Abstract:
The presently disclosed linear detonation wave diverter (600) provides a structure and method for quickly and controllably venting a detonation event out of the diverter without igniting working fluid upstream of a microporous barrier (626) within the linear detonation wave diverter. Further, the detonation wave is linearly vented out of the diverter upon the failure of a burst member (682), which provides a low resistance path for detonation waves to exit the detonation wave diverter.
Abstract:
Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Schallabsorbers, dessen Außenwandung (29) mit einer Vielzahl von Ausnehmungen (30) versehen ist, mit innerhalb des Schallabsorbers jeweils den Ausnehmungen (30) zugeordneten trichterartigen Kegelelementen (31), welche eine im Durchmesser größere radial nach außen weisende Öffnung (32) und eine kleinere radial nach innen weisende Öffnung (33) aufweisen, wobei benachbarte Kegelelemente (31) jeweils an einem streifenförmigen ersten Trägerband (34) ausgebildet werden, mit radial innerhalb zu den Kegelelementen (31) angeordneten, jeweils ein Kegelelement (31) aufnehmenden Napfelementen (35), wobei benachbarte Napfelemente (35) jeweils an einem streifenförmigen zweiten Trägerband (36) ausgebildet werden, wobei die ersten Trägerbänder (34) nebeneinander in einer ersten Richtung angeordnet und die zweiten Trägerbänder (36) nebeneinander in einer zweiten Richtung angeordnet werden, wobei sich die Richtungen überkreuzen und die Trägerbänder (34, 36) zur Ausbildung eines starren Körpers miteinander und mit der Außenwandung (29) gefügt werden.
Abstract:
The proposed device for controlling vortex structures (5) in a turbulent air jet (3) flowing out of the air exhaust channel, which is constituted by at least one pair of needles (1) connected to an AC voltage source to create a pulsating corona discharge between the needles. One needle is located along and the other across the flow to produce a resonant effect of the pulsating corona discharge on the vortex structures. In the proposed method for controlling vortex structures in a turbulent air jet, at least one pair of needles connected to an AC voltage source to create a pulsating corona discharge between the needles. One needle is located along and the other across the flow to produce a resonant effect of the pulsating corona discharge on the vortex structures.
Abstract:
The proposed device for controlling vortex structures (5) in a turbulent air jet (3) flowing out of the air exhaust channel, which is constituted by at least one pair of needles (1) connected to an AC voltage source to create a pulsating corona discharge between the needles. One needle is located along and the other across the flow to produce a resonant effect of the pulsating corona discharge on the vortex structures. In the proposed method for controlling vortex structures in a turbulent air jet, at least one pair of needles connected to an AC voltage source to create a pulsating corona discharge between the needles. One needle is located along and the other across the flow to produce a resonant effect of the pulsating corona discharge on the vortex structures.
Abstract:
The presently disclosed linear detonation wave diverter (600) provides a structure and method for quickly and controllably venting a detonation event out of the diverter without igniting working fluid upstream of a microporous barrier (626) within the linear detonation wave diverter. Further, the detonation wave is linearly vented out of the diverter upon the failure of a burst member (682), which provides a low resistance path for detonation waves to exit the detonation wave diverter.
Abstract:
In the active muffler disclosed herein, a porous flow resistive member defines a wall of a duct carrying a noisy flow, e.g., a jet exhaust. The flow resistive member is characterized by having a flow resistance substantially less than rho C, the characteristic impedance of the acoustic medium. Loudspeakers in a chamber on the side of said porous member opposite the duct are actuated to reduce acoustic pressure in the region between the porous member and the loudspeaker, thereby increasing the acoustic flow through the porous member which in turn increases the dissipation of acoustic energy in the duct. The apparatus is particularly effective at low frequencies where a passive dissipative muffler would be of impractical size.
Abstract:
Technologies for providing noise shielding are described herein. In some examples, noise shields are installed proximate to one or more of the main engines of the aircraft. The noise shields can be extended during terminal operations and retracted during flight operations.
Abstract:
La présente invention se rapporte à un cône d'éjection pour turboréacteur d'aéronef comportant une partie avant présentant une extrémité avant équipée d'une bride de liaison (9a) à une sortie d'un turboréacteur et/ou une extrémité arrière équipée d'une bride de liaison (9b) à une partie arrière du cône d'éjection, ladite partie avant étant en outre équipée d'au moins une structure d'atténuation acoustique comprenant une peau externe (52) correspondante, caractérisée en ce que la peau externe vient en chevauchement avec au moins une partie de la bride de liaison amont ou aval correspondante et est assemblée à cette dernière.