A method for identifying and visualizing foreign particle motion using time-resolved particle tracking velocimetry

N. D. Cardwell, P. P. Vlachos, K. A. Thole

Research output: Contribution to journalArticle

Abstract

Gas turbines for aircraft are designed for operation with a clean inlet air flow. This ideal operational condition is often violated during take-off and landing, where the probability of particle ingestion is high, with sand and dirt being the most commonly observed foreign particles. Current research on particle ingestion has identified several mechanisms that contribute to performance degradation in the turbine: erosion of internal and external surfaces, and flow blockages of film-cooling holes and internal cooling passages. The focus of the study given in this paper is to present a method that identifies the motion of foreign particles within an internal ribbed passage. The method uses a high-resolution, flow field interrogation method known as time-resolved digital particle image velocimetry (TRDPIV). Observations from the two-phase flows showed that particle collisions occurred more frequently on the upstream surface of the ribs, especially in the inlet region. Results from these collisions included substantial particle breakup, and a particle rebounding phenomenon between the upper and lower walls. Comparisons are made to large eddy simulation predicted particle trajectories indicating some agreement, as well as phenomena that are not predicted due to the inherent assumption of the modeling.

Original languageEnglish (US)
Article number021021
JournalJournal of Turbomachinery
Volume133
Issue number2
DOIs
StatePublished - Oct 26 2010

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Velocity measurement
Cooling
Air intakes
Takeoff
Large eddy simulation
Landing
Two phase flow
Gas turbines
Erosion
Flow fields
Turbines
Sand
Trajectories
Aircraft
Degradation

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

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abstract = "Gas turbines for aircraft are designed for operation with a clean inlet air flow. This ideal operational condition is often violated during take-off and landing, where the probability of particle ingestion is high, with sand and dirt being the most commonly observed foreign particles. Current research on particle ingestion has identified several mechanisms that contribute to performance degradation in the turbine: erosion of internal and external surfaces, and flow blockages of film-cooling holes and internal cooling passages. The focus of the study given in this paper is to present a method that identifies the motion of foreign particles within an internal ribbed passage. The method uses a high-resolution, flow field interrogation method known as time-resolved digital particle image velocimetry (TRDPIV). Observations from the two-phase flows showed that particle collisions occurred more frequently on the upstream surface of the ribs, especially in the inlet region. Results from these collisions included substantial particle breakup, and a particle rebounding phenomenon between the upper and lower walls. Comparisons are made to large eddy simulation predicted particle trajectories indicating some agreement, as well as phenomena that are not predicted due to the inherent assumption of the modeling.",
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A method for identifying and visualizing foreign particle motion using time-resolved particle tracking velocimetry. / Cardwell, N. D.; Vlachos, P. P.; Thole, K. A.

In: Journal of Turbomachinery, Vol. 133, No. 2, 021021, 26.10.2010.

Research output: Contribution to journalArticle

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