静态压力在所有方向上均匀施加，而速度压力仅在气流方向上施加。这使得直接测量管道中的速度压力变得困难。
The static pressure is applied uniformly in all directions, while the velocity pressure is applied only in the air flow direction. This makes it difficult to directly measure the velocity and pressure in the pipeline.
简单地说，因为静压力也在向气流的方向推动，所以无法测量静速度压力。实际上，速度压力是通过测量垂直于气流的压力（静压）和平行于气流的压力（总压）来计算的。
Simply put, because the static pressure is also pushing in the direction of the air flow, the static velocity pressure cannot be measured. In fact, the velocity pressure is calculated by measuring the pressure perpendicular to the air flow (static pressure) and the pressure parallel to the air flow (total pressure).
静态压力和速度压力是相互转换的。每个管道的大小取决于决定流量的局部管道横截面速度。
Static pressure and velocity pressure are converted to each other. The size of each pipe depends on the local pipe cross-section velocity that determines the flow rate.


管道中的压力变化受以下影响：恒定横截面积：总损失和静态损失相等。分流段（管道尺寸增加）：速度压力增加，总压力降低，静态压力可能增加（静态回潮率），收敛段（管道尺寸减小）：流速压力沿流向增加，总压和静压降低。
The pressure change in the pipeline is affected by the following: constant cross-sectional area: the total loss is equal to the static loss. In the diverging section (the pipeline size increases): the velocity pressure increases, the total pressure decreases, the static pressure may increase (static moisture regain), and the convergence section (the pipeline size decreases): the velocity pressure increases along the flow direction, and the total pressure and static pressure decrease.
由于摩擦和湍流损失，总压通常沿气流下降。常州螺旋风管的承包商混合使用“静压”、“速度压力”和“总压”等术语非常普遍。术语“静态压力”通常用于风机选择；“速度压力”用于测量系统中的cfm，“总压力”用于查找速度压力。总压力决定了必须提供给系统。
Due to friction and turbulence losses, the total pressure usually drops along the flow. It is very common for Changzhou spiral duct contractors to use the terms of "static pressure", "velocity pressure" and "total pressure". The term "static pressure" is usually used for fan selection; "speed pressure" is used to measure CFM in the system, and "total pressure" is used to find the speed pressure. The total pressure determines that it must be provided to the system. 上一篇：通风管道中风管与支吊架的安装阐明
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