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  • Aerodynamic noise analysis of a portable pneumatic ...

    2017-9-1 · Changes of the geometric parameters of the fan can induce variations in the airflow field, thus modulating the resulting aerodynamic noise. This article describes how certain parameters influence the aerodynamic noise of a portable pneumatic extinguisher; the research object of this study was the 6MF-30 portable pneumatic extinguisher.

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  • Research on Laval Nozzle and Overall Simulation Analysis ...

    fluid dynamics (CFD) to simulate the Structural parameters of Laval nozzle-- pneumatic turbine and analyzed the gas flow and flow rate. The simulation results show that the airflow impinges on the turbine blades and then flows out to the surroundings. …

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  • Effects of Bleed Air Extraction on Thrust Levels of the ...

    2020-8-6 · Demonstrator will test a simple pneumatic blowing sys-tem to demonstrate FFC effectiveness. 5 The X-29 sys-tem will use a compressed air bottle to supply the high-pressure air and is limited to a total of 20 sec of op-eration. The HATP supported research on pneumatic FFC applications to an F/A-18, including various wind tunnel tests.

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  • Three-dimensional numerical inversion of pneumatic cross ...

    Both parameters were found to vary considerably from one monitoring interval to another, reflecting the nonuniform nature of pneumatic rock properties at ALRS. The geometric mean of these equivalent permeabili- ties exceeded by a factor of 50 that obtained earlier by Guzman et al. [1996] from single-hole pneumatic injection tests, on a

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  • Design and experiments of pneumatic roller type precision ...

    The influence of the other two parameters on the single seed qualified index presented a trend of first rising and then falling when one of the parameters was fixed. The results showed that there was no backflow in the positive pressure chamber, where the spacing of the air inlet was 144 mm, and the airflow velocity was relatively uniform at each hole of the seed suction hole.

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  • Comparative analysis of two kinds of pneumatic compact ...

    2017-8-7 · The purpose of this paper is to know airflow field and its distribution of pneumatic compact spinning systems. Complete compact spinning (CCS) and four-line rollers compact spinning (FRCS) are both two kinds of pneumatic compact spinning systems, which utilizes airflow in condensing equipment to condense fiber bundle and improve yarn properties.,The paper …

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  • Numerical simulation of pneumatic conveying ...

    In this paper, a mathematical model for the pneumatic transport of micron silica particles in the dust removal pipeline is established, and the gas-solid two-phase flow in the pipeline is numerically simulated. This paper is mainly based on the FLUENT fluid simulation module in ANSYS WORKBENCH to simulate the motion behavior of particles in the pipeline, and obtained the …

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  • Process Parameter Changes on Quality Attributes in Fluid ...

    2021-2-5 · All three parameters also influenced the growth profile over time. It was clear that changes to one of these parameters during processing had a corresponding impact on the particle size and/or moisture content of the in-process material as seen in Figure1.

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  • Respiration and heartbeat signal detection from airflow at ...

    2017-11-16 · We previously proposed an evaluation method for detecting both respiration and heartbeat signals from the airflow at the mouth (Kawaoka et al 201518th Int. Conf. on Solid-State Sensors, Actuators and Microsystems; Kawaoka et al 2015 IEEE Sensors; Kawaoka et al 2016 Technical Digest IEEE Micro Electro Mechanical Systems Conf.).In the current study, we …

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  • Modelling of the Parameters of Air-Flow in Pneumatic ...

    9. Dopierała H., Radom C., Swaczyna P., Zawadzki L.; Modelling of the Parameters of Air-Flow in Different Construction Designs of Pneumatic Nozzles for Linking Staple and Filament Yarns. Part I. Determining of the Volume Flow and Local Speeds of Air-Flow. FIBRES & TEXTILES in Eastern Europe, Vol. 19, No. 3 (86) 2011, pp. 30-36. 10.

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  • Sorting Mechanism and Airflow Simulation of Garbage ...

