Engine nacelle

Obara, C.J., Hastings, E.C., Schoenster, J.A., Parrott, T.L. and Holmes, B.J. (1986). Natural laminar flow flight experiments on a turbine engine nacelle fairing. AIAA Paper 86-9756. 

More complex scenarios have been studied in the form of turbulent spray flames and pool fires, which are representative fires found in engine nacelles. Studies... 

W. L. Grosshandler, C. Presser, D. Lowe, W. Rinkinen Assessing Halon alternatives for aircraft engine nacelle fire suppression, J. Heat Transf. 117(2), 489-494 (1995). 

P. J. Disimile, J. R. Tucker, B. Croswell, J. M. Davis The transport of water sprays past generic clutter elements found within engine nacelles. Fire Saf. J. 40, 65-78 (2005). 

J. M. Davis, P. J. Disimile Effect of engine nacelle clutter dcaisily rai downstream water spray distributions, At. Sprays 18(6), 553-569 (2008). 

F for AF-143 and AF-147 indicate that they are targeted for high temperature applications such as aircraft engine nacelle structure. 

Tactix 742 is a tris-(hydroxyphenyl) methane based epoxy, which can be cured for 3 h at 177°C using 38 phr DDS and postcured for 2 h at 250°C with a Tg of 299°C to give composites ideal for components near high heat zones such as aircraft engine nacelles. 

Typical items fabricated from cfrp for an aero engine are shown in Figure 23.22. Parts of the Domier 328 engine nacelle fabricated from cfrp are shown in Figure 23.23. 

Figure 23.23 The cfrp parts of a Dornier 328 engine nacelle, (a) Reverse side of forward cowl, (b) Nacelle forward cowl, (c) Nacelle aft cowl, (d) Nacelle aft cowl completed, (e) Nacelle lower cowl, (f) Nacelle lower cowl fitted out, (g) Assembling nacelle. Source Courtesy of GKN.

Thrust SSC (Super Sonic Car), in 1998, became the first land vehicle to break the sound barrier, achieving 764 mph across the Black Rock desert in Nevada (Figures 23.38, 23.39). Cytec s carbon fiber prepreg was used around the forward position of Thrust s engine nacelles, nose cone, air inlet structures and cockpit canopies. 

Figure 37 Jet engine nacelles are insulated sandwiches which are bonded with heat resistant adhesives including paste or fdm adhesives and syntactic fdm...

Typical Use Aerospace repairs. Metals and composites. BR127 primer Typical Use Aerospace. Engine nacelles. Metals (sheets and ... 

Aircraft company specifications will usually require that the adhesive meet the requirements of one or both of the military specifications. In addition, further more stringent requirements are established that are deemed critical to the particular application. For example, in the case of an adhesive used for bonding engine nacelles, requirements for strength retention after thousands of hours exposure at temperatures of 300 F or higher would be specified. In the case of an adhesive used in a satellite, a limit would be established on outgassing under the... 

Honeycomb details used in a bonded acoustic engine nacelle are shown in Fig. 3. The final assembly will have solid outer skins but the inner skins will be perforated in order to reduce noise levels. 

FM 96 is one of the early adhesives that is representative of this type. It has moderate strength at temperatures up to 300 F. Oxidative stability is excellent which led to its use in areas of the engine nacelle and other hot spots where continuous exposure to temperatures up to 300°F are involved. Some improvement in toughness over unmodified epoxies is achieved through modification with a high molecular weight vinyl resin. As a result moderate metal peel and sandwich peel values can be achieved. This type of adhesive can be shipped and stored... 

PI adhesives have excellent electrical properties and are suitable for high temperature ra-domes. They are also used in veiy hot areas of engine nacelles. 

Figure 61 Rolls Royce engine nacelle component - Vac-Bag assembly before autoclave...

Figure 13.51 Rolls Royce engine nacelle component—Vac-Bag assembly before autoclave curing.

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