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Transcript

Motivation

3

4

5

2

Motivation

7

6

Motivation

Possible tip profiles

Motivation

Requirements

Subsonic flow and Supersonic flow

Forward flight

Hovering

Main Objectives

Static and dynamic behavior

Profile oscillates 6º

CL max 30% higher than in the static case.

Figure-of-eight Different flight conditions

CLmax

Resistence

Divergence Mach number

1

8

CONTENT

Requirements

Constraints

Motivation

Requirements

Reference airfoils

Intermediate design

Final design

Summary

Low negative or positive CM0

Profile thickness

Mach selection

Airfoil for the main rotor of an Helicopter

9

Requirements

Summary

Univerität Stuttgart

Profilenwurf

10

Reference airfoils

16

Summary

NACA 0012

NACA 23012

Design goals

Improvement:

- Transition Ramp

Thickness/Drag Ratio

11

Reference airfoils

RAE 96

VR

15

Final design

12

Intermediate design

TRA1

TRA2

Mach 0.55

Mach 0.2

14

13

Final design

TRA1

TRA2

Robert Martí Boix

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