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In following of previous efforts, this paper discusses improving of mechanical properties of ST yarn by using double-nozzle jet. In the present work, at first, a Murata jet was attached to Repco ST yarn machine which the air pressure and distance of double-nozzle jet from twisting rollers were varied.
Get Price1999-10-20 · As a result, the spray structure formed by pre-filming airblast atomization may be significantly changed. An experimental investigation is carried out to study the effects of fuel nozzle displacement on the structure of a spray formed by a dual orifice …
Get Price2017-4-10 · The effect of nozzle travel rate on machining performance is investigated by the novel simulation and experiments to optimize the parameter. Abstract Jet electrochemical machining is a promising shaping method that has the potential to replace traditional sinking ECM in the industry owing to its flexibility and stability.
Get Price2012-5-17 · 27 January 2016 | The Aeronautical Journal, Vol. 118, No. 1209. Effects of area-ratio on the near-field flow characteristics and deflection of circular inclined coaxial jets. Experimental Thermal and Fluid Science, Vol. 54. Effect of a tab on the aerodynamical development and noise of an underexpanded supersonic jet.
Get Price2016-9-1 · The effect of different jet-to-target plate distances persist along the wall jet region. It is concluded, therefore, for larger wall to-jet spacing (over 28 jet nozzle width), the turbulence kinetic energy increases as the distance from the exit jet, y/e, is decreased, reaches a peak near the wall.
Get Price2018-6-27 · Reynolds-averaged Navier–Stokes (RANS) simulations of the double-beveled nozzles and a benchmark nonbeveled nozzle were performed at nozzle-pressure-ratios (NPR) between 2.8 and 5.0, and the results are observed to agree well with Schlieren visualizations obtained from a modified Z-type Schlieren system.
Get Price2010-2-1 · A drop forms as a result of the inertial pressure. This pressure equals to ρ v 2 2 in which, ρ is the density of liquid and v is velocity and balanced against the restraining pressure 2γ/r. γ is the surface tension and r is the radius of the deforming surface. By taking a ratio of these two pressures, Weber (We) number can be defined.
Get Price2021-4-13 · This study focuses on the effect of melt temperature on as-injection molded product, thereby high-density polyethylene samples were fabricated by performing three different melt temperatures (180, 190, and 200 °C), and subsequently, their mechanical, thermal, and morphological and surface quality properties were examined.
Get Price2021-8-28 · 3. General-Flow Analysis of a Nozzle: Assumptions: 1. The flow of the fluid is assumed to be one dimensional. 2. The change in area and curvature along the axis of the duct are gradual. 3. Thermodynamic and mechanical properties are uniform across planes normal to the axis of a duct. 4. The flow of the fluid is assumed to be steady flow.
Get Price2020-6-9 · The use of waterjet technology is now prevalent in medical applications including surgery, soft tissue resection, bone cutting, waterjet steerable needles, and wound debridement. The depth of the cut (DOC) of a waterjet in soft tissue is an important parameter that should be predicted in these applications. For instance, for waterjet-assisted surgery, selective cutting of tissue layers is a ...
Get Price2012-12-1 · The effects of the suspensions of Al 2 O 3 nanoparticles on the overall heat transfer performance for spray cooling using a solid jet nozzle were experimentally and theoretically studied at various flow rates and nanoparticle fractions. Based on a thermal probe embedded in the testing plate, the cooling curves, which represented the transient ...
Get Price2021-6-5 · if the jet first impinges on the narrow face, and splits, flowing upward toward the free surface, and downward, generating a stable “double-roll” flow pattern [1, 2]. The flow pattern depends on the nozzle geometry, casting speed, mold width, mold thickness, argon gas injection, submergence depth, and the application of electromagnetic ...
Get PriceA study of mechanical and tribological properties as well as wear performance of a multifunctional bilayer AlTiN PVD coating during the ultra-high-speed turning of 304 austenitic stainless steel Q. He, J.M. DePaiva, J. Kohlscheen, S.C. Veldhuis
Get Price2021-8-25 · In this research, the jet-flow characteristics under tank pressures of 2 ∼ 6 kgf/cm2 were studied to obtain basic data for an optimal design of the main nozzle in an air- jet loom.
Get PriceCover Image, Volume 138, Issue 36. Guoyan Wang, Shujian Gao, Jimin He, Zijuan An, Cuiying Shao, Yun Ding, Zhiming Jin. , 51267. First Published: 12 June 2021. The image created by Guoyan Wang and Jimin He shows the “Jet Flow” phenomenon when the UHMWPE melt is ejected from the nozzle, on the basis of which the novel non-dense injection ...
Get Price2012-5-2 · Effect of Rocket Engine Layouts on Jet Flowfield Inside a Launch Pad. ... Effect of Nozzle-Plate Distance on Acoustic Phenomena from Supersonic Impinging Jet. ... Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, Vol. 228, No. 14.
