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  • (PDF) Effect of Nozzle Geometry on Air-Jet Texturing ...

    '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 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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  • (PDF) The effect of nozzle geometry on the flow ...

    Effect of nozzle geometry on pressure drop and heat transfer in submerged jet arrays ... Download Free PDF. ... Influence of the shape of the nozzle on local heat transfer distribution between smooth flat surface and impinging air jet. By Vadiraj Katti. Single-Phase Microscale Jet …

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  • (PDF) Effect of nozzle geometry on pressure drop and

    2018-8-29 · geometry ( modified nozzle geometry). Blends like B20, B40, B60, B80, B100 and standard diesel were used in engine and studied the performance and emission characteristics without altering the compression ratio of the engine. The experimental results showed that higher Brake thermal efficiency (BTE) for baseline nozzle geometry up to B40 POME ...

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  • Effect of nozzle geometry on the performance and

    23rdNational Conference on I. C. Engine and Combustion (NCICEC 2013) SVNIT, Surat, India 13-16, December 2013 Effect of Nozzle Geometry on Flame Characteristics of a Swirl Stabilized Hydrogen Combustor D. P. Mishra and R. Khatry Department of Aerospace Engineering Indian Institute of Technology Kanpur Abstract This paper presents an experimental study on the performance …

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  • (PDF) Effect of Nozzle Geometry on Flame

    2020-1-22 · nozzle geometry with 5 hole having an orifice diameter of 0.3 mm. That may be due to atomization, spray characteristics and mixing with air were better, resulting in improved combustion. The BTE was found to be 28.5% at 80% load and its maximum value obtained with 5 hole nozzle at an injection opening pressure of 205 bar.

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  • A Review on Effect of Nozzle Hole Geometry on the ...

    2016-6-21 · The effect of nozzle diameter on heat transfer coefficient is investigated (Jacob, et al, 2013). Submerged air jet is used to investigate the fluid flow and heat transfer characteristics with a circular jet (Anwarullah et al, 2012) and they observed that Nusselt number increases with decrease in nozzle to plate spacing. The effect of flat plate ...

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  • Effect of Air Ratio on Unsteady Partially Premixed Flames

    2020-1-8 · Effect of Air Ratio on Unsteady Partially Premixed Flames Ashokraj R, Sundararajan T, Srinivasan K Indian Institute of Technology, Madras Chennai, Tamil Nadu, India [email protected]; [email protected]; [email protected] Abstract– The burning characteristics of unsteady partially premixed flames have been investigated in this paper.

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  • Study on Heat Transfer during Rectangular Slot Air Jet ...

    2017-4-25 · Finally, the pressurized air goes through the rectangular slot nozzle and generates the slot jet. The flow rates were measured directly from the rotameter. Two dimensional slot nozzle with 3 mm width and an aspect ratio of 21:1 to produce uniform velocity profile at its exit is used for the study. According to the hydraulic diameter of the ...

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  • Flow Investigation of an Axisymmetric Single and Multi Jets

    2018-1-23 · d for various nozzle exit angles and the structure of jet plumes is studied. 4. M. ODEL . D. ESIGN. The material used for nozzle is steel. The air at ideal gas is used for flow analysis. A cylindrical domain is created to capture the jet plumes structure with location and interference of shock wave (or expansion waves).

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  • EFFECT OF COLLAR AND BEVEL ANGLE IN MIXING

    19. P.A.Harari, J.S.Patil, “A Review on Effect of Nozzle Hole Geometry on the Performance, Combustion and Emission Parameters of CI Engine Fuelled with Diesel and Biodiesel”, International Journal of Engineering and Management Research, 2016, 6(3), 39-48. 20.

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  • Nozzle Wear Parameter in Water jet machining The Review

    2021-6-9 · jet with nozzle pressure ratio variation of 4.5 to 7.5 with step size of one. The results are also compared with flat collar (zero bevel angle) in order to see the effect of bevel exit inclination on jet mixing. 2. METHODOLOGY AND PROCEDURES The two-dimensional numerical studies are conducted and the results obtained are compared

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  • Effect of Jet Shape on Flow and Torque Characteristics of ...

    2014-4-1 · A nozzle is required to perform abrasive waterjet machining for material removal with the help of very high velocity of waterjet. The main problem of AWJ machining process is nozzle wear during the process. The wear depends on various parameters such as water jet characteristics, nozzle geometry…

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  • CHARACTERISTIC STUDY OF NON-CIRCULAR

    2015-1-31 · penstock. The shape of jet affects the force and torque on the bucket and runner of turbine. The nozzle of circular cross section is commonly used. In this paper attempt has been made to study the effect of four different jet shapes on the flow and torque characteristics of Pelton turbine runner through numerical simulation.

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  • Experimental Analysis of Temperature Distribution Along

    2011-10-13 · In a turbulent jet flow, it is customary to use an axisymmetric nozzle, as reported in [11, 14, 26] to mention only a few. The conventional axisymmetric nozzles consist of a smooth circular pipe or a contracted circular nozzle, which are characterized by fully developed velocity profiles, and top-hat velocity profiles, respectively.

