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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