6
$\begingroup$

Not all but the intake of many helicopters have a bump body. Why? e.g.

enter image description here

enter image description here

enter image description here

enter image description here

Improve this question
$\endgroup$

1 Answer 1

Reset to default
7
$\begingroup$

I don't know of the Apache, but the Russian helicopters have a dust separator there. This link shows how the dust protection system works on the Mi-17. The Mi-28 and Ka-52 have the same engines, so the system probably works similarly.

PZU dust protection system

The system works by making the air follow a curved path from entry to the first stage of the compressor. Due to inertia, heavier-than-air particles are forced to the outside of the curve, which is the center of the intake protrusion. Air in the separator is forced through baffles to separate the dust from the air, then through a channel that leads overboard. A bleed air nozzle at the end of the channel creates vacuum at the baffle section to aid with removing dust.

The system reduces engine performance as it reduces the compression ratio with bleed air.

Improve this answer
$\endgroup$
3
  • $\begingroup$ Basically a cyclonic vacuum cleaner lol. $\endgroup$
    – John K
    Commented Nov 28, 2020 at 15:55
  • $\begingroup$ A giant, 2500 hp vacuum cleaner, yes. I want one. $\endgroup$
    – Efe Ballı
    Commented Nov 28, 2020 at 15:57
  • $\begingroup$ Thank you for your answer but I think your answer would be better if add the details of that link here. again thank you $\endgroup$
    – Roh
    Commented Nov 29, 2020 at 7:11

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .