Open Channel Foundation
Not Logged In |  | 
Open Channel Foundation

Quick Application Search:

Get this title!

Basic information

Foundation :: Aerodynamics Applications :: DOWN


Flat Wake Rotor Inflow/Wake Velocity Prediction Code

DOWN Graphic Moderators:
Adopt This Application!

source code available SOURCE CODE AVAILABLE

The prediction of inflow to a helicopter rotor and the wake velocities below and behind are vital to the calculation of airloads on the rotor blades of a helicopter. DOWN is a computer program that assists designers with such predictions.

DOWN was created to implement a flat wake theory, a simple analysis for the calculation of rotor inflow and wake velocities. The analysis essentially treats the rotor wake geometry as rigid without interaction between induced velocities and wake structure. The code will predict three orthogonal incremental components of flow velocity at any point in any plane parallel or perpendicular to the rotor disk. Input to the code is entered interactively through the computer keyboard. The coded version of flat wake theory as implemented in DOWN provides vertical inflow patterns similar to experimental patterns for helicopter flight speeds greater than 60 knots.

DOWN carries the NASA case number LAR-14841. It was originally released as part of the Cosmic collection.
   More software from National Technology Transfer Center

Open Channel Software runs entirely on Open Source Software. We return value to the Software community in the form of services and original software. Most of our content is currently available as source code, with the copyright owned by the original author, All Rights Reserved. Everything else is Copyright ©2000 - 2014 Open Channel Software.
Free SSL Certificate
View our privacy statement.
Contact webmaster at openchannelsoftware dot org with questions.