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  • Heat transfer enhancement by jet impingement on

    2012-5-17 · Effect of axisymmetric sonic nozzle geometry on characteristics of supersonic air jet Journal of Thermal Science, Vol. 13, No. 2 An experimental study of underexpanded sonic, coaxial, swirl jets

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  • Mathematical Model of a Constructal Coanda Effect Nozzle

    2014-12-16 · jet impingement is to incident the high velocity air jet coming from the nozzle on a target surface having dimples of various geometry. It is used for cooling, heating and drying purposes like in hot metal cooling, turbine blades cooling and in cooling electronics equipments etc. This study will investigate the effect of jet

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  • STUDY OF DECAY CHARACTERISTICS OF RECTANGULAR

    2017-9-18 · tially huge impact on the field of air transport. The concept comprises a thrust vectoring propulsive nozzle named HOMER (High-speed Orienting Momentum with Enhanced Reversibility), exploit-ing Coanda effect of a dual stream on a curved, convex surface, and a plasma actuator enabling the extension of the vectoring angle range of the nozzle.

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  • Review of Correlations on Jet Impingement Cooling

    2018-12-6 · The nozzle exit geometry factors like hydraulic diameter (D h) and shape factor ( ζ) were governed by exit geometry shape. The aspect ratio of characteristic major to mi-nor dimensions was 2:1 for rectangular and elliptical shaped nozzles. The nozzle exit geometry shapes are shown in fig. 3.

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  • Ansys Nozzle Jet - cdn.app.jackwills.com

    2020-4-1 · other arrangements are nozzle geometry of square edge (no chamfered) and with chamfered edge, inclined jet, axially symmetric air jet, elliptic jet arrays. Swirling Jet the impinging jet is forced to swirl when exiting the jet orifice/nozzle, providing a flow commonly known as the swirling jet.

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  • DECAY OF SUPERSONIC RECTANGULAR JET ISSUING

    2021-8-3 · nozzle geometry and size nozzle configuration location of exhaust ports nozzle to target spacing surface motion and operating variables such as cross flow and jet axis velocity complicate the analysis Experimental and Numerical Computational Fluid Dynamics April 29th, 2019 - consists of the nozzle with spear and jet 14 The jet is designed in ...

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  • Effect of linear density of feed yarn filaments and air ...

    2020-9-9 · This paper addresses the effect of expansion ramps on the decay characteristics of a controlled supersonic rectangular jet. A Mach 1.8 rectangular jet issuing from a converging-diverging nozzle of aspect ratio 2 and Reynolds number 1.861∙105 is considered as the base model for the study. Two separate nozzle models with ex-

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  • Numerical Investigation of Heat and Flow Characteristic

    2016-7-20 · Department of Textile Technology, Indian Institute of Technology, New Delhi 110 016, India Received 7 August 2014; revised received and accepted 22 September 2014 The influence of yarn feed and process parameters used in the production of air-jet textured yarn on compression and recovery behavior of air-jet textured yarn fabric has been studied.

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  • EXPERIMENTAL AND STATISTICAL ANALYSIS ON THE

    2018-3-11 · complexity of mechanism of heat removal. The study of air jet impingement system has various parameters which effect the cooling process. These parameters are jet Reynolds number, mass flow rate of the air, air temperature, jet exit cross sectional area, number of jet used in a system, and jet …

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  • Numerical Investigation of Multijet Air Impingement on

    2018-9-20 · The present Paper aims to present a comparative study of the external and internal flow characteristics through an axisymmetric circular convergent nozzle, a nonserpentine convergent nozzle with an elliptic exit, and a shallow single serpentine convergent nozzle with an elliptic exit under the fully expanded condition at a nozzle pressure ratio of 1.6.

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  • Ansys Nozzle Jet - cdn.app.jackwills.com

    2013-9-8 · The air flow rate, pin fin height, the diameter of the jet and pin fin, and jet to target surface distance are the main variables, which can be chosen to solve a given heat and mass transfer problem. Reynolds number is varied in turbulent range to study the effect of Re on heat transfer coefficient. Jet exit area for each geometry of nozzle ...

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  • NUMERICAL AND EXPERIMENTAL INVETIGATIONS OF

    2021-8-3 · nozzle geometry and size nozzle configuration location of exhaust ports nozzle to target spacing surface motion and operating variables such as cross flow and jet axis velocity complicate the analysis Experimental and Numerical Computational Fluid Dynamics April 29th, 2019 - consists of the nozzle with spear and jet 14 The jet is designed in ...

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  • STUDY OF DECAY CHARACTERISTICS OF RECTANGULAR

    2016-3-1 · Based upon the computed results, the nozzle geometry has significant influences on the discharge coefficient, profile of sonic lines and on the nozzle downstream flow features. Jet boundaries, shear layers and lengths of supersonic core of jets were investigated to clarify the performance of nozzles on the downstream flows. 2.

