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TsAGI Science Journal

ISSN 印刷: 1948-2590
ISSN オンライン: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2018026769
pages 65-75

COMPARATIVE NOISE ESTIMATION METHOD FOR GAS TURBINE POWER PLANTS OF JET PLANES

Vladimir Grigor'evich Dmitriev
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky, Moscow region, Russia
Valerii Fedorovich Samokhin
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky, Moscow Region, 140180 Russia

要約

A noise estimation method for comparison of gas turbine power plants of jet planes is described. The method is based on certified acoustic tests of jet planes with a configuration of engines on pylons under a wing. This approach allows us to choose a newly developed airplane from the existing fleet of those engines which, as a part of a power plant, can produce the least environmental noise levels at take-off in terms of EPNdB. The dependence of noise level of airplane power plants on the bypass ratio and take-off thrust of engines is considered. Three groups of power plants are determined based on the "bypass ratio" parameter. Within each group, the power plants with minimum noise level are presented. The approximation dependencies of minimum noise levels on the engine thrust for a twin-engine layout are found for each group of power plants. The excess of the least noise levels of modern power plants is determined relative to the minimum levels of noise reached to the present time. The minimum levels can be an estimation of acoustic perfection degree of the power plants in the group.


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