Abstract:
The Weber number in an icing wind tunnel test is often different from that of the real flight icing condition due to the limitation of facility capacity. In order to obtain consistent result of aimed Weber number, the test ice shape need to be modified. The reason of icing test data correction is analyzed in this paper. A method for ice shape modification based on the ice geometric features is proposed. The ice shape of a supercritical airfoil is simulated under the condition of different Weber number, and the effect of Weber number on icing is studied. Then the ice shape modification based on constant Weber number is carried out. It is found that:(1) The Weber number mainly affects ice horns, and has little influence on droplet collection, icing limit and thickness; (2) There is a sensitive value existed, as the Weber number changes smaller than the value ice varies little, while the Weber number is bigger than the value, ice will vary obviously according to the change of this Weber number; (3) The proposed ice modification method can guarantee the agreement between the modified and the target ice shape, so the ice shape differences caused by Weber number differences can be amount to eliminated, and the precision of test will be improved.