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1. WO1989000130 - PROTECTIVE SYSTEM FOR REDUCING THE NOISE OF HIGH-VELOCITY JET STREAMS FROM INBUILT POWER UNITS IN AIRCRAFT

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Publication Number WO/1989/000130
Publication Date 12.01.1989
International Application No. PCT/DE1988/000409
International Filing Date 01.07.1988
IPC
B64F 1/26 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
FGROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
1Ground or aircraft-carrier-deck installations
26for reducing engine or jet noise; Protecting airports from jet erosion
E04B 1/82 2006.1
EFIXED CONSTRUCTIONS
04BUILDING
BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
1Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
62Insulation or other protection; Elements or use of specified material therefor
74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
82specifically with respect to sound only
E06B 3/01 2006.1
EFIXED CONSTRUCTIONS
06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS, IN GENERAL; LADDERS
BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
3Window sashes, door leaves, or like elements for closing openings; Layout of fixed or moving closures, e.g. windows; Features of rigidly-mounted outer frames relating to the mounting of wing frames
01Removable or disappearing walls for hangars or other halls, e.g. for aircraft
CPC
B64F 1/26
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
FGROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
1Ground or aircraft-carrier-deck installations
26for reducing engine or jet noise; Protecting airports from jet erosion
E04B 1/8227
EFIXED CONSTRUCTIONS
04BUILDING
BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
1Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
62Insulation or other protection; Elements or use of specified material therefor
74Heat, sound or noise insulation, absorption, or reflection
82specifically with respect to sound only
8227screens
E06B 3/01
EFIXED CONSTRUCTIONS
06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
3Window sashes, door leaves, or like elements for closing ; wall or like; openings; Layout of fixed or moving closures, e.g. windows ; in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
01Removable or disappearing walls for hangars or other halls, e.g. for aircraft
Applicants
  • RHEINHOLD & MAHLA GMBH [DE]/[DE] (AllExceptUS)
  • SCHAFHAUPT, Horst [DE]/[DE] (UsOnly)
Inventors
  • SCHAFHAUPT, Horst
Agents
  • SEIBERT, Rudolf
Priority Data
P 37 22 112.403.07.1987DE
Publication Language German (de)
Filing Language German (DE)
Designated States
Title
(EN) PROTECTIVE SYSTEM FOR REDUCING THE NOISE OF HIGH-VELOCITY JET STREAMS FROM INBUILT POWER UNITS IN AIRCRAFT
(FR) DISPOSITIF PROTECTEUR AMORTISSEUR DES BRUITS DE PROPULSEURS INCORPORES D'AVIONS PRODUISANT DES COURANTS DE GAZ DE HAUTE VITESSE
Abstract
(EN) In a protective system for reducing the noise of high-velocity jet streams, in particular for aircraft power units, an inclined lattice-type conducting element is installed at a distance from the power units and an approximately horseshoe-shaped noise-absorbing wall whose height is approximately twice that of the conducting element is arranged behind the conducting element. To prevent the radiation of suction noise from the power unit towards the front, two swivelling door wings (16, 17) lined with sound-absorbing material (22, 23) are hinged to the outer front edges (14, 15) of the free sides (8, 9) of the horseshoe-shaped sound-absorbing wall. The door wings can swivel inwards through approximately 60° and their length is such that in the fully swivelled state they leave a gap (a) for the nose of an aircraft (1).
(FR) Un dispositif protecteur amortisseur du bruit produit par des courants de gaz s'écoulant à des vitesses élevées, notament pour propulseurs d'avions, comprend un élément de guidage incliné en forme de grille disposé à une certaine distance des propulseurs. Derrière cet élément de guidage est agencée une paroi d'insonorisation ayant approximativement la forme d'un fer-à-cheval et environ deux fois la hauteur de l'élément de guidage. Afin d'empêcher les bruits d'aspiration produits par les propulseurs de se propager vers l'avant, deux battants (16, 17) pivotables revêtus d'un matériau amortisseur des bruits (22, 23) sont reliés par des charnières aux bords frontaux antérieurs (14, 15) des côtés libres (8, 9) de la paroi d'insonorisation en forme de fer-à-cheval. Les battants (16, 17) peuvent pivoter de 60° environ vers l'intérieur et ont une longueur telle que lorsqu'ils sont à l'état complètement fermé ils laissent libre un écart (a) pour le nez de proue d'un avion (1).
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