免费马赫数计算器
将飞行速度转换为马赫数。
m/s
°C
Mach Number
1.980
音速343.4 m/s
Mach Number vs Object Speed
公式
## Mach Number The Mach number is a dimensionless ratio comparing an object's speed to the speed of sound in the surrounding medium. ### Formula **M = v / v_sound** - M < 1: subsonic - M = 1: sonic (speed of sound) - M > 1: supersonic - M > 5: hypersonic
计算示例
An aircraft flying at 680 m/s in air at 20 degrees C.
- 01v_sound = 331.3 + 0.606 * 20 = 343.4 m/s
- 02M = 680 / 343.4
- 03M = 1.980
- 04The aircraft is supersonic (M > 1)
常见问题
What happens at Mach 1?
At Mach 1, a shock wave forms around the object, producing a sonic boom. This is called the sound barrier.
Does the speed of sound change with altitude?
Yes. Temperature decreases with altitude, so the speed of sound also decreases, meaning the same airspeed gives a higher Mach number at altitude.
What is the fastest manned aircraft?
The SR-71 Blackbird reached about Mach 3.3. The X-15 experimental aircraft reached Mach 6.7.
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