TECHNICAL MECHANICS
ISSN (Print): 1561-9184, ISSN (Online): 2616-6380

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UDC 533.6.011

Technical mechanics, 2017, 3, 16 - 22

FEATURES OF ALGORITHMS FOR COMPUTING THE FLOW IN THE PASSAGE OF A COUNTER-PRESSURE AIR INTAKE

DOI: https://doi.org/10.15407/itm2017.03.016

V. I. Tymoshenko, V. P. Halynskyi

V. I. Tymoshenko
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine
Ukraine

V. P. Halynskyi
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine
Ukraine

      Air intake shape designing is the key problem in the development of a ramjet. The aim of this paper is to formulate an algorithm for on-the-fly computing of supersonic flow stagnation in the passage of an air intake at its predesigning stage. Consideration is given to computing flows in the passages of counter-pressure air intakes by the marching method using a quasi-one-dimensional approach to computing the subsonic flow at the passage outlet and by the time relaxation method. The efficiency of these methods is compared. It is suggested that the gas-dynamic flow parameters be determined at the predesigning stage using the algorithm of on-the-fly computing by the marching method with the determination of the normal shock position for which the required flow velocity coefficient at the outlet section of the air intake passage is realized.

ramjet, air intake, velocity coefficient, total pressure recovery factor, marching calculation, relaxation method, on-the-fly calculation algorithm.

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DOI: https://doi.org/10.15407/itm2017.03.016

Copyright (©) 2017 V. I. Tymoshenko, V. P. Halynskyi

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