Grouping method for swirler parts and group matching method for swirler assemblies

The invention provides a grouping method for swirler parts and a group matching method for swirler assemblies. The grouping method comprises the following steps: step S1: measuring air flow values of a plurality of sample parts; step S2: ranking the air flow values of the sample parts in a gradually increasing order; step S3: determining the value interval of the air flow values of the sample parts; step S4: determining the number of groups; step S5: determining the increase value of the interval; step S6: dividing the value interval into multiple grouping intervals for dividing the groups according to the increase value of the interval; step S7: determining the group of each to-be-grouped part according to the grouping intervals; and step S8: respectively making the group of each to-be-grouped part on the to-be-grouped part. As the grouping intervals are determined, the groups of the to-be-grouped parts can be determined according to the grouping intervals within which the air flow values of the to-be-groupe