A heat transfer correlation is proposed for the pulsating flow in the tailpipe of a valveless Helmholtz pulse combustor. The correlation is developed based on the experimental data of the heat transfer in the straight tailpipe. The constants in the correlation are determined by least-squares fitting of experimental data. The regression model is assessed, and its significance is tested. The correlations of the 450, 90, and 135 elbow tailpipes are revised by multiplying factors to that of the straight tailpipe. The maximum error of the correlations is no more than 20%. (C) 2015 Elsevier Ltd. All rights reserved.