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Friday, July 17, 2020 | History

1 edition of Velocity and orientation effects on the 10-mm Dorr-Oliver cyclone found in the catalog.

Velocity and orientation effects on the 10-mm Dorr-Oliver cyclone

Velocity and orientation effects on the 10-mm Dorr-Oliver cyclone

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Published by U.S. Dept. of the Interior, Bureau of Mines in [Avondale, Md.] .
Written in English

    Subjects:
  • Mine dusts -- Measurement -- Equipment and supplies -- Testing.,
  • Separators (Machines) -- Testing.

  • Edition Notes

    Bibliography: p. 11.

    Statementby Andrew B. Cecala ... [et al.].
    SeriesReport of investigations / United States Department of the Interior, Bureau of Mines ;, 8764, Report of investigations (United States. Bureau of Mines) ;, 8764.
    ContributionsCecala, Andrew B.
    Classifications
    LC ClassificationsTN23 .U43 no. 8764, TN312 .U43 no. 8764
    The Physical Object
    Pagination11 p. :
    Number of Pages11
    ID Numbers
    Open LibraryOL2815757M
    LC Control Number83600008

    Given the complex separation mechanisms of the particulate mixture in a hydrocyclone and the uncertain effects of particle size and shape on separation, this study explored the influence of the maximum projected area of particles on the separation effect as well as single and mixed separations based on CFD–DEM (Computational Fluid Dynamics and Discrete Element Method) coupling and Cited by: 2. Journal: Excerpted from a book “Instrumentation For Dust measurement the CIP 10 and the 10 mm cyclone Dorr—Oliver are evaluated on laboratory experimental basis. The results show a compliance of both instruments when used in various aerosol size distribution 10 mm cyclone satisfies the new CEN/ISO respirable convention in.

    The 10 mm Dorr‐Oliver cyclone approximates the ACGIH curve at a flow rate of L/min, with a 50% cut‐point at d ae = μm. Particulates are collected onto 37 mm filters in standard 3‐part by: "The Cyclone differs from other roller coasters in being a work of art and old, decrepit, rusting in its metal parts and peeling in its more numerous wooden parts." Word that recreate the SIGHT of something are said to evoke _____ images.

    Start studying Ch. 17 Speed, Agility, and Speed-Endurance Development. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The filtering process involves a mm Dorr-Oliver cyclone (Zefon International). To introduce an acronym after it has been written out: Units will be expressed in cubic feet per minute (cfm). Finally, it should be noted that punctuation used alongside parentheses needs to take into account their context.


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Velocity and orientation effects on the 10-mm Dorr-Oliver cyclone Download PDF EPUB FB2

Velocity and orientation effects on the mm Dorr-Oliver cyclone [Unknown.] on *FREE* shipping on qualifying offers. Velocity and orientation effects on the mm Dorr-Oliver cyclone. Velocity and orientation effects on the mm Dorr-Oliver cyclone.

[Avondale, Md.]: U.S. Dept. of the Interior, Bureau of Mines, (OCoLC) Online version: Velocity and orientation effects on the mm Dorr-Oliver cyclone. [Avondale, Md.]: U.S. Dept. of the Interior, Bureau of Mines, (OCoLC) Material Type.

Velocity and orientation effects on the mm Dorr-Oliver cyclone / By Kenneth L. Williams, Robert J. Timko, Jon C. Volkwein and Andrew B.

Cecala. Abstract. Bibliography: p. Mode of access: Internet. Velocity and orientation effects on the mm Dorr–Oliver cyclone. Pittsburgh, PA: U.S.

Department of the Interior, Bureau of Mines; RI Colinet JF, Shirey GA, Kost J. Control of Respirable Quartz on Continuous Mining Sections.

Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines; Contract Report Number JCited by: 2. Cecala AB Volkwein JC Timko RJ Williams KL Velocity and orientation effects on the mm Dorr–Oliver cyclone Pittsburgh, PA U.S.

Department of the Interior, Bureau of Mines RI Colinet JF Shirey GA Kost J Control of Respirable Quartz on Continuous Mining Sections Pittsburgh, PA U.S. Department of the Interior, Bureau of Mines. (First received 2 Septemberin final form 5 October ) Abstract-The performance of the 10 mm Dorr-Oliver cyclone is known to suffer from bias associated with the dependence of its aspiration efficiency on the inlet orientation.

A new mufti-inlet cyclone sampler was developed to minimize such orientation by:   The structure of a tropical cyclone (TC) can be described by a number of parameters associated with the TC tangential winds.

