Impinging of axisymmetric developing jets

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August undefined, 2024

Witryna1. Introduction In cutting or chipping processes a robust liquid cooling system is crucial for maintaining the cutting tools and workpieces in the temperature limits. The current type of cooling is an impinging jet cooling, which is a very effective cooling technique with high rates of local heat transfer. Witryna4 lip 2014 · A numerical investigation to determine the thermal characteristics of an unsubmerged axisymmetric oil jet impinging in a confined space on a stationary disc with uniform heat flux has been undertaken.

Analysis of the factors influencing the airflow behavior in an ...

WitrynaAn experimental and numerical study of impinging, incompressible, axisymmetric, laminar jets is described, where the jet axis of symmetry is aligned normal to the wall. … Witryna1 paź 2005 · Abstract and Figures An experimental study of fully developed confined impinging axisymmetric water vapor jet is completed with turbulent characteristics … dainty rings for teens

Large-eddy simulations of axisymmetric excitation effects on a row …

Witryna25 sty 2010 · Abstract The impingement of turbulent jets on solid boundaries has been studied extensively in the past. It has been established that flow parameters in the impingement region are governed by the impingement height, H and the initial … Witryna20 kwi 2006 · In a high-speed subsonic jet impinging on a flat plate, the surface pressure fluctuations have a broad spectrum due to the turbulent nature of the high-Reynolds … Witryna21 mar 2024 · Screech was first described by Powell in a series of papers on both planar and axisymmetric jets in the 1950s. 10, 11 Powell’s findings, based on experimental observation, can be summarized as follows: 1. Imperfectly expanded jets produce a discrete tone whose wavelength relates to the shock spacing (and thus degree of … biophilic wallcovering

Axisymmetric wall jet development in confined jet impingement

Witryna19 kwi 2006 · This paper reports on an extensive experimental study of the flows due to under-expanded axisymmetric jets impinging on flat plates. The range of plate … Witryna1 kwi 1998 · The purpose of the present study is three-fold: to experimentally investigate the characteristics which are unique to confined and submerged impinging jets; to contrast these with the flow fields for free-surface and submerged but unconfined jets; and to interpret the respective heat transfer characteristics in light of the differences in … dainty restaurant angeles city menuWitrynaAn experimental and numerical study of impinging, incompressible, axisymmetric, laminar jets is described, where the jet axis of symmetry is aligned normal to the wall. Particle streak velocimetry (PSV) is used to measure axial velocities along the centerline of the flow field. biophilic wall

"Witryna15 lut 2024 · This paper describes the results of methodical investigations of the effect of the Pitot tube on measurements of gas-dynamic parameters of supersonic axisymmetric underexpanded real and model microjets. Particular attention is paid to distortions of Pitot pressure variations on the jet axis associated with the wave structure of the jet and to … " - Impinging of axisymmetric developing jets

Impinging of axisymmetric developing jets

An Experimental Investigation of Starting Impinging Jets

Witryna20 kwi 2006 · Detailed measurements of the velocity profiles in a laminar axisymmetric submerged jet of water were taken using a laser-Doppler anemometer. A non-intrusive measurement technique is particularly advantageous in this application owing to the unstable nature of the laminar jet and the destabilizing effect which objects … WitrynaImpinging Jet Flow 5.1 Introduction The axisymmetric impinging jet ﬂow is geometrically simple. Figure 5.1 shows a schematic of the particular arrangement …

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WitrynaAn impinging cooling system comprises a jet of high-velocity fluid striking a hot target surface. The fluid jet picks up thermal energy from the hot surface, thus enhancing heat transfer from it. During this process, thermal energy is transported from the hot surface to the fluid via forced convection, raising the fluid temperature in the ... Witrynacavity formed by the main- and side-nozzleblocksand the jet As suggested flows remainedrelatively fixed and independentof the main-jet by the appearanceof the soundfield observedin shadowgraphs, the useof increasing pressures supply pressureand percent impingement,attempts were made side-jetoperating from zeroto …

WitrynaDesign, development, and validation of concepts for generating passive pulsation in cooling nozzles Witryna1 mar 2014 · The optimal impinging jet system was based on four design variables: the spacing between the impinging jets and effusion holes (1.0 ≤ Sp ≤ 5.0), the channel height from impinging jet to effusion surface (1.0 ≤ Ht ≤ 3.0), the mass flux ratio of the crossflow to the impinging jet flow (0.1 ≤ G∗ ≤ 1.3, −1.3 ≤ G∗ ≤ −0.1), and the main …

WitrynaPhysical Modelling of Axisymmetric Turbulent Impinging Jets as used within the Nuclear Industry for Mobilisation of Sludges D. McKendrick 1, S. R ... similar to the d10 jet development, but by D/d of 15 the peak horizontal velocity is already decreasing and the jet height increasing. 10 20 30 40 50-40 -20 0 20 40 60 80 100 120 140 160 ... WitrynaAn analytical research was conducted to study heat transfer from horizontal surfaces to normally impinging circular jets under arbitrary-heat-flux conditions. The laminar thermal and hydraulic boundary layers were divided into five regions of flow. General expressions of heat transfer coefficients were obtained in all the four regions of stagnation and …

Witrynaan axisymmetric impacting jet We turn to the case of the impinging jet. In the impingement region, it can be argued that the inertia terms in the equations of motion …

Witryna25 sty 2010 · This paper presents the results of an experimental study of the erosion of a cohesionless bed by obliquely impinging circular turbulent jets. The jet of air, with velocity of 27.3 to 86.8 m/s... biophilic wall panelsWitryna1 cze 2015 · These jets are vital for efficient dredging and are used to fluidise the soil. This reduces forces on the cutting teeth and makes the sand-water mixture more suitable for upward transport through... dainty rings goldWitrynaIn the authors words, the overall goal is make the complex simple, without losing the essence--the virtue--of the complexity.Modeling Axisymmetric Flows: Dynamics of Films, Jets, and Drops is the first book to cover the topics of axisymmetric laminar flows; free-boundary flows; and dynamics of drops, jets, and films. biophilic wall designWitrynaTurbulence energetics in an axisymmetric impinging jet flow. Physics of Fluids 2024, 31 (5) , ... The effect of inflow conditions on the development of non-swirling versus … dainty rice in a can cooking instructionshttp://s177835660.websitehome.co.uk/research/THESIS/imp_jet.pdf dainty rice pilaf biophiteWitrynathe impinging jet scenario. The wall jet resulting from axisymmetric impinging jets has been studied experimentally [15, 16]; the studies show that the wall jet developed downstream of impingement does demonstrate self-similar behavior. We present a parametric study that characterizes the velocity profile and wall shear stress of the dainty ring set