Apparatus and method for reducing noise emissions

专利名称：Apparatus and method for reducing noise

emissions from a gas turbine engine inlet

发明人：Dougherty, Robert P.申请号：EP97202179.4申请日：19970711公开号：EP08237A1公开日：19980211

专利附图：

摘要：Noise attenuating linings for a turbofan engine inlet are installed around theupper crown area (94,92) and/or around the lower lip (112-116). The acoustical lining atthe upper crown area (90-91) attenuates those fan noise emissions which are normally

reflected from the crown area downward toward the ground. The acoustical lining at thelower inlet lip (111-106) attenuates those fan noise emissions which travel along the innersurface of the lip and are diffracted around the lower lip downward toward the ground.

申请人：THE BOEING COMPANY

地址：P.O. Box 3707, M.S. 13-08 Seattle, Washington 98124-2207 US

国籍：US

代理机构：Land, Addick Adrianus Gosling

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