THE RESPONSE OF A SWEPT BLADE ROW TO A THREE-DIMENSIONAL GUST

✍ Scribed by S.A.L. GLEGG

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 339 KB
• Volume: 227
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1999.2327

✦ Synopsis

An analytical expression is obtained for the unsteady loading, acoustic mode amplitude, and sound power output of a three-dimensional rectilinear cascade of blades with "nite chord excited by a three dimensional gust. The e!ects of spanwise wave number and cross-#ow are included so that the e!ect of blade sweep and a gust with a spanwise variation can be considered. The results show that the e!ect of the spanwise gust and blade sweep are very similar and reduce the e!ective frequency of the incoming gust. The dominant e!ect is caused by the cut o! of acoustic modes when the trace velocity of the gust along the blade span is subsonic.