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31.10.18
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The new PD-14 turbofan aircraft engine, fitted with 3D printed parts, received a type certificate from the Russian Federation Civil Aviation Administration (RFCAA). Certification paves the way for flight testing on board Irkut MC-21 narrowbody airliner prototypes.
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The DP-14 turbofan engine is designed by the Aviadvigatel bureau and produced at the Perm Engine Plant. Being the first domestically developed commercial jet engine since the fall of the Soviet Union, it is meant to power the newest MC-21 airliners, currently undergoing flight testing. As such, it will be offered to future buyers as an alternative to Pratt & Whitney PW1431G geared turbofans, used to power the first two flying prototypes.
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The PD-14 is a modern design, utilizing twenty new and over fifty upgraded materials, developed at the All-Russian Scientific Research Institute of Aviation Materials (VIAM). These include highly heat-resistant monocrystalline nickel alloys for turbine blades and vanes, as well as high‐strength structural steel and wrought nickel and titanium alloys for shafts, discs and housings.
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For the first time in the history of domestic engineering, the engine nacelles are manufactured from polymer composites, allowing for a significant weight reduction, while maintaining the required levels of strength and durability. Another first is the use of additive manufacturing: combustion chamber front device swirlers pictured above are 3D printed at VIAM from locally developed metal powders. The 3D printed parts were tested and found to be fully compliant with design requirements.
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“Thanks to the use of materials developed at VIAM, it became possible to achieve a qualitative change in the basic parameters of the engine operating mode. As a result, specific fuel consumption decreased by 12%, while the efficiency of engine operation and compliance with environmental parameters increased significantly,” – says Dr. Evgeny Kablov, CEO of VIAM.
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