Development of a new design of a nozzle with an external cooling jacket for aircraft jet engines and ground power plants
Published: 20.10.2025
Authors: Altunin V.A., Altunin K.V., Abdullin M.R., Gortyshov Yu.F., Pronin K.A., Yusupov A.A., Yanovskaya M.L.
Published in issue: #11(167)/2025
Category: Aviation and Rocket-Space Engineering | Chapter: Thermal, Electric Jet Engines, and Power Plants of Aircrafts
The paper presents the operation analysis results of the standard fuel injector NK-8-2U air-jet engine, the resource of which is limited by the negative process of sedimentation and is 900 hours (cycles) of operation. The analysis of scientific, technical and patent-licensing literature on injectors and burners on liquid hydrocarbon fuels was carried out. It led to a conclusion that their design schemes did not contain any existing and promising methods of combating sedimentation. The results of experimental studies with hydrocarbon fuels and coolants are shown, on the basis of which the authors created and patented new methods of monitoring and combating sedimentation. The existing and promising methods of combating sedimentation in aircraft engines and ground power plants are summarized and classified. The rationale for the need to create a new design scheme of a fuel injector with improved characteristics in terms of resource, reliability and efficiency is given. Based on the standard fuel injector of the NK-8-2U air-breathing engine, a new design scheme of a promising injector with an external cooling jacket has been developed and patented, in which the results of experimental studies and new methods of combating sediment formation have been implemented. A comparative analysis of the resource of failure-free, reliable and safe operation of both injectors has been carried out. From where it has been established that the resource of the new injector can be increased by two or more times, compared to the standard injector of an air-breathing engine or a ground-based gas turbine power plant.
EDN JHGEXD
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