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Fig. 6. Shockwave structure formed by the flow around two wedge models

transition from sharp to blunt-nose wedges. It can be observed that of

the model gas dynamic passageway was “filled” more rapidly with the

higher pressure flow region generated by the shock waves which is caused

by the head shock waves formation at the leading blunt-nose edges. From

this standpoint the bluntness plays undoubtedly a positive role. It should

be also noted that during the interaction of the blunt-nose shock wave with

the boundary layer local heating is observed near the surface [1, 12].

Numerical modelling of the flow in the gas dynamic passageway

model. Main equations.

For the numerical modelling of the gas dynamic

processes in the shock tube testing chamber which was described above,

let’s assume that the flow is described by Navier–Stokes–Fourier equations

ISSN 0236-3941. HERALD of the BMSTU. Series “Mechanical Engineering”. 2015. No. 1 11