The heat transfer of a hydrocarbon fuel was investigated experimentally under steady states and pressure-transient states with respect to engineering applications for the scramjet regenerative cooling system. The experiments were carried out in a uniformly heated horizontal minitube with an inner diameter of 1.0 mm. The main objective of this study was to compare the heat transfer coefficients under steady states with those under pressure-transient states as well as to investigate the effect of the pressure-transient rate on heat transfer. The results show that the steady-state heat transfer coefficients are higher than the transient-state heat transfer coefficients, especially in the vicinity of the critical point. Accordingly, the thermal margin for a regenerative cooling system could be further increased by approximately 25% to ensure the reliability of the safety analysis under abnormal pressure-transient conditions.
Heat Transfer of Hydrocarbon Fuel Under Steady States and Pressure-Transient States
Journal of Propulsion and Power ; 32 , 1 ; 38-45
2015-08-13
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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