High Velocity Jet Noise Source Location and Reduction. Task 1. Activation of Facilities and Validation of Source Location Techniques,
Abstract
This report summarizes the results of Task 1 as conducted under the subject program. The intent of this 29-month effort was to check out candidate test facilities and noise source location techniques to ensure that the best possible jet noise data over the full range of conditions (velocities ranging from 600 fps to 3000 fps with the best instrumentations are obtained. The facilities activated and validated included: two anechoic facilities; the University of Southern California in Los Angeles, California, and the University of British Columbia in Vancouver, Canada; two outdoor scale-model jet noise facilities; the General Electric Jet Exhaust Noise Outdoor Test Stand in Evendale, Ohio, and the General Electric Corporate Research and Development Center Hot Jet Noise Facility at Schenectady, New York; one large-scale engine outdoor test stand; a super suppressed J79 engine at the General Electric Facility at Edwards Air Force Flight Test Center, California; one aerodynamic performance facility; the FluiDyne Engineering Corporation Aerodynamic Laboratory at Medicine Lake, Minnesota; and the GE Anechoic Jet Noise Test Facility. Numerous noise source location techniques were subjected to a preliminary screening study from which three techniques: the in-jet to far-field correlation approach, the hole-in-the-wall, and ellipsoidal mirror were selected and carried through an experimental demonstration stage. Based on the results from this phase of the activity, the ellipsoidal mirror microphone technique was recommended for use in subsequent program tasks.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 22, 1977
- Accession Number
- ADA041848
Entities
People
- C. T. Savell
- E. J. Stringas
Organizations
- General Electric