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Fig. 5. Shockwave structure around two blunt-nose wedges; shadow-column images

of the test

In order to determine the flow velocity characteristics more accurately

and adjust the Schlieren equipment, experiments with sharp wedges were

conducted similar to the ones described above. The positioning of the

models also remained unchanged. The results are shown in Fig. 6.

The photos are in order corresponding to the order in Fig. 5. The

steady parameters flow approaches the model (Fig. 6

a

). It is replaced

by perturbations (Fig. 6

b

), which are followed by the quazi steady flow

process (Fig. 6

c

).

The comparison of the shockwave pattern for blunt-nose and sharp

wedges demonstrates the principal change in the flow structure at the

10 ISSN 0236-3941. HERALD of the BMSTU. Series “Mechanical Engineering”. 2015. No. 1