Platelet actively cooled thermal management devices

Mueggenburg, H. H.; Hidahl, J. W.; Kessler, E; Rousar, D. C.

doi:10.2514/6.1992-3127

Cited by 15 publications

(7 citation statements)

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“…Platelet cooling technology has been developed as a very flexible thermal management method by designing diffusion bonding together thin metal platelets which contain etched coolant passages. The coolant passages are generally very small, from a dozens of microns to hundreds of microns range (Mueggenburg et al 2010). The advanced supercritical CO 2 Braydon cycle has gained much interest in renewable energy systems to improve the cycle efficiency.…”

Section: Introductionmentioning

confidence: 99%

Accelerating turbulence in heated micron tubes at supercritical pressure

Cao,

Xu,

et al. 2023

J. Fluid Mech.

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The purpose of this research was to provide further understanding of turbulent dynamics and heat transfer mechanisms in accelerating flows with thermophysical variations and pressure drops in micron tubes. Direct numerical simulations were conducted to investigate the turbulence to supercritical pressure ${\rm CO}_2$ in heated micron tubes with inner diameter $99.2~\mathrm {\mu }$ m. In general, the turbulent heat transfer enhancement/deterioration at supercritical pressure is dominated by variations in thermophysical properties, buoyancy and thermal acceleration; however, the mechanism differs in micron tubes ( $d^* < 100\ \mathrm {\mu }$ m). The results showed that the pressure drop and scale effect made significant contributions to the development of turbulence flows heated at supercritical pressure in micron tubes, leading to the prominent property change and flow acceleration in the inlet fully developed turbulent flow. The deviation on temperature distribution because of pressure changes was non-negligible. The primary contribution of the acceleration was the decay of a boundary layer, which significantly suppressed the production of turbulence and decreased heat transfer. The acceleration had stabilizing effects on the ejection and sweep motions of the turbulent flow. The high-speed fluid contributed to a new disturbance scenario of the flow with a larger spanwise wavenumber superimposed on existing perturbations. The high-speed streak width in the quasilaminar region was approximately $150$ – $160\nu /u_\tau$ in accelerating flow. In the micron tubes, the Reynolds stress events of quadrant Q4 contributed 60 % of the Reynolds stress, greater than those of quadrant Q2.

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Section: Introductionmentioning

confidence: 99%

Accelerating turbulence in heated micron tubes at supercritical pressure

Cao,

Xu,

et al. 2023

J. Fluid Mech.

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“…Since 1940s, hundreds of platelet devices have been presented to the public [1,2]. Those devices are widely used in the space industry as high temperature cooling parts [3].Besides, they are also used in many other fields, for instance, the platelet supercritical water-oxidizing reactors for the sewage treatment [4], the platelet fluid mixers [5], the platelet thrusters for the express vessels propulsion [6], the platelet fuel batteries [7] and the platelet gas controllers for the engine exhaust gas purification [8].…”

Section: Introductionmentioning

confidence: 99%

Thermal Wrinkling Analysis of the Platelet Thermal Management Devices

Zhang

Xiao

Liu

2012

AMR

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A simplified rectangular plate model is built up with three simply supported sides and one free side for the thermal wrinkling analysis of the platelet thermal management devices. By using the static method and the Galerkin's method, the thermal wrinkling of the structural plates under the uniform and no-uniform thermal stress is analyzed; meanwhile, numerical method for solving the platelets with three simply supported sides and one free side is also tested. The analysis method presents in the article could not only apply to the platelet thermal management devices, but also to the the wall of a rectangular vessel with an open top, and to the distortion of a welded plate structure.

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“…Researches and experiments indicate that transpiration cooling is one of the best and economical cooling methods [1]. The typical structure of transpiration cooling in LRE is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Formed Platelet Thermal Wrinkling in Platelet Transpiration Cooling

Hou

Liu

2011

AMR

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Under thermal stress, the formed platelet of Liquid Rocket Engine (LRE) transpiration cooling structure may result in wrinkling. The stability of rectangular sheet with three simple supported-sides and one free-side is simplified as the model of formed platelet. Applying the Galerkin method for analysis, the relationship of the critical thickness of formed platelet and the transpiration width is obtained. Also, the influence of different material properties on the critical thickness is presented. The theory and method proposed in this paper are applicable for more complicated temperature distribution and also can be used to choose material for transpiration cooling.

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Platelet actively cooled thermal management devices

Cited by 15 publications

References 0 publications

Accelerating turbulence in heated micron tubes at supercritical pressure

Accelerating turbulence in heated micron tubes at supercritical pressure

Thermal Wrinkling Analysis of the Platelet Thermal Management Devices

Analysis of Formed Platelet Thermal Wrinkling in Platelet Transpiration Cooling

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