In order to specify the rationality of the method of blocked holes in the current combustor flow distribution test

the numerical simulation was conducted according to the actual test procedure of a can combustor flow distribution

the test method error and the root of the generation were analyzed

the optimizational test method of associating blocked holes and accumulated blocked holes of single side was proposed

and the validation was carried out by numerical simulation. Results indicated that there were definite method errors in the flow distribution test using blocked holes method

the effects of this method on the measurement error of primary holes

dilution holes and film cooling holes on the liner were greater

while the effect on dome measurement error was smaller; the simultaneous neglect of passing flow condition of tested holes and downstream holes was the main reason; the measurement error can be reduced significantly by associating blocked holes and accumulated blocked holes of single side for the flow distribution measurement of primary holes

dilution holes and film cooling holes

which can be reduced by about 6%

12% and 9%

showing definite improvements; There was method error before and after the test method was optimized

the static pressure difference of import and export sections of each holes on the liner changed when some holes were blocked

which was the primary cause for the existing method error

but the variation of the static pressure difference and its influence on the measurement results were smaller after the test method was optimized.