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

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Journal of Engineering for Gas Turbines and Power

DOI:https://doi.org/10.1115/1.2816689· OSTI ID:372193

Morrison, G L; Winslow, R B; Thames, III, H D ^[1]

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1. Texas A and M Univ., College Station, TX (United States). Turbomachinery Lab.

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.

• Sponsoring Organization: USDOE
• OSTI ID: 372193
• Report Number(s): CONF-950629--
• Journal Information: Journal of Engineering for Gas Turbines and Power, Journal Name: Journal of Engineering for Gas Turbines and Power Journal Issue: 3 Vol. 118; ISSN JETPEZ; ISSN 0742-4795
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AIRTIGHTNESS
ANNULAR SPACE
LEAK TESTING
SEALS
TURBOMACHINERY