Політ. Design, maintenance and diagnostics of aircraft and gas turbines. 2021
Permanent URI for this collectionhttp://er.nau.edu.ua/handle/NAU/49962
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Item Procedure of editing existing polygonal models by SolidWorks system(National aviation university, 2021-04) Rohozhyna, N.; Samoilenko, Ivan; Meleshko, KseniaThe ability to use 3D printing technology directly depends on the quality of the input geometric model. It is usually difficult to see small defects, missing triangles, convex and other deformations of the grid in slicers. There are online services stlfixers that fix network models. They quickly fill in defects, but are limited by the size and number of triangles of the model. In this case, slicers "do not see" the smallest holes in the grid or one / two triangles that protrude beyond the shape of the part, such defects are simply not printed, so in most cases stlfixers are quite enough.Item Preparation of geometric data for 3D prototyping(National aviation university, 2021-04) Momotenko, Ruslana; Terzi, Artem; Vlasenko, YuryiDespite the presence of high-tech CAD/CAM/CAE-systems, the problem of exchanging engineering data, primarily the structural elements of models, remains at this time not fully resolved. Both open data formats, such as STEP, IGES, etc., and polygonal STL formats, etc., do not solve the problem. Of course, these problems increase as the complexity of product models grows, but they also exist when using 3D prototyping technologies.Item Acceleration the aircraft refueling speed using the new conductive sealing materials(National aviation university, 2021-04) Zavgorodia, SofiaThe static electricity is the most crucial hazard of the big volumes of fuel transfer from one custody into another. So its research will be urgent either in civil aviation or in military aircraft operation.Item Analysis of the efficiency of a gas turbine unit with two-stage compression(National aviation university, 2021-04) Pikul, Marina; Otroshchenko, VolodymyrA promising direction in the development of the power engineering is the use of energy-saving technologies based on gas turbine units, which can significantly increase the efficiency of using fossil fuel. In a number of cases, the operation of a gas turbine unit is carried out at modes below the optimum in terms of efficiency. Therefore, the economic efficiency of the unit is of great interest. During the last years, gas turbine efficiencies were successfully improved by raising the compressor pressure ratio and the turbine inlet temperature. The challenge of constantly improving the gas turbine efficiency by these methods has reached a critical moment, raising of the compressor pressure ratio and the turbine inlet temperature ran up to the limit. A high level of these parameters require the using of new expensive durable heat-resistant materials.Item Civil aviation authority of Nigeria(National aviation university, 2021-04) Anyim Iheanyi, MichealNigeria is located in the western part of Africa with over 209 million people, having 36 states with 524 native languages, with English being the Official language. Now talking about Nigeria Civil Aviation Authority (NCAA) was established in 1999 but was passed into Law in 2006 by the Nation Assembly and was approval by the President of the Federal Republic of Nigeria the same year.Item Active magnet bearings(National aviation university, 2021-04) Nwaribe, NicholasA magnetic bearing is a form of bearing that uses magnetic levitation to support a load. Moving parts are supported by magnetic bearings without any physical contact. For example, they can levitate a spinning shaft and allow relative motion with very little friction and no mechanical wear. Magnetic bearings support the highest speeds of any kind of bearing and have no maximum relative speed.