Efficiency of an Inertial Particle Separator

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

doi:10.2514/6.2013-1080

Cited by 9 publications

(18 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This shows that as the particle Stokes number is reduced the fluid forces are influencing the separation efficiency more. Looking at the overall performance of the glass sphere separation efficiency, OSG-1 performs the best followed by OSG-3 then OSG-2; this is consistent with the results found using the A4 test dust from Barone et al [5] .…”

Section: Resultssupporting

confidence: 80%

“…The cause of this difference was postulated by Barone et al [5] who demonstrated that the location of the recirculation zone (furthest upstream for OSG-2, and furthest downstream for OSG-1) was correlated with the separation efficiency of the OSG. Because the IPS has the same mass flow of air through the core and scavenge flow legs (regardless of OSG), it is reasonable to assume that the fluid dynamic forces causing the change in separation efficiency are related to the OSG and the influence it has on the flow field at the entrance to the scavenge flow leg.…”

Section: Resultsmentioning

confidence: 99%

“…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%

“…To the author's knowledge, the only experimental flow feature data currently available are surface flow oil-streak measurements by Barone et al [5] , and this study only examined the influence of OSG geometry on the location and size of the recirculation zone.…”

Section: Introductionmentioning

confidence: 99%

“…This includes data by Barone et al. [5] showing that the design of the OSG near the bifurcation zone can play a significant role has been qualified using a test dust with a broad range of sizes and shapes yet more specific information is needed to understand the connection between these phenomena.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Inertial Particle Separator Multiphase Dynamics

Barone¹

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Facilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Inertial Particle Separator Multiphase Dynamics

Barone¹

Self Cite

View full text Add to dashboard Cite

show abstract

A Parametric Study of Inertial Particle Separator Geometry

Connolly¹

View full text Add to dashboard Cite

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

show abstract