    In order to obtain flow rule and separation mechanism of garbage mixture particle in pneumatic separator, under the conditions of certain parameters and boundary, gas-solid two-phase flow mathematic model of garbage mixture particle was set up, FLUENT software was used to simulation and analyze the flow field of improved pneumatic separator, the separate track of particle in improved pneumatic …

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  • Pneumatic Regulation of Bi-Directional Fluid Flow in ...

    2018-12-10 · Pneumatic Regulation of Bi-Directional Fluid Flow in Microchannels Yue-Min Wan, Nan-Kuang Yao, Chichen Chen, Lung-Yu Hung, and Shin-Hwan Wang Microsystems Laboratory, ITRI, Hsinchu 310, Taiwan, [email protected] ABSTRACT This paper presents a modeling of airflow inside micro-tunnel for fluid pumping. By utilizing unidirectional air

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  • 9. EFFECTIVENESS OF PLASMA JET EFFECT ON BODIES IN

    2007-9-10 · Pneumatic tube SCXI PC 'Toshiba-420cdt' Fig.3. The experimental set up MAS is a wind tunnel of close type and continuous operation mode with a flexible nozzle. An aerodynamic part of WT is used to produce airflow with needed parameters (Mach number and temperature) and providing of balance’s and pressure distribution measurements. Control and ...

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  • SIMULATION OF GRAIN PILE SEPARATION IN VERTICAL

    The methodology and grain pile pneumatic separation parameters in the vertical pneumatic passage under the specified probabilistic characteristics of the... DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.

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  • Finite Element Analysis of Airflow Field for Vacuum ...

    In order to study the impact of the different structures in the air-suction seed metering device of no-tillage planter on seeding performance, based on the structural characteristics of vacuum chamber in air-suction seed metering device of no-tillage planter, the air flow finite element analysis of air-suction seed metering device and experimental verification were did.

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  • Stochastic Inversion of Pneumatic Cross-hole Tests and ...

    The distributions of permeability and porosity are key factors that control airflow and gas phase transport in unsaturated formations. To understand the behavior of flow and transport in such formations, characterization procedure is a typical approach that has been widely applied to laboratories and fields. As is recognized by most investigations, this approach relies on accurate …

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  • Linear pneumatic piston actuators - ABB

    2021-2-17 · Linear pneumatic piston actuators Measurement made easy Overview LP linear piston actuators are typically used to control the position of airflow regulating dampers, butterfly valves, and other similar process regulating devices on furnaces, boilers and air distribution systems. They are most often used on windbox dampers in NOx

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  • Pneumatic Conveying Systems - CED Engineering

    2020-10-19 · Pneumatic conveying can be used for particles ranging from fine powders to pellets and bulk densities of 16 to 3200 kg/m3 (1 to 200 lb/ft3). As a general rule, pneumatic conveying will work for particles up to 2 inches in diameter @ typical density. By 'typical density' we mean that a 2 inch particle of a polymer resin can be moved via pneumatic

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  • A new method for calculating the sonic conductance of ...

    2017-2-8 · Thus, a quantitative understanding of airflow through an orifice is required when designing or analysing a pneumatic system. The airflow rate through an orifice is a fundamental problem in fluid mechanics. It was originally solved by the effective area approach, 1 which was directly dependent on the discharge coefficient.

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  • The Parameters of Acoustic Emission Signal Proposed to ...

    Types of Pneumatic Valves. The poppet-type valve shown previously in Figure 1 is a type in which a flat sheet or cone-shaped valve body moves perpendicular to a valve seat. A spool-type valve moves a spool that precisely fits in a sleeve according to the axis, changes the flow inside the valve. Spool valves are mostly used on direction control ...

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  • Pneumatic Conveying Systems - CED Engineering

    The methodology and grain pile pneumatic separation parameters in the vertical pneumatic passage under the specified probabilistic characteristics of the... DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.

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