Development of the Porous-Slot Geometry of the NWTC Test Section.
Abstract
The development of the concept features of the wall configuration of the National Wind Tunnel Complex project is described in the context of the project history. Flow quality requirements concerning stream angle homogeneity at the outer edge of the test volume, requirements for maximum wall interference, optical access, and test volume acoustic considerations in addition to Mach number range and tunnel operational mode were factors in the design. The development process included 2D calculations for stream angle homogeneity to establish slot width and spacing, 3D calculations for verification of slot geometry and crossflow control, and experimental development of slot-baffle insert geometry that would be rugged, allow control of crossflow, and not produce strong resonant tones. results of 2D calculations, 3D calculations to illustrate need for control of crossflow, and experimental evaluation of baseline slot baffle acoustic properties are presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1997
- Accession Number
- ADA345793
Entities
People
- Frank W. Steinle Jr.
Organizations
- Arnold Engineering Development Complex