The possibility of reducing the weight, simplifying the design, reducing the time and cost of development, production and operation are important advantages in the implementation of additive technologies (AT). The use of AT can significantly improve fuel efficiency, environmental and other characteristics of aircraft engines. The possibility of using AT in the production of various parts and components of engines is being currently investigated at CIAM. Examples of these developments, advantages of the use of AT and problems arising in the implementation of these technologies are presented in this article. Models of turbine blades with a highly efficient cooling system, in particular, with penetration cooling were designed and manufactured using optimization methods and taking into account the capabilities of AT. The possibilities of using AT for the manufacture of elements of molds for precision casting of gas turbine engine (GTE) blades of heat-resistant alloys and ceramic rods are shown. Elements of a two-zone front module of the low-emission combustion chamber of an advanced GTE are designed and manufactured using the AT method. Research of prospective branched tree channels of heat exchangers with mutually porous bodies that can be made only by AT methods and the use of which will make it possible to increase the efficiency of heat exchange in the case of lower weight, than that of the structures made by traditional technologies, is being carried out. The AT was used to manufacture complex elements of a ramjet engine. Fire tests of printed sections of the combustion chamber were carried out successfully. Cellular structures to be used in gas turbine engine parts with the aim of reducing their weight were developed. A hollow blade model with cellular-type core was made using AT. Tests of the designed cellular prototypes were carried out. The possibilities of reducing the mass of structural elements using cellular structures obtained by AT methods are shown. Research of hollow disks of turbines and other engine components produced with the aid of AT are carried out. Despite the fact that experimental studies of structural elements obtained by additive technologies have not been completed yet, these works show the prospects for the use of AT in the development of a wide range of engine parts and components.
The experimental analysis of heat transfer in plate heat exchange channels, presented in this paper, was carried out on the installation of visualizing the temperature distribution on the surface of the electro-heated air flow cooled heat transfer envelope using a thermal camera. Experimental studies were carried out in a wide range of air flow. In the comparative analysis, the average deviation of the experimental values from the numerical simulation for the Nusselt criterion was about 15%. The worst systematic discrepancy between the Euler numbers (excess of the calculated losses over the experiment) is observed for the hydraulic characteristics of the hilly surface, but it does not exceed +22% in the transition region, decreasing to +14% in the region of developed turbulence. Within these errors, it is possible to use numerical 3d calculations for the development of databases of criteria dependences of corrugated and hilly heat exchange surfaces. To calculate the full-size heat exchangers obtained by calculation criterion dependences for different geometric characteristics of the models of corrugated and hilly surfaces are presented.
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