Experiments exploring the propagation of heat waves within cylindrical CH foams were performed on the Shenguang-III prototype laser facility in 2012. In this paper, the radiation fluxes out of CH foam cylinders at different angles are analyzed theoretically using the two-dimensional radiation hydrodynamics code LARED-R. Owing to the difficulty in validating opacity and equation of state (EOS) data for high-Z plasmas, and to uncertainties in the measured radiation temperature T_r and the original foam density ρ₀, multipliers are introduced to adjust the Au material parameters, T_r, and ρ₀ in our simulations to better explain the measurements. The dependences of the peak radiation flux F_max and the breakout time of the heat wave t_half (defined as the time corresponding to the radiation flux at half-maximum) on the radiation source, opacity, EOS, and ρ₀ scaling factors (η_src, η_op, η_eos, and η_ρ) are investigated via numerical simulations combined with fitting. Then, with the uncertainties in the measured T_r and ρ₀ fixed at 3.6% and 3.1%, respectively, experimental data are exploited as fiducial values to determine the ranges of η_op and η_eos. It is found that the ranges of η_op and η_eos fixed by this experiment overlap partially with those found in our previous work [Meng et al., Phys. Plasmas 20, 092704 (2013)]. Based on the scaled opacity and EOS parameters, the values of F_max and t_half obtained via simulations are in good agreement with the measurements, with maximum errors ∼9.5% and within 100 ps, respectively.