The law of similarity of fan speed change
Estimate the flow rate, pressure difference and power after the variable speed under the same fan and similar working conditions.
The law of similarity of fan speed change User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- The speed is from 1000 to 1200 rpm, and the original flow rate, differential pressure and power are input.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
The flow rate is compared to the rotation speed once, the pressure difference is in the square ratio, and the power is in the cube ratio.
scope of use
Approximate relationships of similar conditions and constant dimensional density are only applicable, and are not used for equipment safety or motor selection conclusions.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
Approximate relationships of similar conditions and constant dimensional density are only applicable, and are not used for equipment safety or motor selection conclusions. Please compare the input unit, rounding method, applicable rules and data version first.