Experimental investigation on high temperature deformation of regeneratively cooled combustor structure based on non-contact measurement

In order to obtain the high temperature deformation of the generatively cooled combustor structure in ground test, experimental investigation based on non-contact measurement was conducted. The speeded-up robust feature algorithm and the improved digital image correlation of cylindrical surface were used to measure the total deformation and the partial strain of the combustor, respectively. The results show that the experimental total deformations and partial strains of the combustor were about 4.8 mm and 0.0049 respectively under the stable working condition. The experimental results agree well with engineering rough estimated ones, which shows that the presented non-contact measurement is applicable for combustor structure design and the experimental data are useful for validating the numerical calculation of the three-dimensional structural strength analysis.