A 2-D Inertial Particle Separator Research Facility

Barone, Dominic; Loth, Eric; Snyder, Philip H.

doi:10.2514/6.2012-3290

Cited by 11 publications

(18 citation statements)

References 4 publications

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“…To determine the effects of the PDS ejector air on the tunnel a second oil-streak test was Oil-streak results for the tunnel where originally presented at the 28th AIAA Aerodynamic Measurement Technology, Ground Testing, and Flight Testing Conference [8] . These results where incorrectly reported with a scavenge split of 0.16, the actually scavenge split was 0.10.…”

Section: Surface Flow Visualization Resultsmentioning

confidence: 99%

“…A facility was designed to create the specific branching flow conditions present in an IPS system, a detailed description can be found in previous work [8] . The system is capable of several measurements, including overall sand separation efficiency, surface flow visualization, and quantitative optical internal flow diagnostics.…”

Section: Methodsmentioning

confidence: 99%

“…These particles can be highly damaging to the internal components of a gas turbine engine, significantly reducing its lifetime [8][9][10][11]16] . Aircraft in sandy areas, particularly helicopters and other vertical takeoff and landing aircraft, are at enhanced risk because their downwash introduces particles into the air around the aircraft [27] .…”

Section: Introductionmentioning

confidence: 99%

“…When a turbine engine ingests sand or dust, the components of the engine may undergo highly damaging erosion, and the engine life can be significantly reduced [8][9][10][11] . This presents a major readiness, cost, and maintenance issue for military and civilian missions during low altitude operations in sandy areas such as the Middle East.…”

Section: Introductionmentioning

confidence: 99%

“…. 98 6.2 Experimental setup showing pictures of a) the wind tunnel showing the PDS (1), olive oil seed bar (2), tunnel air intake (3), test section (4), scavenge filter (5), core filter (6), and b) the PIV laser (7), and camera (8) …”

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confidence: 99%

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Inertial Particle Separator Multiphase Dynamics

Barone¹

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The effects of sand and dust ingestion often limit the useful life of turbine engines operating in austere environments and efforts are needed to reduce the quantity of particulate entering the engine. Several Engine Air Particle Separation (EAPS) systems exist. In particular, Inertial Particle Separators (IPS) are of interest because they offer significant weight savings and are more compact. However, they do not yet provide separation efficiencies as high as that from barrier filter and vortex-tube separator technologies. In order to further improve the efficiency of IPS systems, an in depth study of the multiphase flow dynamics has been undertaken.An experimental approach was chosen to fill the void of available data and provide useful information for model validation. A wind tunnel has been designed, constructed and tested to study the multiphase flow dynamics of an inertial particle separator. The experimental facility includes a rectangular test-section ideal for optical access, and is capable of reproducing full-scale flow and particle conditions seen in separator systems. Separation efficiencies were measured for A4 Coarse Test Dust over a range of operating conditions for several geometries.Results show that the separation efficiency is dependent on the scavenge flow split and strongly dependent on the outer surface geometry. Further separation efficiency tests where conducted using nominally sized 10 µm, 35 µm, and 120 µm glass spheres to eliminate the complexities of dust size, shape, and density that are present in Arizona Test Dust. A model was then created to determine the separation efficiency for particles of any given size. iv Several flow visualization techniques were performed to determine the fluid and particle dynamics. Oil-streak flow visualization was utilized to characterize the flow along the walls of the IPS to determine the location of the recirculation zone and to verify that sidewall effects were minimal. Particle Image Velocimetry (PIV) was utilized to quantify the fluid flow field using small olive oil tracer particles. PIV was further utilized using 10 µm and 35 µm glass-spheres to determine the particle velocities in the IPS. Finally, high-speed video was used to capture the dynamics of the particle-fluid interactions. These experiments have shown the dynamic instabilities present in an IPS system that lead to lower separation efficiencies compared with other EAPS systems. The identification of these instabilities will help to improve future IPS designs. Also, the data collected during the course of this study provides the first reference of comparison for computational modeling of an IPS. for the last few years, but he has taught me a great deal. I couldn't ask for a better advisor.

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Section: Surface Flow Visualization Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Inertial Particle Separator Multiphase Dynamics

Barone¹

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Deformation behavior of rubber composite based on FEA and experimental verification

Shan

Cui

Zhang

et al. 2022

Science and Engineering of Composite Materials

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A novel separating device, Inertial particle separator (IPS), has been developed recently to separate solid particles and to protect the turbine engine from particle erosion damage. Herein first, an advanced model based on IPS was proposed to investigate the deformational behavior of deformable particle separator, and to meet the higher requirements of sand discharge and pneumatic demand, which are operated under hostile working conditions or environments and severe climate conditions. We established a three-dimensional (3D) nonlinear finite element analysis (FEA) model of bump consequently, which was the core of centerbody. The essential material parameters of the FEA model were obtained via experimental data (tensile testing). By comparing the influence of these factors (pressure and laying angle), the deformational behavior of the centerbody was discussed. Finally, based on the simulation results with the experimental data (Schlieren testing), the model was found to perform with high reliability and accuracy, demonstrating the great capability in precisely predicting the deformational characteristics of the bump under practical working environments.

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A Parametric Study of Inertial Particle Separator Geometry

Connolly¹

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An Inertial Particle Separator (IPS) is a particulate removal device typically installed at the inlet of a gas turbine to mitigate effects of sand ingestion on the engine. This system can minimize particulate ingestion during helicopter landings in austere brown-out conditions so as to increase engine life. Typically, IPS systems have lower engine power losses than alternative engine inlet filtration technologies.The present studies investigated a variety of novel IPS geometries. Tests were conducted on a fundamental twodimensional experimental facility that allows optical access. Geometries were evaluated using a variety of performance criteria. Of primary import is particle separation efficiency which measures the effectiveness of the system at removing particulate from the core engine flow stream. The separation efficiency of a particular IPS configuration is reliant in part on the characteristics of the flowfield, especially for finer particulate. Low scavenge air mass flow fractions are desirable, as it is directly related to the amount of power diverted from the engine to power the IPS. However, lowering scavenge mass flow fraction increases rates of flow separation and instability, leading to lost particle separation efficiency. There is a lack of available experimental data for IPS geometries designed to operate effectively at these low scavenge mass flow fractions.Modifications from a baseline geometry were made to the scavenge leg and Outer Surface Geometry (OSG).Performance was evaluated based on particle separation efficiency, Particle Image Velocimetry (PIV), surface flow visualization, first order predictive methods, as well as power loss and mass flow rate variations. These experiments showed that reductions in the scavenge channel height were effective at increasing separation efficiency at low scavenge mass flow fraction. Additionally, these modifications successfully reduced flow instability and demonstrated a link between flow separation and particle separation efficiency. The present studies provide comprehensive empirical data to guide future development of IPS geometries specifically optimized to perform effectively at low power levels.4

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A 2-D Inertial Particle Separator Research Facility

Cited by 11 publications

References 4 publications

Inertial Particle Separator Multiphase Dynamics

Inertial Particle Separator Multiphase Dynamics

Deformation behavior of rubber composite based on FEA and experimental verification

A Parametric Study of Inertial Particle Separator Geometry

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