Experimental investigation on heat flux measurement of nozzle throat

In order to isolate the effect of thermochemistry ablation on measuring the heat flux of nozzle throat, the experiments were carried out by using a HT50-20 heat flux transducer to obtain the heat flux density in nozzle throat under various incoming flow conditions as well as the parameters of the burning gases. Meanwhile, on the basis of experiments, numerical simulation was conducted to investigate the heat flux of nozzle throat. The experimental results show that the heat flux density is 0.496 MW/m², 0.471 MW/m², 0.317 MW/m² when the temperature of burning gases at the nozzle throat is 611 K, 551 K, 457 K respectively. Furthermore, the data of experiments can be used to validate the numerical simulation.