公开(公告)号：US5670758A

公开(公告)日：1997-09-23

申请号：US493050

申请日：1995-06-21

申请人： Ingo U. Borchers ,  Stephan T. Laemmlein ,  Peter Bartels ,  Achim Rausch ,  Markus Faust ,  Jan A. F. Coebergh ,  Klaus Koeble

发明人： Ingo U. Borchers ,  Stephan T. Laemmlein ,  Peter Bartels ,  Achim Rausch ,  Markus Faust ,  Jan A. F. Coebergh ,  Klaus Koeble

IPC分类号： B64G1/46 ,  B64G1/00 ,  B64G1/52 ,  B64G1/66 ,  F41B15/08 ,  G10K11/172 ,  E04B1/82

CPC分类号： B64G1/002 ,  F41B15/08 ,  G10K11/172 ,  B64G2001/228

摘要： By means of this acoustic protection it is possible to protect the payloads of expandable launch vehicles effectively against noise emissions from the rocket propulsion system which result in damage of the payloads. For this purpose acoustic absorbers (8) tuned to a defined frequency range are provided and are arranged in foamed plastic mats (7) disposed on the insides (6) of the payload fairing (1). The acoustic absorbers (8) are composed of a cup-shaped lower part (12) and an upper part (13) having a horn (18). The horn (8) tapers in a curved-conical manner from a larger diameter (D.sub.m) to a smaller diameter (D.sub.t) and projects into the lower part (12) by a defined distance (a) from a bottom (14) thereof. Slits (21) for the dissipation of the directed flow energy occurring in the horn (18) are disposed in the wall of the horn in the area of the smaller diameter (D.sub.t).

摘要翻译： 通过这种声学保护，可以有效地保护可扩展运载火箭的有效载荷，从而有效地抵抗导致有效载荷损坏的火箭推进系统的噪声发射。 为此，提供调谐到限定频率范围的吸声器（8）并布置在布置在有效载荷整流罩（1）的内部（6）上的泡沫塑料垫（7）中。 吸声器（8）由杯形下部（12）和具有喇叭（18）的上部（13）组成。 喇叭（8）从较大直径（Dm）到较小直径（Dt）以锥形方式逐渐变细，并从底部（14）突出到下部（12）的距离（a）。 在喇叭（18）中发生的定向流能的耗散的狭缝（21）设置在较小直径（Dt）的区域中的喇叭壁上。