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Mach number is the ratio of object speed to local sound speed. It determines aerodynamic behavior: subsonic (M<1), transonic (M≈1), or supersonic (M>1).
Công thức
The calculator applies M = v / v_sound
- M
- v / v_sound — v / v_sound
Hướng dẫn từng bước
- 1Enter object velocity and local sound speed
- 2The calculator applies M = v / v_sound
- 3Results show flight regime and aerodynamic characteristics
Ví dụ có lời giải
đầu vào
v = 340 m/s (aircraft), v_sound = 340 m/s (sea level)
Kết quả
M = 1.0 (transonic, breaking sound barrier)
Speed of sound varies with temperature
Lỗi thường gặp cần tránh
- ✕Using ground temperature instead of local air temperature
- ✕Forgetting that sound speed changes with altitude and temperature
Câu hỏi thường gặp
Why is speed of sound important?
Below Mach 1, air flows smoothly. Above it, shock waves form, dramatically increasing drag and heat.
What is the sound barrier?
It's not a physical barrier; at Mach 1, aerodynamic changes are dramatic. Experienced pilots can exceed it safely.
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