Name: Model for Vortex Ring State Influence on Rotorcraft Flight Dynamics
Price: 1030.00 TWD
Availability: InStock
Author: Nasa Technical Reports Server (Ntrs) ; Johnson, Wayne
ISBN: 9781287237013

portada Model for Vortex Ring State Influence on Rotorcraft Flight Dynamics

Model for Vortex Ring State Influence on Rotorcraft Flight Dynamics

Type

Physical Book

Author

Wayne Johnson

Nasa Technical Reports Server (Ntrs)

Publisher

Bibliogov

Language

English

Pages

Format

Paperback

Dimensions

24.6 x 18.9 x 0.4 cm

Weight

0.16 kg.

ISBN13

9781287237013

Synopsis "Model for Vortex Ring State Influence on Rotorcraft Flight Dynamics"

The influence of vortex ring state (VRS) on rotorcraft flight dynamics is investigated, specifically the vertical velocity drop of helicopters and the roll-off of tiltrotors encountering VRS. The available wind tunnel and flight test data for rotors in vortex ring state are reviewed. Test data for axial flow, non-axial flow, two rotors, unsteadiness, and vortex ring state boundaries are described and discussed. Based on the available measured data, a VRS model is developed. The VRS model is a parametric extension of momentum theory for calculation of the mean inflow of a rotor, hence suitable for simple calculations and real-time simulations. This inflow model is primarily defined in terms of the stability boundary of the aircraft motion. Calculations of helicopter response during VRS encounter were performed, and good correlation is shown with the vertical velocity drop measured in flight tests. Calculations of tiltrotor response during VRS encounter were performed, showing the roll-off behavior characteristic of tiltrotors. Hence it is possible, using a model of the mean inflow of an isolated rotor, to explain the basic behavior of both helicopters and tiltrotors in vortex ring state.

Customers reviews

Have you read this book? Login to add your review.

More customer reviews

0% (0)
0% (0)
0% (0)
0% (0)
0% (0)

Questions and Answers about the Book

Do you have a question about the book? Login to be able to add your own question.

Opinions about Bookdelivery

More customer reviews

Model for Vortex Ring State Influence on Rotorcraft Flight Dynamics - Nasa Technical Reports Server (Ntrs) ; Johnson, Wayne

Synopsis "Model for Vortex Ring State Influence on Rotorcraft Flight Dynamics"

Customers reviews

Frequently Asked Questions about the Book

Is the book original?

In what language is the book written?

What is the format of this book?

Questions and Answers about the Book

Opinions about Bookdelivery