What is the relationship between Mach Number and Air Flow Noise?
What is the relationship between Mach Number and Air Flow Noise?
(OP)
What is the relationship between Mach Number and Air Flow Noise? What is the threshold of Mach that air flow noise is audible?





RE: What is the relationship between Mach Number and Air Flow Noise?
Typically in an exhaust manifold/downpipe you'll start to hear Mach noise at around 0.6-0.8 M bulk flow rate, as there is enough local acceleration to get you into trouble.
In an HVAC system you can hear flow noise at much slower speeds than that, .05M or less.
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: What is the relationship between Mach Number and Air Flow Noise?
RE: What is the relationship between Mach Number and Air Flow Noise?
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: What is the relationship between Mach Number and Air Flow Noise?
RE: What is the relationship between Mach Number and Air Flow Noise?
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: What is the relationship between Mach Number and Air Flow Noise?
- Steve
RE: What is the relationship between Mach Number and Air Flow Noise?
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: What is the relationship between Mach Number and Air Flow Noise?
RE: What is the relationship between Mach Number and Air Flow Noise?
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