Impingement cooling of a confined circular air jet

San, Jung‐Yang; Huang, Chin-Hao; Shu, Ming-Hong

doi:10.1016/s0017-9310(96)00201-3

Cited by 71 publications

(30 citation statements)

References 15 publications

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“…It has been shown [5,16] that the heat source area (relative to the orifice area) influences the heat transfer rates obtained, especially for air jets; hence D e is included as a parameter in the correlations.…”

Section: Since the Effect Of H/d On Heat Transfer Coefficients Is Quimentioning

confidence: 99%

Prandtl-number effects and generalized correlations for confined and submerged jet impingement

Garimella

2001

International Journal of Heat and Mass Transfer

108

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The influence of fluid thermophysical properties on the heat transfer from confined and submerged impinging jets is experimentally investigated. Results from previous studies at low and high Prandtl numbers (using air and Fluorinert liquid FC-77, respectively) are supplemented by new experiments for an intermediate Prandtl number (using water). Local heat transfer coefficients are obtained from a discrete heat source under axisymmetric confined and submerged jets. The parameter ranges studied include: orifice diameters of 1.59 to 12.7 mm, turbulent-flow Reynolds numbers of 4000 to 23000, and orifice to heat-source spacings of 1 to 5 jet diameters. Generalized correlations for heat transfer rates are proposed based on these results, and are valid over the range of coolant Prandtl numbers from 0.7 to 25.2.

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Section: Since the Effect Of H/d On Heat Transfer Coefficients Is Quimentioning

confidence: 99%

Prandtl-number effects and generalized correlations for confined and submerged jet impingement

Garimella

2001

International Journal of Heat and Mass Transfer

108

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“…The most effective impingement cooling arrangement was found by changing jet parameters systematically, while keeping the cutting conditions constant throughout all the tests. Previous researchers Jung-Yang San et al [4] have examined the aspect of determining the most suitable jet diameter with respect to the air gap between the jet nozzle and a flat object. However, in this application there are other factors that have to be considered such as the position of the jet.…”

Section: Tic-sth 2009mentioning

confidence: 99%

Sustainable metal cutting

Boswell

Chandratilleke

2009

2009 IEEE Toronto International Conference Science and Technology for Humanity (TIC-STH)

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Abstract-Metal cutting companies are being compelled to reduce their impact on the environment as more international and government environmental protection legislation is introduced. Ensuring appropriate waste disposal measures are in place will be essential to allow companies to operate. Particular attention must be given to liquid coolant used in metal cutting as this is a significant source of environmental pollution. Dry machining is obviously more ecologically desirable for metal cutting as there are no environmental issues or disposal costs for the coolant. Unfortunately though, there are issues that need to be resolved before manufacturing companies will adopt dry machining, mainly associated with the reduction of tool life. However, from previous research, it has been shown that the introduction of cold air directed at the cutting zone significantly increased tool life removing coolant waste disposal costs. To further improve the up take of air cooling the most sustainable and most efficient method of generating cold air suitable for machining must be sought. Comparing three methods of providing cold air has shown that the vortex tube is the most suitable method for providing cold air to the tool interface.

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“…San et al [38] assessed the effect of varying D e /d on the heat transfer distribution. Increasing the heater size served to degrade the entire heat transfer distribution and reduce the magnitude of the secondary peaks.…”

Section: Article In Pressmentioning

confidence: 99%