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Onset of Heat Transfer Deterioration in Supercritical Methane Flow Channels
Journal of Thermophysics and Heat Transfer, 2013The 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
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On the Onset of Heat Transfer Deterioration in Supercritical Coolant Flow Channels
43rd AIAA Thermophysics Conference, 2012The deterioration of forced convection heat transfer can affect channel flows of supercritical fluids, and therefore has to be taken in consideration when dealing with regenerative cooling of liquid rocket engines. A threshold value of the ratio between the heat flux and the specific mass flow rate is identified as the main parameter controlling the ...
URBANO, ANNAFEDERICA, NASUTI, Francesco
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Heat Transfer at Supercritical Pressures and the Onset of Deterioration
Volume 2: Thermal Hydraulics, 2006The comparison of the data on heat transfer at supercritical pressures (SCP) demonstrates that they have a considerable spread, which shows a complex nature of the process and a probable inaccuracy in the methods of data processing caused by a sharp change in thermophysical properties near the pseudocritical point.
Pavel L. Kirillov, Vera A. Grabezhnaya
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Numerical Analysis of Deterioration in Heat Transfer to Near-Critical Rocket Propellants
Numerical Heat Transfer, Part A: Applications, 2010Liquid 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 +2 more
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Volume 6: Thermal-Hydraulics, 2017
With the advantages of the thermophysical property of supercritical carbon dioxide (SCO2), SCO2 has been proposed for being used as the coolant of the secondary system in a nuclear reactor to promote a higher thermal efficiency. However, heat transfer deterioration (HTD) in supercritical fluid became a potential operational problem for the ...
Kin Wing Wong, Hui Cheng, Jiyun Zhao
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With the advantages of the thermophysical property of supercritical carbon dioxide (SCO2), SCO2 has been proposed for being used as the coolant of the secondary system in a nuclear reactor to promote a higher thermal efficiency. However, heat transfer deterioration (HTD) in supercritical fluid became a potential operational problem for the ...
Kin Wing Wong, Hui Cheng, Jiyun Zhao
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Heat transfer deterioration in helically coiled heat exchangers in trans-critical CO2 Rankine cycles
Energy, 2018Abstract The heat transfer deterioration (HTD) of supercritical CO2 encountered in trans-critical CO2 Rankine cycle is an important issue related the safety of the whole unit. For the purpose, numerical simulations are performed to get a further insight into the mechanism of heat transfer characteristics of supercritical CO2 flow in helically coiled ...
Xinxin Liu +4 more
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Impact of Fluid Property Modeling on Heat Transfer Deterioration
AIAA SCITECH 2022 Forum, 2022Nelson P. Longmire, Daniel T. Banuti
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An Experimental Study of Heat Transfer Deterioration at Supercritical Pressures
2017Convective heat transfer to CO2 flowing upward in electrically heated vertical tubes at supercritical pressures was studied for wall heat fluxes q within ranges that included values corresponding to the onset of heat transfer deterioration (HTD). The inlet pressure was P = 8.35 MPa, the mass flux was in the range 200 kg/m2s ≤ G ≤ 1500 kg/m2s, and the ...
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NEW INSIGHT INTO HEAT TRANSFER DETERIORATION
Proceeding of International Heat Transfer Conference 17, 2023openaire +1 more source
NEW UNDERSTANDING OF HEAT TRANSFER DETERIORATION DUE TO BUOYANCY
Proceeding of International Heat Transfer Conference 17, 2023Zewen Zou +3 more
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