请教一个基本问题

watermelon103

在文献里看到了impact pressure, pitot pressure,不知道是什么意思，它们都是指总压(total pressure)么？在我的印象里pitot pressure好像是总压，但是按文献里说的好像又不是。哪位能解释一下么？

通流

impact pressure 应该是动压，即 Pt-P
pitot pressure 就是总压吧。

wikipedia 的解释
Impact pressure is the difference between pitot pressure (also known as stagnation pressure or total pressure) and static pressure. In aerodynamics notation, this quantity is denoted as qc or Qc.

When input to an airspeed indicator, impact pressure is used to provide a calibrated airspeed reading. An air data computer with inputs of pitot and static pressures is able to provide a Mach number and, if static temperature is known, true airspeed.

Some authors in the field of compressible flows use the term dynamic pressure or compressible dynamic pressure instead of impact pressure.

xrs333

pitot pressure就是皮托管测量的压力值，就是总压。