Sampling Submicrometer Particles Suspended in Near Sonic and Supersonic Free Jets

Martone, Joseph A.; Daley, Peter S; Boubel, Richard W.

doi:10.1080/00022470.1980.10465127

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…4 has been used to establish the validity of extending Zenker's 7 results to predict subisokinetic sampling errors in compressible flows. The prediction technique was applied to sampling gas turbine engine exhausts using an ARP 1179 smoke probe.…”

Section: Discussionmentioning

confidence: 99%

“…This means that a typical smoke probe located at the exit nozzle of an aircraft engine operates at about 20 to 33% of the isokinetic sampling velocity. 3 Using this information and the findings of Martone, et al, 4 it is possible to estimate subisokinetic sampling errors associated with smoke probe operation. It should be noted that the EPA procedure 1 permits multipoint manifolded sampling probes with no specification for their physical dimensions, thus the entrance velocity at each orifice could be appreciably different from the velocity at the inlet of a single element smoke probe.…”

Section: Us Air Force Armament Development and Test Center (Adtc)mentioning

confidence: 98%

“…The study conducted by Martone, et al 4 used small bore aspirated probes to obtain samples of submicrometer particles suspended in unheated near sonic and supersonic free jets. Subisokinetic sampling errors were determined for free jet velocities of Mach 0.6,0.8,1.26, and 1.47.…”

Section: Introductionmentioning

confidence: 99%

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Subisokinetic Sampling Errors for Aircraft Turbine Engine Smoke Probes

Martone¹

1978

Journal of the Air Pollution Control Association

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Section: Discussionmentioning

confidence: 99%

Section: Us Air Force Armament Development and Test Center (Adtc)mentioning

confidence: 98%

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Subisokinetic Sampling Errors for Aircraft Turbine Engine Smoke Probes

Martone¹

1978

Journal of the Air Pollution Control Association

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“…The probe design pictured in Figure 1 was developed by Dehne (1980) for the Acurex Corporation and additional data have been recorded by Martone and Daley (1980). As shown in Figure 1, the probe features a sharp leading edge at the probe entrance.…”

Section: Dehne Probe Design (Internal Shock)mentioning

confidence: 99%

Supersonic Particle Probes: Measurement of Internal Wall Losses

Ivie¹,

Forney²,

Roach³

1990

Aerosol Science and Technology

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In the present study, the operating characteristics of supersonic particle probes are investigated. In particular, characteristics such as internal wall deposition and pressure recovery are examined. Three basic probe designs were tested in a cold flow experiment designed to simulate the hot, hostile environment of rocket and jet engine plumes. The probe designs consisted of two internal shock probes (Dehne and Colket probes) and one external shock probe (McGregor probe). In the internal shock probes the compression from supersonic to subsonic flow occurred either in a constant area throat (Dehne) or at a sudden expansion (Colket). In the external shock or McGregor probe, the shock was positioned slightly outside the entrance of the probe.From deposition studies performed on the probes, three factors were found to enhance deposition. These factors were: 1) shock-boundary layer interaction, 2) particle-boundary layer interaction, and 3) stagnation zones at sudden expansions. The probe with the lowest deposition was a McGregor probe with a 2.0" divergence angle. Using test particles with diameters of 1.0, 1.5, 2.0, and 2.5 pm, the average losses in the McCregor probe were 14% while in the Colket and Dehne probes the losses were 18% and 22070, respectively. Pressure recovery was also found to be the greatest in the McGregor probe with 48% of the initial stagnation pressure regained. The Colket probe had only a 7% pressure recovery.

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Measurement of Cloud and Aerosol Particles from Aircraft

Wilson

Jonsson

2011

Aerosol Measurement

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Sampling Submicrometer Particles Suspended in Near Sonic and Supersonic Free Jets

Cited by 6 publications

References 6 publications

Subisokinetic Sampling Errors for Aircraft Turbine Engine Smoke Probes

Subisokinetic Sampling Errors for Aircraft Turbine Engine Smoke Probes

Supersonic Particle Probes: Measurement of Internal Wall Losses

Measurement of Cloud and Aerosol Particles from Aircraft

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