Доступ предоставлен для: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

SUPERCRITICAL-PRESSURE CONJUGATE HEAT TRANSFER OF AVIATION KEROSENE WITH FUEL PYROLYSIS IN RIBBED TUBE

Get access (open in a dialog) DOI: 10.1615/IHTC16.hte.023542
pages 5561-5568

Аннотация

Supercritical-pressure heat transfer with endothermic fuel pyrolysis plays an important role in regenerative engine cooling in propulsion systems. In this paper, conjugate heat transfer and fuel pyrolysis of the aviation kerosene RP-3 in a ribbed tube are numerically studied at a supercritical pressure of 5 MPa, with consideration of detailed pyrolytic chemical reactions and proper treatment of fluid thermophysical property variations. Results indicate that a ribbed tube is very effective in enhancing heat transfer of a hydrocarbon fuel at supercritical pressure, particularly in the inlet region, in which the tube wall temperature can be reduced by around 300 K. A ribbed tube surface makes significant impacts on fluid temperature distribution and thus fuel pyrolysis, which is strongly temperature dependent. The enhanced heat transfer leads to higher fluid temperature inside a ribbed tube in the downstream section, in which significant fuel pyrolysis occurs not only in the near-wall region, as in a smooth tube, but also inside the tube. Therefore, the pyrolytic chemical reaction rate of RP-3 strongly increases in the downstream section in a ribbed tube. Results obtained herein have both fundamental and practical interests in regenerative engine cooling applications.