🚰 管道流量与流速Pipe Flow Calculator

使用说明与常见问题How-to & FAQ

「管道流量与流速」是什么？What is the Pipe Flow Calculator tool?

流量 Q = 截面积 × 流速，截面积 = π d² / 4；同时给出雷诺数（按 20 °C 水）判断层流或湍流。本地处理。Flow Q = cross-section × velocity, with area = π d² / 4; plus the Reynolds number (water at 20 °C) to tell laminar from turbulent. Processed locally.

如何使用「管道流量与流速」？How do I use the Pipe Flow Calculator tool?

填写管道内径、流速和运动黏度，即可得到流量 Q（截面积 × 流速）以及雷诺数，用来判断是层流还是湍流。结果会随输入实时更新。Enter the inner diameter, the velocity and the kinematic viscosity to get the flow rate Q (cross-section × velocity) and the Reynolds number, which tells laminar from turbulent flow. The result updates as you type.

压降？Pressure drop?

压降需要用达西-魏斯巴赫或海森-威廉斯公式，还要管长和粗糙度。Pressure drop needs Darcy-Weisbach or Hazen-Williams plus pipe length and roughness.

能举个计算实例吗？Can you show a worked example?

例如在「管道流量与流速」中填 内径 mm = 50，流速 m/s = 2，运动黏度 m²/s = 1.004e-6，结果区显示：流量：0.00392699 m³/s；升/分钟：235.62 L/min；立方米/小时：14.137 m³/h；雷诺数：99,602 · 湍流For example, entering Inner diameter mm = 50, Velocity m/s = 2, Kinematic viscosity m²/s = 1.004e-6 in the Pipe Flow Calculator gives: Flow rate: 0.00392699 m³/s; Litres per minute: 235.62 L/min; Cubic metres per hour: 14.137 m³/h; Reynolds number: 99,602 · turbulent

哪些输入会被检查？Which inputs are validated?

「管道流量与流速」会检查这些输入——「内径 mm」、「流速 m/s」、「运动黏度 m²/s」：必须填写，须大于 0；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Pipe Flow Calculator checks its inputs — "Inner diameter mm", "Velocity m/s", "Kinematic viscosity m²/s": required, must be greater than 0; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「管道流量与流速」的设置：「内径 mm」默认 50；「流速 m/s」默认 2；「运动黏度 m²/s」默认 1.004e-6。每次生成结果都按当前设置处理。Settings in the Pipe Flow Calculator — "Inner diameter mm" default 50; "Velocity m/s" default 2; "Kinematic viscosity m²/s" default 1.004e-6. The result always uses the current settings.

计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?

「管道流量与流速」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Pipe Flow Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.

「管道流量与流速」免费吗？需要注册吗？Is the Pipe Flow Calculator free? Do I need an account?

「管道流量与流速」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Pipe Flow Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.