aeroengine congress and exposition, Houston, TX (United States), 5-8 Jun 1995; Other Information: PBD: Jul 1996
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; SEALS; AIRTIGHTNESS; ANNULAR SPACE; TURBOMACHINERY; LEAK TESTING