Get Price2017-3-8 · However, the effects of nozzle temperature (T), nozzle-bed distance (NBD), and their interactions on strut width (SW) have not been investigated. In the present work, a two-way factorial study with three levels of T and NBD in triplicates was undertaken.
Get Price2021-6-28 · The air jet is 1/2 the ID of the nozzle and as the air stream is passed through both, it creates a low pressure which sucks the media from the hopper into the air stream. The media acceleration distance is very short ( from the nozzle to the workpiece-approximately 4 to 14”).
Get PriceIn case of liquids with physical properties like water, a mixin g ratio of motive flow to suction flow is 1:3. On account of its velocity and of the dragging jet effect resultin g therefrom, the mixed flow leaving the liquid jet mixing nozzle carries forward so much …
Get Price2021-8-28 · 3. General-Flow Analysis of a Nozzle: Assumptions: 1. The flow of the fluid is assumed to be one dimensional. 2. The change in area and curvature along the axis of the duct are gradual. 3. Thermodynamic and mechanical properties are uniform across planes normal to the axis of a duct. 4. The flow of the fluid is assumed to be steady flow.
Get Price2021-6-5 · if the jet first impinges on the narrow face, and splits, flowing upward toward the free surface, and downward, generating a stable “double-roll” flow pattern [1, 2]. The flow pattern depends on the nozzle geometry, casting speed, mold width, mold thickness, argon gas injection, submergence depth, and the application of electromagnetic ...
Get PriceThe results revealed that casting using EMS with different directions of magnetic field in the mold and the nozzle has the best effect on the distribution of the fluid flow and minimal influence on the stability of the meniscus and yields the minimum metal-jet penetration into the mold. Key words: Continuous casting, Submerged nozzle ...
Get Price2021-3-2 · Finally, the effects of nozzle trailing shape on screech radiation are also investigated through acoustic measurements at an under-expanded condition of NPR=5. Bevelled nozzles eliminate jet screech by producing asymmetric shock structures which results in instability waves within the jet column, as well as mismatches in phase and amplitude.
Get Price2021-6-28 · The air jet is 1/2 the ID of the nozzle and as the air stream is passed through both, it creates a low pressure which sucks the media from the hopper into the air stream. The media acceleration distance is very short ( from the nozzle to the workpiece-approximately 4 to 14”).
Get Price2020-1-27 · Microstructural and ablative properties of graphite nozzles with SiC coating deposited by CVD technique. ... Figure 4 shows the weight loss of graphite-based nozzle without SiC coating exposed to the plasma jet during 10, 20 and 70 s. Within 10 s of exposure, samples showed a weight loss of 0.21% and no increase in throat diameter ...
Get Price2020-8-6 · The walls of the combustion chamber and nozzle of a liquid rocket engine must not be heated to temperatures that endanger the structural integrity of the chamber or nozzle. Several methods exist for cooling the walls so that the temperature is maintained at a safe level: Regenerative cooling- One or both propellants are circulated as coolants ...
Get Price2020-1-7 · with the property of converting mechanical energy to electrical energy (direct piezoelectric effect) and electrical energy to mechanical energy (indirect piezoelectric effect). Due to this unique property, piezoelectric material is widely used in engineering and medical fields (Vijaya 2016). Pressure sensors (Yang et al. 2018), ultrasonic
Get Price2011-7-29 · 2 105 carbon atoms. The average distance between each carbon atom is 1.26 10 10m.Using this distance and the number of atoms in the chain takes to a length of 25 10 6m and 4–6 10 10m width for a stretched chain. The statistical forming of the macromolecular structure of plastics results in the
Get PriceBased on airfoil curves that can effectively balance the rectification and drag reduction effects in flight hydrodynamics, we designed an internal streamline structure of jet nozzle for coalbed methane (CBM) mining. The three types of nozzles originating from three typical airfoil curves are compared with the conical nozzle. Results showed that the thin-type streamlined nozzle had the largest ...
Get Price2020-10-29 · As the application of the direct printing method becomes diversified, printing on substrates with non-flat surfaces is increasingly required. However, printing on three-dimensional surfaces ...
Get Price2012-4-30 · Overexpansion Effects on Characteristics of Mach Waves from a Supersonic Cold Jet. ... Flow Characteristics of Double-Venturi Abrasive Blasting Nozzle. The Korean Society of Manufacturing Process Engineers, Vol. 17, No. 2 ... Mechanical Engineering Reviews, Vol. 3, No. 1.
Get PriceCover Image, Volume 138, Issue 36. Guoyan Wang, Shujian Gao, Jimin He, Zijuan An, Cuiying Shao, Yun Ding, Zhiming Jin. , 51267. First Published: 12 June 2021. The image created by Guoyan Wang and Jimin He shows the “Jet Flow” phenomenon when the UHMWPE melt is ejected from the nozzle, on the basis of which the novel non-dense injection ...
