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  • Effect of Nozzle Geometry on Air-Jet Texturing Performance

    2020-4-22 · The air-jet texturing process is widely known for its ability to produce spun-like synthetic continuous filament yarns. Structural modification is achieved by contact of the continuous feed yarn with a supersonic air stream delivered by a nozzle. The details of the flow patterns are influenced by the geometry of the nozzle. This

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  • Effect of Geometry on the Performance of Intermingling

    'Effect of Nozzle Geometry on the Flow Charact eris tics of Small W ater Jets', Proceedings of the Institution of Mechanical Engineers, Part C, Journal of M echanical Engineering Science, Vol. 220 ...

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  • EFFECT OF NOZZLE GEOMETRY ON THE EFFICIENCY OF

    2018-2-17 · In order to facilitate the research, an air-jet texturing nozzle with a rectangular cross section has been developed. The texturing performance of the nozzles is assessed by means of process observations and on-line measurement of stabilizing zone tension, and also by measuring the in creased linear density of the yams on textured yarn samples.

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  • An Investigation of the Inuence of Nozzle Aspect Ratio on ...

    2018-2-17 · This paper systematically investigates the effect of a number of geometric parameters on the texturing performance of air-jet texturing nozzles. In order to facilitate the research, an air-jet text...

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  • An Investigation of the Inuence of Nozzle Aspect Ratio on ...

    2009-8-24 · Whelan, BP, & Robinson, AJ. 'The Effect of Nozzle Geometry on Pressure Drop and Heat Transfer to Free Surface Liquid Jet Arrays.' Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference.

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  • Effect of Air-Jet Texturing on Adhesion Behaviour of ...

    For each of these properties, the most efficient nozzle was the one for which the mass flow rate of compressed air was the lowest. All nozzles showed comparable mass flow rates for the same impact force and the difference was in the order of 5% better than a straight pipe geometry. Only the energy saving nozzle used around 10% less mass flow ...

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  • ABSTRACT Begenir, Asli. The Role of Orifice Design in ...

    2012-5-17 · American Institute of Aeronautics and Astronautics 12700 Sunrise Valley Drive, Suite 200 Reston, VA 20191-5807 703.264.7500

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  • Role of Nozzles with Air Holes in Air Entrainment by a ...

    2021-7-25 · AIR ENTRAINMENT BY A WATER JET 789 Experimental Program The water jet velocity, V j, at the nozzle exit was varied from 2.5 to 15 m/s. The water jet length, L j, from the nozzle outlet to the plunging point of a water jet on the water surface of the tank, was 0.30 m.

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  • Experimental and Numerical Investigation of a Pressure ...

    2017-3-15 · peaks which occurs at water-air interface. The time history of the measured aircore diameter at mid-nozzle is given in Figure 6a. The mean air core diameter at the measurement location is evaluated as 1.08 mm which is 0.07 mm smaller than the measurement of Dash et.al.[14]. The mean aircore diameter at the exit of the atomizer is evaluated as 1 ...

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  • ADVANCES in FLUID MECHANICS - WSEAS

    2012-9-20 · Istanbul, Turkey August 21-23, 2012 ISSN: 2227-4596 ... Experiment and Performance Prediction of Bubble-Jet Type Air-Lift Pump for Dredging Sediments on Sea and Lake Beads 27 ... Performance Study of Nozzle Geometry on Heat Transfer Characteristics - Part I: Local Heat Transfer 42

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  • Effects of design parameters on a multi jet impinging heat ...

