Inertial Particle Separator Efficiency Using Spherical Particles

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

doi:10.2514/6.2013-3666

Cited by 7 publications

(12 citation statements)

References 10 publications

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“…With verification of the model, it is then applied to each of the particle sets. be important for the smallest size particles, and this is consistent with the inviscid model of * The data in figures 4.13 and 4.14 were previously reported by Barone et al [34] with the abscissa and ordinate accidentally axis switched.…”

Section: Resultssupporting

confidence: 77%

“…6.1a) show that most of the particles (98.15%) bounce through the IPS and into the scavenge flow leg. This generally agrees with the experimental data from Barone et al [34] that showed high efficiency (> 98%) of 120 µm glass spheres for several IPS geometries. The paths for the 10 µm sand particles (Fig.…”

Section: Chapter 6 Ips Particle Dynamicssupporting

confidence: 82%

“…In addition, these particular sizes are critical as they represent the lower end of the particle size distribution of typical test dusts. The 10µm particles were also found to have a large undesirable influence on separation performance as noted by Barone et al [34] .…”

Section: High-speed Video Of Glass Particle Dynamicsmentioning

confidence: 68%

“…inefficiency is not predicted in the steady-state model of Barone et al [34] . This may explain, the inability of the model to account for low separation efficiency with these smaller inertia 10 micron particles.…”

Section: High Speed Videomentioning

confidence: 91%

“…The IPS test section utilizes a two-dimensional geometry in the right-ward direction). The particle separation efficiency by mass has been previously quantified in detail using A4 test dust [5] and several sizes of glass spheres [34] .…”

Section: Facilitymentioning

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: Resultssupporting

confidence: 77%

Section: Chapter 6 Ips Particle Dynamicssupporting

confidence: 82%

Section: High-speed Video Of Glass Particle Dynamicsmentioning

confidence: 68%

Section: High Speed Videomentioning

confidence: 91%

Section: Facilitymentioning

confidence: 99%

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Inertial Particle Separator Multiphase Dynamics

Barone¹

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Unsteady Flow Dynamics Within an Inertial Particle Separator

Snyder

Barone

Loth

2015

Volume 1: Aircraft Engine; Fans and Blowers; Marine

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Inertial Particle Separators are utilized in the inlet of a gas turbine engine to remove a significant fraction of the damaging sand and dust particulate ingested by the engine. In gas turbine propulsion applications these devices have pressure loss, space claim, and maintainability characteristics that are more favorable than other types of particle separating devices. Maximizing the particle separation efficient of such devices is the subject of continuing importance. A more complete understanding of the underlying fluid and particulate flow mechanisms present has been undertaken. This study focuses on the how particulate is affected by the unsteady flow dynamics within the inertial particle separator (IPS). The work utilized a particle separator test rig with flow path scale and airflow velocities relevant to that used in current production designs. The techniques of surface flow visualization, net separation efficiency measurement, specific geometry changes, traditional Particle Image Velocimetry (PIV), Multi-Phase PIV (MP-PIV), and high speed video were each applied to examine the fundamental flow physics of the fluid flow field and the particle motion created by the IPS geometries.

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