| LDR | 02447nam a2200421Ii 4500 | ||
| 001 | 102892925 | ||
| 003 | MiAaHDL | ||
| 005 | 20241208000000.0 | ||
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| 007 | cr bn ---auaua | ||
| 008 | 220630s1971 tnua bt f000 0 eng d | ||
| 035 | ⊔ | ⊔ | ‡a(MiU)99187626100306381 |
| 035 | ⊔ | ⊔ | ‡asdr-miu.99187626100306381 |
| 035 | ⊔ | ⊔ | ‡a(OCoLC)1333965251 |
| 035 | ⊔ | ⊔ | ‡a(GWLA)gwla on1333965251 |
| 040 | ⊔ | ⊔ | ‡aTRAAL ‡beng ‡erda ‡cTRAAL |
| 049 | ⊔ | ⊔ | ‡aMAIN |
| 086 | 0 | ⊔ | ‡aD 301.45/33:71-216 |
| 100 | 1 | ⊔ | ‡aCredle, O. P., ‡eauthor. |
| 245 | 1 | 0 | ‡aPerforated wall noise in the AEDC-PWT 16-ft and 4-ft transonic tunnels / ‡cO.P. Credle. |
| 264 | ⊔ | 1 | ‡aArnold Air Force Base, Tennessee : ‡bArnold Engineering Development Center, Air Force Systems Command, United States Air Force, ‡c1971. |
| 300 | ⊔ | ⊔ | ‡a71 pages : ‡billustrations ; ‡c28 cm |
| 336 | ⊔ | ⊔ | ‡atext ‡btxt ‡2rdacontent |
| 337 | ⊔ | ⊔ | ‡aunmediated ‡bn ‡2rdamedia |
| 338 | ⊔ | ⊔ | ‡avolume ‡bnc ‡2rdacarrier |
| 490 | 0 | ⊔ | ‡aAEDC-TR ; ‡v71-216 |
| 500 | ⊔ | ⊔ | ‡aReport was prepared by ARO, Inc., a subsidiary of Sverdrup & Parcel and Associates, Inc. |
| 500 | ⊔ | ⊔ | ‡aFinal Report: September 1969 to December 1970." |
| 500 | ⊔ | ⊔ | ‡a"October 1971." |
| 504 | ⊔ | ⊔ | ‡aIncludes bibliographic references (page17). |
| 520 | ⊔ | ⊔ | ‡aThe report presents the results of recent studies of noise in Propulsion Wind Tunnel (16T) and Aerodynamic Wind Tunnel (4T). Noise levels in the free stream and at the test section wall were measured in both tunnels as a function of Mach number, Reynolds number, wall angle, and wall porosity. In Tunnel 4T, free-stream noise characteristics were also evaluated with solid (taped) test section walls. Test results revealed that the perforated test section wall holes generate discrete frequency, high energy noise. In Tunnel 16T, there is a critical Mach number range in which a wall hole frequency. Test section noise levels were found to vary slightly with wall angle and significantly with Mach number and wall porosity. The wall porosity corresponding to the minimum noise levels was found in Tunnel 4T. (Author). |
| 538 | ⊔ | ⊔ | ‡aMode of access: Internet. |
| 650 | ⊔ | 0 | ‡aWind tunnels ‡xNoise. |
| 650 | ⊔ | 0 | ‡aWind tunnel walls. |
| 650 | ⊔ | 0 | ‡aTransonic wind tunnels. |
| 710 | 2 | ⊔ | ‡aARO, Inc., ‡esponsor. |
| 710 | 2 | ⊔ | ‡aArnold Engineering Development Center, ‡esponsor. |
| 710 | 1 | ⊔ | ‡aUnited States. ‡bAir Force. ‡bSystems Command, ‡eissuing body. |
| 730 | 0 | ⊔ | ‡aTechnical Report Archive & Image Library (TRAIL) |
| 899 | ⊔ | ⊔ | ‡a39015104952521 |
| CID | ⊔ | ⊔ | ‡a102892925 |
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| DAT | 2 | ⊔ | ‡a2024-07-29T17:30:02Z |
| CAT | ⊔ | ⊔ | ‡aSDR-MIU ‡cmiu ‡dALMA ‡lprepare.pl-004-008 |
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| 974 | ⊔ | ⊔ | ‡bMIU ‡cGWLA ‡d20241208 ‡sgoogle ‡umdp.39015104952521 ‡y1971 ‡rpd ‡qbib ‡tUS fed doc |