    2018-12-17 · that, jet-to-plate distance, Reynolds number and jet-to-jet dis-tance was the dominant operating parameters in multi jet impingement application. Caliskan et al. [8] performed numer-ical and experimental analyses, in order to show the effect of jet geometry …

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  • Experimental Study of Direct Contact Condensation of

    2015-7-20 · Effect of water spray on air humidity ratio (75°C-80 % RH – Counter Flow) In the meantime, relative humidity starts to increase and it reaches saturation point (%100 RH) represented in Figure 4. If air cooled below the dew point, water vapor starts to condensed as droplets. Figure 5 represents the effect of water injection on

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  • NUMERICAL INVESTIGATION OF COMBINED EFFECT OF

    2014-6-19 · Suction head, driving air pressure and the percentage of the distance between throat section and nozzle are recorded. The effect of each parameter on the pump performance is investigated, in order to have a better understanding about the behavior of such pump under various conditions. A simple geometry jet pump was designed, developed and tested.

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  • Estimating column diameters in jet grouting processes

    2019-10-13 · Lin et al. [4] experimentally investigated heat transfer in confined air jets. The effects of Reynolds number and jet-target plate spacing on heat transfer were studied in this study. As a result of local and average Nusselt numbers at the stagnation point, it has been found that effect of the change in jet …

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  • ADVANCES in FLUID MECHANICS - WSEAS

    2012-9-20 · Istanbul, Turkey August 21-23, 2012 ISSN: 2227-4596 ... Experiment and Performance Prediction of Bubble-Jet Type Air-Lift Pump for Dredging Sediments on Sea and Lake Beads 27 ... Performance Study of Nozzle Geometry on Heat Transfer Characteristics - Part I: Local Heat Transfer 42

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  • FLUID FLOW AND HEAT TRANSFER OF AN IMPINGING

    2007-10-31 · Convective heat transfer to an impinging air jet is known to yield high local and area averaged heat transfer coe–cients. The current research is concerned with the mea-surement of heat transfer to an impinging air jet over a wide range of test parameters. These include Reynolds Numbers, Re, from 10000 to 30000, nozzle to impingement

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  • Effect of Nozzle Length on Breakup Length of Liquid Jet ...

    Furthermore, one has to point out that the stability of jets may be influenced by the turbulence in the nozzle and the velocity profile. This work presents the experimental result about the effect of the nozzle length on the breakup length of liquid jets in the air and in the immiscible liquid, as the beginning of a systematic investigation of the influence by these factors on the breakup of jet.

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  • Investigation into the effect of nozzle shape on the ...

    2010-8-25 · High velocity impinging air jets are commonly used for heating, cooling and drying, etc. because of the high heat and mass transfer coefficients which are developed in the impingement region. In order to provide data for the designers of industrial equipment, a variety of slot nozzles were tested to determine the effect on heat transfer of both nozzle shape and slot width. A large multi-nozzle ...

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  • NOZZLES - UPM

    2021-1-2 · The classical quasi-one-dimensional Laval nozzle, which has a slender geometry, with a rapidly converging short entrance, a rounded throat, and a long conical exhaust of some 15º half-cone angle (the loss of thrust due to jet divergence is about 1.7%).

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  • Experimental Study of Air-Lift Pumps Characteristics

    2015-2-2 · the percentage of the distance between throat section and nozzle and the driving air pressure, suction head and also study the effect of each parameter on the air lift pump characteristics in order to have a better performance of such pump under various conditions. A certain geometry for air-lift pump designed and manufactured.

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  • Multiparameter Optimization of Thrust Vector Control

    2021-7-19 · and main flow to 5.4% at high-pressure ratios (injection of a hydrogen jet into the air flow). The width of the slotted nozzle varies from 0.1 to 0.5 mm, which at a fixed pressure ratio leads to a change in the length of the recirculation zone and the depth of penetration of the jet into the supersonic flow in a close to linear relationship ...

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  • Experimental Study of Direct Contact Condensation of

    2015-7-20 · Effect of water spray on air humidity ratio (75°C-80 % RH – Counter Flow) In the meantime, relative humidity starts to increase and it reaches saturation point (%100 RH) represented in Figure 4. If air cooled below the dew point, water vapor starts to condensed as droplets. Figure 5 represents the effect of water injection on

    Get Price
  • A review on nozzle wear in abrasive water jet machining ...

