... ratio. As the blowing ratio increases the coolant jets separate from the surface and the effectiveness significantly decreases. This phenomenon can be seen in Figs. 7 and 8 , as the coolant traces are degraded for M = 0.8 and are almost completely depleted for M = 1.2. Second, the pressure side...

.... In this article, a jet cooling method was proposed. The feasibility of jet cooling method was studied by taking a 600 kW PMSM as a prototype. Based on the Euler two-phase model, the effect of thermal performance was numerically studied, varying different inlet velocity, inlet liquid volume fraction, and jet cone...

...Sachin K. Mishra; Ashok K. Barik; Prafulla K. Swain A passive infrared suppression (IRS) device is an important and integral part of the modern naval/cargo ships, fighter jets, and helicopters to cool down the hot exhaust gas to suppress the infrared (IR) signatures. A modified IRS device has been...

...Emidio Tiberi; Marzio Piller; Arianna Bozzato; Luca Toneatti; Dario Pozzetto The need for faster, safer, and environmentally compatible thawing methods is perceived in different branches of food industry, as, e.g., in the fast-food sector. We investigate a prototype of jet-impingement, batch...

... (=1 if i = j and 0 if i ≠ j ) μ = kinetic viscosity, kg/(m s) μ t = turbulent (or eddy) viscosity, kg/(m s) ρ = density, kg/m 3 ∞ = conditions in crossflow 0 = exit section of the jet ¯ = Reynolds average ˜ = Favre...

...Emmanuel K. K. Agyeman; Pierre Mousseau; Alain Sarda; Denis Edelin; Damien Lecointe Multiple water jets and a cross air flow are used to cool a mold segment in a homogeneous and automated manner. The test segment was cooled from an initial temperature of 573 K. An average temperature difference...

... 20 08 2020 10 12 2020 12 12 2020 05 03 2021 micro-channel single-phase heat transfer bypass injection wall temperature uniformity heat transfer coefficient pressure drop conduction electronic cooling forced convection heat transfer enhancement jets wakes...

...Farhana Afroz; Muhammad A.R. Sharif Heat transfer from an isothermally hot flat surface due to swirling coaxial turbulent jet impingement is investigated numerically. The coaxial jet construction consists of implanting a thin-walled round tube inside a coaxial outer pipe. Two different fluid...

...Kashinath Barik; B. Swain; A.R. Pati; Susmit Chitransh; S.S. Mohapatra In the current investigation, by using a very low mass flux co-axial laminar multiphase fluid jet, enhancement in heat transfer rate, uniformity in heat flux distribution, and reduction in coolant consumption rate...

...Sara Seitz; Lesley M. Wright Two-color, toluene-based, planar laser-induced fluorescence (PLIF) is utilized to characterize the thermal structure of a turbulent, free jet. The PLIF technique has been used to measure concentration gradients for combustion applications, but its use to quantify...

... 10 2019 31 12 2019 01 01 2020 21 01 2020 slitted cylinder separation bubble heat transfer enhancement vortex suppression forced convection heat and mass transfer jets wakes and impingement cooling thermal systems To comprehensively understand the flow physics...

...Srivatsan Madhavan; Kishore Ranganath Ramakrishnan; Prashant Singh; Srinath Ekkad Array-jet impingement is typically used in gas turbine blade near-wall cooling, where high rates of heat dissipation is required. The accumulated crossflow mass flux results in significant reduction in jet...

...Shailesh N. Joshi; Danny J. Lohan; Ercan M. Dede The heat transfer and fluid flow performance of a hybrid jet plus multipass microchannel heat sink in two-phase operation is evaluated for the cooling of a single large area, 3.61 cm 2 , heat source. The two-layer branching microchannel heat sink...

... . Manuscript received June 22, 2017; final manuscript received April 22, 2018; published online June 14, 2018. Assoc. Editor: Sandip Mazumder. 22 06 2017 22 04 2018 Forced convection MHD Jets Wakes Impingement Cooling Centrifugal techniques are well-established methods...

...Prashant Singh; Srinath V. Ekkad The present study investigates the effects of Coriolis force and centrifugal buoyancy force on heat transfer due to jet impingement on dimpled target surface (DT). Detailed heat transfer measurements were carried out using transient liquid crystal (LC) thermography...

... be explained by flow visualizations: The break-up of the jets streaming from upper end-windings forms droplets. A part of these droplets is driven toward the flange due to rotational effects. The amount of oil impinging on the lower end-windings is thus reduced at high rotation speed. This flow phenomenon must...

...Belkacem Abderrezzak; Yong Huang This study was conducted to investigate the effect of cavitation on liquid jet atomization characteristics in nozzles of different length to diameter (L/D) ratios. For this purpose, a spray test facility with an ambient pressure chamber was constructed, and sprays...

...Fatih Selimefendigil; Hakan F. Öztop Numerical study of jet impingement cooling of a corrugated surface with water–SiO 2 nanofluid of different nanoparticle shapes was performed. The bottom wall is corrugated and kept at constant surface temperature, while the jet emerges from a rectangular slot...

...Abhishek B. Bhagwat; Arunkumar Sridharan Jet impingement cooling has been studied extensively as this finds applications in the areas of reactor safety, electronic cooling, etc. Here, the convective heat transfer process between the air jet impingement on a uniformly heated inclined flat plate...

...Feng Zhou; Yan Liu; Yanghe Liu; Shailesh N. Joshi; Ercan M. Dede The present work is related to the design of a manifold mini/microchannel heat sink with high modularity and performance for electronics cooling, utilizing two well established (i.e., jet impingement and channel flow) cooling...