Авіаційно-космічна техніка та технологія (Jun 2024)
Analysis of systems for cooling liquid injection in turbine engine gas flow duct
Abstract
The subject of this article is a system for cooling liquid injection in gas flow duct of aviation gas-turbine engine (GTE). The goal is to soften the acuteness of contradictions between economic and ecological requirements; ecological requirements and technological limitations; marketing and service life requirements, due to the application of a system for cooling liquid injection in gas flow duct of GTE. The tasks to be solved are: development of a classification, revealing the advantages and drawbacks of various technologies of systems for cooling liquid injection in the gas flow duct of GTE, analysis of the investigation methods used for cooling liquid injection systems, and analysis of the system application experience in various aircraft (A/C) and A/C projects. The methods used are: search of corresponding information sources on the Internet and analysis based on operational experience in the aviation branch. The following results were obtained: in terms of found information sources, classification of systems for cooling liquid injection in the gas flow duct of GTE has been developed; advantages and drawbacks of various cooling liquid injection technologies have been formulated; it was revealed that, three types of methods (experimental, computational fluid dynamic, and analytical) are used for cooling liquid injection system investigation; results of available research are briefly presented; application of cooling liquid injection systems in A/C with the purpose of extending the airplane flight envelop, increasing of aviation GTE thrust/power, and decreasing emissions of nitrogen oxides during takeoff have been analyzed. Conclusions. The scientific novelty of the results obtained is as follows: 1) information from numerous sources of literature that clarifies classification, advantages and drawbacks of various technologies of cooling liquid injection in the gas flow duct, development of these system investigations by various methods, and experience of these systems application both in real A/C, and in A/C projects were collected in the review article; 2) necessity in development of transport category A/C design methodology taking into account installation of the system for cooling liquid injection in the gas flow duct of GTE has been revealed. The goal and challenges of the following research in this field are outlined.
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