    2017-6-2 · A review on nozzle wear in abrasive water jet machining application H. Syazwani1, G. Mebrahitom, A. Azmir 1Faculty of Manufacturing Engineering, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia . E-mail :[email protected], [email protected], [email protected] . Abstract.This paper discusses a review on nozzle wear in abrasive water jet …

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  • OPTIMIZATION OF A HIGH-EFFICIENCY JET EJECTOR BY ...

    2021-5-13 · A number of researchers made an effort to understand the effect of jet ejector geometry on jet ejector performance. For example, Kroll (1947) investigated the effect of convergence, divergence, length, and diameter of the throat section, nozzle position, induced fluid entrance, and motive velocity. Croft and Lilley (1976) investigated the

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  • 3 rd International Conference Innovation and Modelling

    2020-8-26 · nozzle Figure 1. Schematic view of air-jet weft insertion system [1] Current state of the art air-jet weaving machines employ a tandem and main nozzle combination at the purpose to provide the initial acceleration to the weft yarn, and a series of relay nozzles along the reed channel to keep constant yarn velocity of about 55 – 80 m/s.

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  • Various Nozzle Designs Eff ect on the Polyproplene (PP ...

    2016-11-29 · plasma jet treatment induces 26o contact angle reduction using with N2 type nozzle with constant parameters. Maximum contact angle reduction obtained with the N1 type plasma nozzle. N3 type nozzle effect on surface contact angle value is between them. This change in water contact angle may be as a result of thermal oxidation caused to

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  • Inclined slot jet impinging on a moving wall

    2016-7-4 · the stagnation point location of orthogonal jet impinging an immobile wall 2 Problem Statement 2. 1 Geometry of problem The geometry and boundary condition are summarized in figure (1). The flow is steady in average and fully turbulent. The fluid (air) is incompressible with constant thermo-physical properties. The jet exit velocity is V j

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  • Optimization of Fuel Inlet Port Geometry of an Air ...

    2019-3-23 · ao Tuccar G, Uludamar E, Aydın K (2016) Optimization of Fuel Inlet Port Geometry of an Air Assisted Diesel Injector. Adv Automob Eng 5: 158. doi: 10.4172/2167-7670.1000158 Page 3 of 3 oe e 2 oo gg a oe ae oa 2 obtained at the exit orifice of the injector. Maximum injection velocity

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  • EXPERIMENTAL STUDY OF HEAT TRANSFER FROM

    2009-6-9 · Goldstein and al. 1986 and Narayanan and al. 2004]. In internal vane cooling, cool air pass through an impingement channel perforated with multiple holes and then multiple jets impinge on the internal side of the vane (see Fig.1). In the present study, the geometry is a single jet …

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  • Ultrafine Particle Generation at High Liquid Flow Rates ...

    2018-6-9 · interchangeable air and liquid caps on the nozzle body. The two SSC nozzle configu- rations used the same air cap, but the second configuration (SSC-2) was fitted with a smaller liquid orifice to investigate the effect of nozzle diameter on droplet size. The characteristics of …

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  • Head Loss Estimation of Water Jets from Flip Bucket of ...

    2021-7-6 · Fig. 3 Effect of air resistance on jet trajectory. [7] It is observed that the effect of air resistance is small whenever V j is less than about 20 m/s, but the throw distance is reduced by about 30% when the velocity is close to 40 m/s. 2.3 Head Loss The main purpose of the ski jump is moving

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  • Water Jet Guided Laser vs. Conventional Laser ...

    2019-3-18 · Influence the Nozzle Shape on Local Heat - Read online for free. Heat transfer analysis

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  • Effect of cryogenic cooling in milling process of AISI 304 ...

    2021-4-9 · terials. Water jet guided laser is a technology that overcomes most of these issues, where pressurized water in the process provides focusing, cooling and cleaning on the cut region, eliminating undesired side effects of the laser. In this study, cutting performanceof a water jet guided laser system and a s conventional laser system were compared.

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