Experimental study on effect of pyrolysis on heat transfer of n-decane at different pressure

The heat transfer characteristics with pyrolysis of n-decane flowing through a horizontal mini circular tube of GH3128 were experimentally investigated at different supercritical pressures. The Reynolds number ranged from about 1600 to 51000. Both the outer wall temperature and the fuel temperature measured were fixed. The effect of pyrolysis on heat transfer was discussed under different pressure and the outer wall temperature distribution types were analyzed by CFD. The heat transfer coefficient distributions with length was analyzed. And the improved heat transfer regimes in pyrolysis temperature range were discussed. The experimental results indicated that the pyrolysis had a significant effect on the n-decane heat transfer behaviors.