Get Price2021-2-27 · Effect of Nozzle Initial and Exit Wall Angles on Supersonic Flow Field in a Thrust Optimized Nozzle Journal of the Korean Society of Propulsion Engineers, Vol. 25, No. 3 Rocket nozzles: 75 years of research and development
Get Price2021-8-2 · The purpose of this work is to determine, based on the computational model, whether a mixture of a binary liquid is capable of producing longer, thinner and faster gas-focused micro-jets, compared to the mono-constituent liquids of its components. Mixtures of water with two different alcohols, water + ethanol and water + 2-propanol, are considered. The numerical study of pre-mixed liquids is ...
Get Price2020-1-7 · with the property of converting mechanical energy to electrical energy (direct piezoelectric effect) and electrical energy to mechanical energy (indirect piezoelectric effect). Due to this unique property, piezoelectric material is widely used in engineering and medical fields (Vijaya 2016). Pressure sensors (Yang et al. 2018), ultrasonic
Get PriceThe jet dispersion is defined by the increase of the jet diameter with distance from the nozzle. Included in the definition of the jet diameter is the air water mixture surrounding the core of the ...
Get PriceTo analyze the deflector-jet servo valve’s internal flow characteristics, a theoretical model of the complicated flow distribution in the deflector plate is established based on the offset jet attachment theory. When the deflector plate offsets, jet attachment parameters are attained to figure out the jet’s bending and colliding process. On this basis, an analytical method of acquiring the ...
Get Price2017-10-23 · for the mill, and the properties (such as size and shape) of the finished product. Fully characterizing the feed material is essential to identifying the right mill for the job. This article gives a detailed description of hammer mill and jet mill operation, and describes how to characterize the feed material and control product particle size.
Get PriceIn case of liquids with physical properties like water, a mixin g ratio of motive flow to suction flow is 1:3. On account of its velocity and of the dragging jet effect resultin g therefrom, the mixed flow leaving the liquid jet mixing nozzle carries forward so much …
Get Price2019-12-4 · Kiran et al investigated the effect of Al 2 O 3, TiO 2, alone and in combination with SiC, on the mechanical properties of glass fiber reinforced epoxy composites. The maximum values of tensile, flexural and impact strength were recorded for Al 2 O 3 and SiC added glass fiber composites.
Get Price2008-2-6 · However, the effects of these biomanufacturing processes on cells have not been fully studied. This paper examines the effect of solid freeform fabrication–based direct cell writing process, focusing on dispensing pressure and nozzle size, on the viability and functional behavior of …
Get PriceThe nozzles of moist-mix shotcrete are the key parts of forming a steady jet flow field and ensuring the uniform mixing of water and other ingredients. In this paper, for optimizing the nozzle of moist-mix shotcrete, both the internal and external field of a variety of spray nozzles were simulated and analyzed by adopting orthogonal test method with Fluent simulation software combined.
Get Price2020-12-22 · Nanofluid spray/jet impingement cooling is widespread and finds applications in many scientific and industrial paradigms. Because of these ubiquities of nanofluid spray/jet impingement cooling, this branch of fluid dynamics has attracted great attention from the scientific community.
Get Price2016-10-28 · The influence of liquid fuel properties on atomisation remains an open question. The droplet sizes in sprays from atomisers operated with different fuels may be modified despite the small changes of the liquid properties. This paper examines experimentally the development of a liquid jet …
Get Price2017-9-20 · We observe that the jet is faster and stretches more to breakup into multiple droplets than the jetting without breakup case. The jet presented in Fig. 2a reaches 430.4 lm in 1.82 ls, while the jet in Fig. 2b reaches only 52 lm in 14.54 ls. Multiple-drop breakup and jetting without breakup cases for XG solutions are presented in Fig. 3a, b ...
Get Price2015-10-26 · in order to evaluate the effect of pulse duration. Masuda et al. (1994) observed that the duration of the jet, as well as the num-ber of jet pulses used are both known to affect removal rates. All of our experiments, however, used a single jet burst; we did not observe a strong effect due to varying the jet duration from 25 to 100 ms (Figure 2).
Get Price2020-8-17 · Jet pumps are centrifugal pumps with an ejector (venturi nozzle) attached at the discharge outlet. They function based upon the Venturi effect of Bernoulli's principle - utilizing constriction to reduce pressure and provide suction. After the pump is primed, a motive fluid is pumped through a standard centrifugal pump and enters an ejector.
Get Price2018-8-11 · 1 Estimating column diameters in jet grouting processes Kimpritis, T.1, Standing, J.R.2 and Thurner, R.3 1 Keller Hellas S.A., formerly Imperial College London 2 Department of Civil and Environmental Engineering, Imperial College London 3 Keller Grundbau GmbH, Technical and Commercial Director Middle East and Turkey Abstract Jet grouting is widely used in geotechnical …
Get PriceJet pumps represent another type of special effect pump. Figure 2.10 shows an annular nozzle jet pump in which a small stream of a high pressure fluid (motive fluid) is used to move a large volume of the pumped fluid. The jet pump has no moving parts and the pumping process
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