1. Mach number, critical Mach number, compressibility buffet, shock wave, aerodynamic heating, area rule;

2. Compressible flows have a Mach number greater than 0.8

3. The critical Mach number of the same spheroids in the different medium is deduced and the effect of compressibility under the same Mach number of main flow is analyzed.

4. At altitude, for reasons explained, Mach number is a function of temperature.

5. Aircraft flight instruments, however, operate using pressure differential to compute Mach number, not temperature.

6. The hot air permitted higher speeds before the critical Mach number was exceeded.

7. There exist a close coupling relation between the wind tunnel flow field parameters, total pressure and Mach number.

8. There exist a close coupling relation between the wind tunnel flow field parameters,[sentencedict .com] total pressure and Mach number.

9. The paper points out that the loss coefficient tends to increase abruptly when the hood inlet Mach number attains a certain magnitude.

10. The results indicate that the inlet Mach number and incidence have significant effects on the starting and ending positions of the viscous flow transition.

11. The numerical simulation technique is used to investigating the isentropic Mach number distribution on the different swept height blade surfaces of a turbine last stage blades.

12. The original scale as derived by Fujita was a theoretical 13-level scale (F0–F12) designed to smoothly connect the Beaufort scale and the Mach number scale.

13. Burble also occurs when a subsonic wing is at or near a compressibility Mach number when the wing first suffers a sudden separation of airflow resulting from a shock

14. C/SiC thermal protection scheme works well up to flight mach number not exceeding and only gas jet thermal protection scheme can protect strut leading edge from destruction up to Mach 8 and higher.