CELLULAR ACOUSTIC STRUCTURE FOR A TURBOJET ENGINE AND TURBOJET ENGINE INCORPORATING AT LEAST ONE SUCH STRUCTURE

摘要

A cellular acoustic structure for a turbojet engine includes a closed wall. The closed wall includes at least two faces having acoustically transparent areas and acoustic reflective areas. The closed wall is filled with a plurality of cells, and the acoustic reflective areas are disposed within the closed wall so that an acoustic path of aerial sound vibrations travels through the acoustically transparent areas, penetrates inside the cells and reflects on the acoustic reflective areas. In particular, the acoustic path in some of the cells has a depth greater than a half of the thickness of the cellular acoustic structure.

主权项

1. A cellular acoustic structure for a turbojet engine comprising:
a closed wall comprising at least two faces including acoustically transparent areas, the closed wall being filled with a plurality of cells; and acoustic reflection means, being disposed within the closed wall so that an acoustic path of aerial sound vibrations travels through said acoustically transparent areas, penetrates inside the cells and reflects on the acoustic reflection means, the acoustic path having in at least some of the cells a depth greater than an half of a thickness of the cellular acoustic structure.