**Appendices and nomenclature**


The effect of compressibility is shown in **Figure 10**, which shows the ratio of the

*Influence of Mach number of compressible flow on pressure-drop coefficient on the surface of the an ellipse and*

It follows from **Figure 10** that the effect of compressibility for two-dimensional ellipses at the same Mach number is greater than for 3D-spheroids. **Figure 11** shows the results of calculating the pressure-drop coefficient for compressible and incom-

As seen in **Figure 11**, the compressibility effect has a stronger effect on 2D

This paper presents the results of calculating the critical Mach numbers of the flow around two-dimensional and axisymmetric bodies. A sufficiently high accuracy of calculating the critical Mach numbers for engineering calculations using the

for compressible and incompress-

relative maximum velocities *U*max ¼ *U*max*=U*<sup>∞</sup>

bodies than on axisymmetric bodies.

**4. Conclusions**

**186**

**Figure 10.**

*Aerodynamics*

**Figure 11.**

*spheroid.*

ible flows on the surface of 2D ellipses and 3D spheroids.

*Maximal velocities on surface of the ellipse and spheroid vs. Mach number.*

pressible flows on the surfaces of two- and three-dimensional bodies.

*Aerodynamics*
