...Parampreet Singh; Ratna Kishore Velamati; Subhash Chander Radiative furnaces pose significant thermal inertia and single impinging flames have been observed to cause occurrence of hotspots on the target surface. Multiple burners arranged in suitable array configuration represent one...

... leading edge, which is arranged with one single row of film holes per side, which are located from the stagnation at a 15-deg angle. The four leading edge models, which are the combinations of the hole-shapes (cylindrical hole and laid-back hole) and intake structures (plenum and impingement), are tested...

.... It was found that the upward spiral flow and helical flow dominated the flow structure in the latticework duct. In addition, the impingement region (at the beginning of the subchannel) induced by the upward spiral flow was responsible for the high Nusselt number and wall shear stress. After adoption...

... in a vigorous vortex pair created at the orifice edges; whereas in the backstroke, the backflow momentum is weaker, despite the fact that mass is conserved. As a consequence of this, the approach can be potentially utilized for the impingement of a cooling fluid onto a heated surface. In previous studies...

... impingement for high heat flux cooling. However, all these research consider small heat source areas, typically about a few cm 2 . Can a large array of impingement pattern, covering a much wider area, achieve similar heat flux levels? This article presents liquid microjet array impingement cooling of a heat...

...D. Sui; T. Kim; M. L. Xu; T. J. Lu The thermal characteristics of exit flow issued from an axial fan widely used for impingement cooling of power electronics are experimentally studied. A new fan configuration is proposed to improve the impingement cooling performance at the center of a uniformly...

... methodology. Finally, a sensitivity evaluation has been performed by altering the position and alignment of the jet with respect to the heated surface. Two prime orientations of the jet have been considered, namely, perpendicular and cross jet impingement on the heater. It is found that if jet is placed...

...D. Sivakumar, JSPS Research Fellow; H. Nishiyama, Professor, A simple model is formulated for the analysis of the spreading and solidification processes of a molten metal droplet impinging on a solid substrate. At the first stage, the model evaluates the diameter and the radial velocity...

... = 81.4   μ m and W = 1.52   m / s impinging on a substrate with T o = 135 ° C The droplet spreading characteristics for the solidification case are shown in Figs. 4 and 5 for the impinging molten solder droplets with D = 81.4   μ m and W...

...John D. Bernardin; Issam Mudawar This study presents, for impinging droplets and sprays, a model of the Leidenfrost point (LFP); the minimum liquid/solid interface temperature required to support film boiling on a smooth surface. The present model is an extension of a previously developed sessile...

...Zhen-Hua Liu; Tie-Feng Tong; Yu-Hao Qiu An experimental investigation was carried out for predicting the critical heat flux (CHF) of steady boiling for a round subcooled water jet impingement on the flat stagnation zone. The experimental data were measured in a steady nucleate boiling state. Three...

...L. L. Dong; C. W. Leung; C. S. Cheung Experiments were carried out to study the heat transfer characteristics of a pair of premixed, laminar, rectangular, butane/air flame jets impinging vertically upon a water-cooled flat plate. The effects of jet-to-jet spacing and the nozzle-to-plate distance...

...A. K. Chaniotis; D. Poulikakos; Y. Ventikos The work presented in this paper focuses on the effect of jet pulsation on the heat transfer and fluid dynamics characteristics of single and double jet impingement on a constant heat flux heated surface. Specifically, the influence of frequency...

...Deborah V. Pence, Mem. ASME; Paul A. Boeschoten, Graduate Research Assistant; James A. Liburdy, Mem. ASME A computational study is presented of the heat transfer performance of a micro-scale, axisymmetric, confined jet impinging on a flat surface with an embedded uniform heat flux disk. The jet...

... the time required to cool a hot surface from 240°C to 120°C by an order of magnitude. water sprays quenching (thermal) dissolving cooling boiling drops evaporation Cooling Droplet Enhancement Heat Transfer Impingement Sprays 6 The effect of dissolving 0.06 mol/l of MgSO...

...Koichi Ichimiya; Yoshio Yamada This paper describes the heat transfer and flow characteristics of a single circular laminar impinging jet including buoyancy force in a comparatively narrow space with a confined wall. Temperature distribution and velocity vectors in the space were obtained...

...L. B. Y. Aldabbagh; I. Sezai; A. A. Mohamad The flow and heat transfer characteristics of an impinging laminar square jet through cross-flow have been investigated numerically by using the three-dimensional Navier-Stokes and energy equations in steady state. The simulations have been carried out...

... evaporation photographic applications flow visualisation surface tension Cooling Droplet Enhancement Heat Transfer Impingement Sprays When measuring heat transfer from a hot surface quenched by a spray, researchers typically use water that has been carefully distilled so as to remove any...

...Erick A. Siba; M. Ganesa-Pillai; Kendall T. Harris; A. Haji-Sheikh This study concerns the flow and heat transfer characteristics of a turbulent submerged circular air jet impinging on a horizontal flat surface when free stream turbulence exceeds 20 percent. The turbulent fluctuations of the free...

...G. F. Naterer Phase change heat transfer with impinging supercooled droplets on an ice surface is examined. Partial solidification of incoming droplets leads to an unfrozen water layer above the ice. The significance of temperature variations within the water layer is considered. The multiphase...