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Изменение нестационарной структуры потока в компрессорах, предшествующее нарушению газодинамической устойчивости. Эксперимент

Изменение нестационарной структуры потока в компрессорах, предшествующее нарушению газодинамической устойчивости. Эксперимент

Abstract

The experimental investigation of an unsteady flow pattern in the models stages of various purpose for the compressor assemblies of modern turbofans has revealed, when approaching the surge line, a physical phenomenon which is characterized by: 1) forming, as a result of separation, of a non-uniformity of the circumferential flow rotating together with the wheel;2) redistribution of pulsation energy with the decrease of the air flow to the frequency band Df = 0-fwh Zwh. The symptom hasbeen obtained and proposed for early diagnostics of the approaching surge threshold.

На основании экспериментального исследования нестационарной структуры потока в моделях ступеней различного назначения для компрессорных узлов современных ТРДД обнаружено при подходе к границе газодинамической устойчивости физическое явление, характеризующееся: 1) формированием вследствие отрыва окружной неоднородности потока, вращающейся вместе с колесом; 2) перераспределениемэнергии пульсаций при уменьшении расхода воздуха в полосу частот D f = 0 fрот Zрк. Получен признак дляопережающей диагностики приближения к границе устойчивости.

Keywords

КОМПРЕССОР, НЕСТАЦИОНАРНАЯ СТРУКТУРА ПОТОКА, ПУЛЬСАЦИИ ДАВЛЕНИЯ, СПЕКТРАЛЬНЫЙ АНАЛИЗ, ГАЗОДИНАМИЧЕСКАЯ УСТОЙЧИВОСТЬ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze