Bleed Air Leak Detection Systems
Bleed Air Leak Detection Systems
(OP)
Hi all. I am trying to collect design, performance information and operating/service history for bleed leak detection systems as used on hot bleed air ducting. There are several different methods and implementations of leak detection, including eutectic salts, thermistors, single and dual loop systems. I am particularily interested in newer methods of leakage conveyance such as annular flow to dump points and methods of sensing threshold values. This subject is heating up (pardon the pun) as new design airframes migrate to composites. Any feedback on this subject would be appreciated.





RE: Bleed Air Leak Detection Systems
RE: Bleed Air Leak Detection Systems
RE: Bleed Air Leak Detection Systems
Regards, Wil Taylor
RE: Bleed Air Leak Detection Systems
RE: Bleed Air Leak Detection Systems
RE: Bleed Air Leak Detection Systems
Firstly: B52? Plasgear - you should crawl down the leading edge of a Beverly to change the generator in flight or top up the oils. Damn great Centaurus sleeve valve next to you will give your ears a buzz for days - not to mention the view of the desert from 15,000'!
Jim 787: Excellent. I should have gone with optical pyrometry as, potentially the way to go. Not sure about the 'enough to blow you hand away' this smacks of the 'pink knuckle' method of torqueing up. 'V' band clamps should be torqued, loosened and re-torqued in accordance with basic engineering training and the AMM.
You might also consider 'Systron-Donner' helium tube with a metallic hydride element. I mention the company name (not mine, of course) because they were the first on the scene with it. It would suit leading edge anti-icing systems because it is extremely resistant to vibration.
Plastic tubes? Ye Gods - nice try.
Bleedguru has it right. Very common, simple and cheap + reliable. This is good until the optics are cheap and reliable enough.