INLET - NAI EXHAUST HOLE DEFINITION FOR REDUCED D-DUCT RESONANCE NOISE AND DILUTED EXHAUST PLUME FOR THERMAL CONTROL
FIG3 illustrates a perspective view of a portion of an inlet of the nacelle of FIG2 including an outer barrel and a lip skin that defines a plurality of exit holes in accordance with various embodiments
Referring to FIG3, the inlet 124 may include an outer barrel 300 and a lip skin 306. The outer barrel 300 may include a plurality of composite panels 302 which included a composite material, such as a carbon fiber and epoxy. The outer barrel 300 may further include a plurality of metal panels 304 which may include a metal material, such as aluminum or steel.
perspective view
305
exit holes
306
lip skin
1
inches between
304
metal panels
322
outer distance
250
bottom
326
middle distance
324
inner distance
308
first circumferential outer hole
318
middle holes
320
angular distance
312
center holes
124
inlet
['1. An inlet (124) for use with a nacelle (122) having an axis (260), comprising: an outer barrel (300); and a lip skin (306) defining a plurality of elongated exit holes (305) including a first circumferential outer hole (308), a second circumferential outer hole (310), and a plurality of center holes (312) located between the first circumferential outer hole (308) and the second circumferential outer hole (310), the first circumferential outer hole (308) being located at least 10 degrees of an entire circumference of the inlet (124) away from the second circumferential outer hole (310).', '5. The inlet (124) of any preceding claim, wherein: the plurality of center holes (312) includes: a first circumferential inner hole (314) located adjacent to the first circumferential outer hole (308), a second circumferential inner hole (316) located adjacent to the second circumferential outer hole (310), and a plurality of middle holes (318) located between the first circumferential inner hole (314) and the second circumferential inner hole (316); an outer distance (322) exists between the first circumferential outer hole (308) and the first circumferential inner hole (314), and a similar outer distance exists between the second circumferential outer hole (310) and the second circumferential inner hole (316); and an inner distance (324) between each of the plurality of middle holes (318) is less than the outer distance (322).', '6. The inlet (124) of claim 5, wherein a middle distance (326) exists between the first circumferential inner hole (314) and the plurality of middle holes (318) and is greater than the inner distance (324).']