泵相似定律

由转速和叶轮直径变化比较流量、扬程和功率缩放，并用条形图显示。

visual calculator涡轮机械与旋转流

先看流动形态，再相信数字。

该工具把 CFD 设置转换为工况、尺度和主导效应提示。调节下方计算器，观察动态图与计算结果如何一起变化。

输入尺度

模型

判断

pumpaffinity lawsrotating machineryscaling

公式

KaTeX rendered

\begin{aligned}\text{Q2/Q1 = (N2/N1)(D2/D1)\^{}3}\\[0.35em]\text{H2/H1 = (N2/N1)\^{}2(D2/D1)\^{}2}\\[0.35em]\text{P2/P1 = (N2/N1)\^{}3(D2/D1)\^{}5}\end{aligned}

ASCII source

Q2/Q1 = (N2/N1)(D2/D1)^3, H2/H1 = (N2/N1)^2(D2/D1)^2, P2/P1 = (N2/N1)^3(D2/D1)^5

Q1 (m3/s)H1 (m)P1 (W)rpm1rpm2D1 (m)D2 (m)

flow

before0.080

after0.107

head / 100

before0.350

after0.622

power / 10000

before0.420

after0.996

N2/N1

1.3333

D2/D1

1.0000

Q2 (m3/s)

0.1067

H2 (m)

62.222

P2 (W)

9955.56

Affinity laws are first-pass similarity scalings. Cavitation, Reynolds effects, and off-design separation can break them.