Computational analysis of stall and separation control in centrifugal compressors

Stein, A.; Niazi, Saeid; Sankar, Lakshmi N.

doi:10.2514/6.1998-3296

Cited by 15 publications

(12 citation statements)

References 10 publications

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“…Согласно результатам экспериментальных исследований [1][2][3] помпаж возникает в результате возникновения внутри проточной части развитых отрывных течений. Следовательно, для расширения диапазона устойчивой работы целесообразно использовать способы управления отрывом потока, одним из которых является вдув [4][5][6][7][8].…”

Section: анализ основных достижений и литературыunclassified

“…Штейн и др. [6] численно смоделировали течение в рабочем колесе центробежного компрессора, работающем в помпаже. Авторами было установлено, что вдув на входе в рабочее колесо предотвращает местный отрыв потока, который провоцирует масштабные обратные течения, за счет чего улучшается устойчивость работы колеса.…”

Section: анализ основных достижений и литературыunclassified

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Extension of the Range of the Stable Operation of the Stage of the Centrifugal Compressor by Actuating Medium Blowing in the Vaneless Diffuser

Kalinkevych¹,

Shcherbakov²

2015

NTU "KhPI" Bulletin

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УДК 621.515 Н. В. КАЛИНКЕВИЧ, канд. техн. наук, доц.; проф. кафедры технической теплофизики Сумского Государственного университета; О. Н. ЩЕРБАКОВ, канд. техн. наук; ведущий инженер-конструктор ПАО «Сумское НПО им. М.В. Фрунзе» РАСШИРЕНИЕ ДИАПАЗОНА УСТОЙЧИВОЙ РАБОТЫ СТУПЕНИ ЦЕНТРОБЕЖНОГО КОМПРЕССОРА ЗА СЧЕТ ВДУВА РАБОЧЕЙ СРЕДЫ В БЕЗЛОПАТОЧНОМ ДИФФУЗОРЕ В работе представлены результаты экспериментального исследования вдува в безлопаточном диффузоре ступени центробежного компрессора. Исследования проводились на аэродинамическом стенде ПАО «СНПО им. Фрунзе». Вдув осуществлялся в радиальном направлении, вдуваемый воздух подавался от внешнего источника. При проведении экспериментальных исследований определялось влияние расхода вдуваемого воздуха на границу возникновения помпажа, а также на безразмерные характеристики ступени. Было доказано, что вдув в безлопаточном диффузоре позволяет расширить диапазон устойчивой работы ступени в области малых производительностей. Ключевые слова: центробежный компрессор, безлопаточный диффузор, диапазон устойчивой работы, помпаж, вдув.

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Section: анализ основных достижений и литературыunclassified

Extension of the Range of the Stable Operation of the Stage of the Centrifugal Compressor by Actuating Medium Blowing in the Vaneless Diffuser

Kalinkevych¹,

Shcherbakov²

2015

NTU "KhPI" Bulletin

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“…An example of flow injection can be observed in the work of Stein et al (2000). They stated that considerable experimental evidences have been reported showing that the air injection in a steady or unsteady fashion improves the overall operability of the compressor.…”

Section: Introductionmentioning

confidence: 99%

Improving the Performance of Centrifugal Compressors by Flow Recirculation

Torshizi

2019

JAFM

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The impeller of a centrifugal compressor is traditionally designed using some formula for only one design point which makes it less efficient in all other situations. This is especially important for compressors not experiencing a constant working condition. To improve the performance at low mass flow rates and retard the surge, an innovative concept is introduced for a centrifugal compressor. In this method pressurized air is injected at the compressor inlet to improve the flow field. With better incidence angle, related losses at off design conditions are minimized and the surge is delayed. This system is designed, modeled and adjusted for providing an optimal flow pattern at the inlet. Its implementation on a compressor has shown an increase of efficiency at low mass flow rates. It has also improved flow pattern in impeller passages and decreased the blade loading near surge condition. It is also shown that the swirl generator system can be fed up from the compressor volute or diffuser, and thus widening the compressor performance map by retarding the surge margin.

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“…To control rotating stall and surge in a centrifugal compressor, various design features have been investigated: selfcirculation device [13], variable inlet guide vanes (VIGV), adjustable vaned diffuser vanes, ported shroud [15], grooved diffuser [16], air injection, or bleeding [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations of Surge Extension on a Centrifugal Compressor with Vaned Diffuser Using Steam Injection

Gao¹,

Huang²,

Zheng³

et al. 2017

International Journal of Rotating Machinery

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This paper presents the first report on surge extension with steam injection through both experimental and numerical simulation. The experimental section covers the test facility, instrumentation, and prestall modes comparison with and without steam injection. It is found that surge extension is not in proportion to injected steam. There exists an upper bound above which deteriorates the margin. Injection of less than 1% of the designed mass flow can bring about over 10% margin improvement. Test results also indicated that steam injection not only damps out prestall waves, but also changes prestall modes and traveling direction. At 90% speed, injection changed the prestall mode from spike to modal, while at 80% speed line, it made the forward traveling wave become backward. Through numerical simulation, location and number of injectors, molecular weight, and temperature of injected gas are modified to explore their influences on surge margin. Similar to the test results, there exists an upper bound for the amount of steam injected. The flow field investigation indicates that this bound is caused by the early trigger of flow collapse due to the injected steam which is similar to the tip leakage flow spillage caused spike stall in axial compressors.

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Computational analysis of stall and separation control in centrifugal compressors

Cited by 15 publications

References 10 publications

Extension of the Range of the Stable Operation of the Stage of the Centrifugal Compressor by Actuating Medium Blowing in the Vaneless Diffuser

Extension of the Range of the Stable Operation of the Stage of the Centrifugal Compressor by Actuating Medium Blowing in the Vaneless Diffuser

Improving the Performance of Centrifugal Compressors by Flow Recirculation

Experimental and Numerical Investigations of Surge Extension on a Centrifugal Compressor with Vaned Diffuser Using Steam Injection

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