Prandtl-Glaubert rule
Quick Summary
The Prandtl-Glaubert rule is a concept in fluid mechanics that addresses compressibility effects in airflow at high speeds. It is related to the Mach number, which is the ratio of an object's speed to the speed of sound in the surrounding medium. When an aircraft approaches the speed of sound (transonic zone), drag increases significantly because the air can no longer be treated as incompressible. The Prandtl-Glaubert rule helps describe these compressibility effects, contributing to the understanding of aerodynamics, particularly at speeds approaching and exceeding the speed of sound.123456
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