Browsing by Author "Vashcenko, Yaroslav"

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    Improvement of high-pressure turbine blade cooling of a double-circuit turbojet engine for a medium-haul aircraft
    (National Aviation University, 2022-11) Vashcenko, Yaroslav; Ващенко, Ярослав Васильович
    One of the most dynamically developing varieties of aviation GTE in recent years are twin-circuit turbojet engines (turbojet engines) with take-off thrust less than 10 tc, designed for regional aircraft. Aircraft of this class, which occupy an intermediate position between the aircraft of local lines and near main lines, are equipped mainly with double-circuit engines. Relevance of the topic Creation of advanced gas turbine engines, both for aviation technology and for industrial applications in the production and generation of electricity, in gas pumping units and other areas is impossible without a comprehensive increase in the parameters of the operating cycle (the degree of pressure increase in the compressor, gas temperature at the inlet to the turbine). At present, the role and influence of research works in the creation of new GTD has significantly increased. The world aircraft engine industry is one of the most dynamically developing industries. The financial capacity of the world market of gas turbine equipment is very large. The market of production and maintenance of aircraft engines is attractive, many countries of Europe, America and Asia are trying to enter it Three companies are developers of regional aircraft (with TRDD): Embraer (Brazil) - ERJ type; Bombardier (Canada) - CRJ type; BAe Systems Regional Aircraft (UK) - Avro RJ type. Regional aircraft of the considered class are designed to carry 35-110 passengers and have a maximum take-off weight of 15500 ... 50000 kg. The maximum flight range for standard modifications is 1650 ... 3100 km and 2850 ... 4300 km with an increased range. The power plant of most regional aircraft includes two main engines. As a result of the implementation of technical solutions in modern turbofan engines for regional aircraft, the indicators have been achieved: - specific fuel consumption 0.63 ... 0.68 kg / kgs - h; specific weight 0.19 ... 0.22 10 kg / kgs; - operation according to technical condition since commissioning, operating time on the "wing" - not less than 10000 ... 12000 hours; - reduction of service cost by 20 ... 30%; - the level of emission of harmful substances is 40 ... 50% lower than the existing requirements; - noise level - 15 ... 20 dB below the existing requirements. An important feature of the considered power plants is the way of placing the engines: on the fuselage or under the wing. For regional aircraft with a large take-off weight, the option of installing engines on pylons under the wing is preferable. The way the engine is placed on the aircraft affects the choice of its scheme. The main developers and manufacturers of turbofan engines for regional aircraft abroad are four companies: General Electric (USA) - CF34 engines; Honeywell (USA) - LF507-1F, AS900 engines; Rolls - Royce (UK) - AE3007A, AE3007A1 engines; Pratt & Whitney (Canada) - PW306B, PW800 engines.