The nature is in flowing.

We are devoted to understand the flow, and we are devoted to understand the nature.


Services

Airfoil Search

You can search an airfoil according to its name, its geometry characteristics, or its performances.

By now, Upwhirlwind provides 1710 (util 2025-01-16) airfoils' performance in a serials of Mach and Reynolds numbers. The Mach number is range from 0 to 0.5 with interval 0.1; The Reynolds number is one of 50000, 100000, 500000, 1000000 or 5000000.

Airfoil Performance Calculation

Occasionally, you may want calculate you own airfoils performance, or, you may want get an airfoils' performance in a different Mach/Reynolds number.

Airfoil Search by Performance

If you want get a best airfoil in a certain Mach/Reynolds number, please try this service.

Note: This service will consume much time. So, be careful to use it.

Blade/Wing Generator

Generate a blade or wing with root and tip airfoils, sweep and twist angles. Export the CAD data in STL format.

Axial Fan Design

Given the total pressure and flow, an axial fan is designed with the optimized aerodynamic performance.

Centrifugal Fan Design

This is not a free service. We have rich experience on general and multi-blades centrifugal fan design from the engineer design, to CFD simulation,until to wind tunnel experiment.

 

Tools

NACA airfoil generator

This tool can generate NACA airfoils with 4 or 5 digits and their modifications. 6 digits airfoils are not supported currently since they are not simply analytical.

Internaltion Standard Atomosphere
Viscosity

Provides the viscosity of air and water in different temperature.

Humidity, Dew and Boiling Point