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  • I ESTIMATION OF AFTERBODY DRAG WITH JET

    2020-12-1 · College of Engineering, Trivandrum Thiruvananthapuram, Kerala,695016 India VSSC, ISRO, Thiruvananthapuram,Kerala,695022 India ABSTRACT Effective mixing of two supersonic streams in a short mixing chamber is a major challenge. Active and passive methods are used to enhance the mixing. Nozzle geometry, different nozzle configurations a

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  • Jet Impingement Heat Transfer: Physics, Correlations, and ...

    2018-12-6 · The nozzle exit geometry factors like hydraulic diameter (D h) and shape factor ( ζ) were governed by exit geometry shape. The aspect ratio of characteristic major to mi-nor dimensions was 2:1 for rectangular and elliptical shaped nozzles. The nozzle exit geometry shapes are shown in fig. 3.

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  • Heat Transfer Enhancement by Jet Impingement ... - IRD

    2016-4-1 · incident the high velocity air jet coming from the nozzle on a target surface having dimples of various geometry. It is used for cooling, heating and drying purposes like in hot metal cooling, turbine blades cooling and in cooling electronics equipments etc. This study will investigate the effect of jet impingement on a

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  • Some Studies on Abrasive Jet Machining - nitrkl.ac.in

    2010-4-12 · The compressed air from the compressor enters the mixing chamber partly prefilled with fine grain abrasive particles. The vortex motion of the air created in the mixing chamber carries the abrasive particles to the nozzle through which it is directed on to the workpiece. The nozzle and the workpiece are enclosed in a working

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  • Modelling and Exhaust Nozzle Flow Simulations in A

    2020-4-1 · Supersonic flow from a nozzle that represents the exhaust nozzle of a supersonic combustion ramjet SCRAMJET is modelled. Jet from the nozzle is issued into a domain which is bounded on one side by an after body wall which is parallel to the centreline of the nozzle. Shocks propagating from the nozzle exit reflect from the after body.

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  • Effect of Shocks on Mixing and Thrust in Over-expanded

    2013-6-3 · Effect of Shocks on Mixing and Thrust in Over-expanded Nozzles Swapneel Roy1, Thanusha M.T2, Rahul B.V3, A.A. Khan4 1, 2, 3 Aeronautical Society of India, 13 -B, Indraprastha Estate, New Delhi, India 4 Propulsion Division, CSIR - National Aerospace Laboratories, Bangalore. India

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  • Numerical Investigation of Heat and Flow Characteristic

    2018-3-11 · complexity of mechanism of heat removal. The study of air jet impingement system has various parameters which effect the cooling process. These parameters are jet Reynolds number, mass flow rate of the air, air temperature, jet exit cross sectional area, number of jet used in a system, and jet …

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  • Effect of linear density of feed yarn filaments and air ...

    2016-7-20 · Department of Textile Technology, Indian Institute of Technology, New Delhi 110 016, India Received 7 August 2014; revised received and accepted 22 September 2014 The influence of yarn feed and process parameters used in the production of air-jet textured yarn on compression and recovery behavior of air-jet textured yarn fabric has been studied.

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  • Effect of Air Swirler Profile on Spray Characteristics

    2019-6-4 · Effect of Air Swirler Profile on Spray Characteristics Shraddha Sharma, Srikrishna Sahu, Thirumalachari Sundararajan 1Indian Institute of Technology, Madras Chennai, TamilNadu, India [email protected] Abstract - Pressure swirl atomizers are widely used in gas turbines and liquid propellant rockets to obtain improved atomization. In

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  • IJRMET Vo l . 6, Issu E 1, N 2015-A 2016 Design ...

    2016-1-30 · The characteristics of the circular jet like total pressure decay, shock cell structure, jet spreading rate and mixing rate are studied. The present work concentrates on effect of nozzle geometry and co-flow supersonic jets. The flow fields are quantified by pitot pressures and are visualized by Shadowgraph method. II. Design of Coaxial Jet

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  • MICRO MACHINING PROCESSES - IIT Kanpur

    2016-2-4 · Flaring of the Jet Cavity dimension changes with a change in NTD. Abrasive particles repeatedly hit on the work surface. Brittle fracture separates out tiny particles (wear particles) to produce a cavity. Cavity width ≥ Nozzle inner diam. (Depends on NTD). Cavity Depth depends on work piece feed rate, abrasive particle mass (or density) and pressure (or velocity of the jet).

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  • Critical Effect of Rotor Vanes with Different Injection ...

    2015-1-8 · Critical Effect of Rotor Vanes with Different Injection Angles on Performance of a Vaned Type Novel Air Turbine Bharat Raj Singh1* and Onkar Singh2 1*Professor and Head of Department - Mechanical Engineering, Associate Director, SMS Institute of Technology, Lucknow-227125, Uttar-Pradesh, India

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