Vortex-generating coolant-flow-passage design for increased film-cooling effectiveness and surface coverage
- Papell, S. S.
- Nov 1, 1984.
- Physical Description:
- 1 electronic document
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
- The thermal film-cooling footprints observed by infrared imagery for three coolant-passage configurations embedded in adiabatic-test plates are discussed. The configurations included a standard round-hole cross section and two orientations of a vortex-generating flow passage. Both orientations showed up to factors of four increases in both film-cooling effectiveness and surface coverage over that obtained with the round coolant passage. The crossflow data covered a range of tunnel velocities from 15.5 to 45 m/sec with blowing rates from 0.20 to 2.05. A photographic streakline flow visualization technique supported the concept of the counterrotating apability of the flow passage design and gave visual credence to its role in inhibiting flow separation.
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19850004006., Accession ID: 85N12314., E-2147., NAS 1.60:2388., and NASA-TP-2388.
- No Copyright.
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