Intensity, strength, and size are three such parameters documented by Holland and Merrill ().Intensity (i.e., the maximum sustained surface wind) is critically important because the wind-related damage of a TC is proportional to at least the square of the Cited by: 2.

Two identical mm hydrocyclone connected in series for improving particle separation efficiency is studied using two particulate samples. The operating variable effects, such as feed rate, split ratio and pressure drop through hydrocyclones on the separation efficiency, energy loss and outlet particle concentration are thoroughly by: The Dorr Oliver, SKC aluminium, CIP10 R, and IOM head (with polyurethane foam separator) samplers all reported lower respirable dust air concentrations than average with the ultrafine ARD.

The Bureau of Mines conducted a brief laboratory study on the mm-diam Dorr-Oliver nylon cyclone to investigate (1) whether high wind speed (> ft/min), or sampler inlet orientation with respect to wind direction, can introduce errors when sampling respirable dust, and (2) whether any such errors can be reduced by using an inlet shield.

GS Cyclone. The performance of the mm Dorr-Oliver Cyclone is reported to suffer from bias associated with the inlet orientation. The GS-3 Cyclone was developed by Gautam and Sreenath at West Virginia University to overcome this bias while remaining compatible with existing filter cassettes and holders used by U.S.

mining inspectors. recently (Feb ), in the USA, the Dorr-Oliver 10 mm nylon cyclone (Jacobsen and Lamonica, ; Lippman and Harris, ; Caplan et al, ) was the widely used sampler operated at Lpm across the entire US coal mining industry.

On the other hand, most of the European countries use the HD. similar to that of the Dorr-Oliver Cyclone but has three inlets compared to only one on the Dorr-Oliver. Th is multi-inlet feature eliminates orientation bias and sensitivity to wind velocity.

In addition, the conductive plastic construction eliminates static eff ects seen with the File Size: KB. Leeuwpan fine coal dense medium plant. of the Isolated mm Nylon Cyclone at Low Stream Velocity. in U.S. coal mines use a mm Dorr-Oliver cyclone as a particle preclassifier as both.

recently, Febin the USA, the Dorr-Oliver 10 mm nylon cyclone was the widely used sampler operated at L/min across the entire U.S.

coal mining industry [17–19]. On the other hand, most of the European countries (including UK) use the HD type cyclone [15,20–26]. The. There was slight evidence to suggest that the performance of the FSP 10 is affected by the direction of the inlet relative to the air flow, although this was not significant when most respirable dust concentrations were compared, possibly due to the variability of paired dust concentration by: 2.

Respirable aerosol samplers generally do not have problems with inlet effects because the particles being sampled have low enough inertia and settling velocity. However, Cecala et al.

[6] found that the mm nylon cyclone operated free-standing in a wind tunnel oversampled. To estimate the fall velocity, four light sheets are placed at different heights: scanner channel 1 (CH1) is the highest and scanner channel 4 (CH4) is the lowest.

The height difference between CH1 and CH4 is mm. At least two scanners must detect the same particle to estimate its fall velocity, and the sensing area size is cm by: 1. The best performance was obtained with a mm Dorr-Oliver hydrocyclone, resulting in a separation efficiency of 81%.

These experimental values agree with computational fluid dynamics (CFD) predictions that high levels of separation efficiencies for mammalian cells could be achieved with small-diameter hydrocyclones (Medronho et. Personal air samples were collected using suction pumps (Gillian Multi-flow Pump; Sensydine, Clearwater, FL) connected to Dorr-Oliver 10 mm nylon cyclones (MSA, Pittsburgh, PA).

Each sampling train was calibrated to a recommended flow rate of l/min using an airflow calibrator (DryCal DC-1SC near-frictionless piston calibrator; Bios Cited by:. velocity national institute airflow airborne cabs haul Post a Review You can write a book review and share your experiences.

Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new.SEN-DORR-OLIVER.

Grouped product items; Product Name Qty; Cyclone Calibration Jar (For Cyclone and Inhalable Dust Sampler Head) $ Dorr-Oliver Size Selection Cyclone. $ Replacement Grit Pot. $ Vortex Finder. $ Add to Cart. Add to Wish List Add to Compare.

Details.1/5.The velocity distribution of fluid flow over plate is given by: 2 y y2 3 u where, u is the velocity in m/s at distance ‘y’ meter above plate.

Determine the shear stress at y .