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Direct resist-free patterning of an organic semiconductor via thermal scanning probe lithography. [PDF]

Discov Nano
Luo K, Li J, Gu Y, Ma T, Zhang J, Cao L, Zhu Z, Tang H, Xu P, Jia H, Tu M, Li X.   +11 more
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Effect of non-uniform heating on scCO2 heat transfer deterioration

Applied Thermal Engineering, 2020
Abstract The accurate prediction of heat transfer deterioration (HTD) is important to ensure the safe operation of scCO2 cycles driven by various heat sources. Here, the scCO2 heat transfer experiment is performed in a 10 mm diameter vertical tube, covering the ranges of pressures 7.51–21.1 MPa, mass fluxes 488–1500 kg/m2s and heat fluxes 43.7–488 kW/
Bingguo Zhu, Jinliang Xu, Haisong Zhang   +2 more
exaly   +2 more sources

A model of heat transfer coefficient for supercritical water considering the effect of heat transfer deterioration

International Journal of Heat and Mass Transfer, 2019
Abstract Supercritical water has been widely used as working fluid in many thermodynamic cycles, predicting heat transfer coefficients of supercritical water precisely is of great importance to the system design. However, most of the existed correlations could not give satisfying results when heat transfer deterioration happens.
Bofeng Bai
exaly   +2 more sources

Numerical Analysis of Deterioration in Heat Transfer to Near-Critical Rocket Propellants

Numerical Heat Transfer, Part A: Applications, 2010
Liquid propellants, which are typically used for regenerative cooling of rocket thrust chambers, can flow in channels at supercritical pressures and in the neighborhood of pseudocritical temperature (near-critical fluid). This could be for instance the case for the envisioned liquid-oxygen/liquid-methane engines with chamber pressures larger than about
PIZZARELLI, MARCO, URBANO, ANNAFEDERICA, NASUTI, Francesco   +2 more
openaire   +2 more sources

A CFD-derived correlation for methane heat transfer deterioration

Numerical Heat Transfer, Part A: Applications, 2015
ABSTRACTMethane heat-transfer deterioration can occur in the regenerative cooling channels of future liquid-oxygen/liquid-methane rocket engines with chamber pressures higher than about 50 bar. Aiming to improve the prediction capabilities for the design of such systems, in the present study, a Nusselt number correlation able to describe the convective
PIZZARELLI, MARCO
openaire   +3 more sources

Heat Transfer Deterioration Onset of Hydrocarbon Fuel at Supercritical Pressure

Volume 5B: Heat Transfer, 2017
The present study pays attention to the pressure effect and geometric effect on heat transfer deterioration onset to supercritical hydrocarbon fuel. Numerical simulation about heat transfer deterioration of hydrocarbon fuel flowing upward in vertical round tubes with various diameter at supercritical pressure was performed.
Zeyuan Cheng, Zhi Tao, Jianqin Zhu, Haiwang Li, Longyun Wang   +4 more
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Onset of Heat Transfer Deterioration in Supercritical Methane Flow Channels

Journal of Thermophysics and Heat Transfer, 2013
The deterioration of forced convection heat transfer can affect channel flows of supercritical fluids and therefore has to be taken into consideration when dealing with regenerative cooling of liqu...
URBANO, ANNAFEDERICA, NASUTI, Francesco
openaire   +3 more sources

Conditions for the occurrence of heat transfer deterioration in light hydrocarbons flows

International Journal of Heat and Mass Transfer, 2013
Abstract Heat transfer deterioration could affect heated channel flows of supercritical pressure fluids in a number of technological applications. Aim of the present study is to analyze the phenomenon onset and to investigate its dependence on the pressure, for three light hydrocarbons: methane, ethane and propane. To this goal a parametric numerical
URBANO, ANNAFEDERICA, NASUTI, Francesco
openaire   +3 more sources