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First Flight of the Inverted Joined-wing

Demonstrator and Beyond

Cezary Galiski Instytut LotnictwaJarosaw Hajduk Instytut Techniczny Wojsk Lotniczych

Jacek Mieloszyk Politechnika Warszawska

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Genesis of the programme [1, 2]

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A

H

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

The goal of the programme

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1. To learn as much as possible aboutinverted joined wing configuration

2. To develop tools formultidysciplinary optimization of

radical airplane configurations

3. To built flying demonstrator which

could be converted into UAV

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Structure of the programme [3]

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Multidysciplinary optimization software development

Preparato

ryexperimen

t

CFDa

nalysis

andop

timization

Windtunneltesting

Flig

httesting

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

The goal of the flying demonstrator experiment

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1.To learn as much as possible about

inverted joined wing handling qualities

2.To built flying demonstrator which

could be converted into UAV

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Tested UAVs

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3,1

1m

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Analyses and laboratory measurements [4, 5, 6, 7]

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

First and second flights

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

First and second flights

9/25fot. Adam Dziubiski ILOT

http://youtu.be/ElXQzPhTayo

http://youtu.be/ElXQzPhTayohttp://youtu.be/ElXQzPhTayo

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

First flight with aft CG and in windy weather

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Rotational velocity P

Rotational velocity R

Ailerons deflection [%]

Rudder deflection [%]

F [o]

max. ailerons deflection +8.5o-15.5o, max. rudder deflections 20o

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Structure of the programme

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Multidysciplinary optimization software development

Preparato

ryexperimen

t

CFDanalysis

andop

timization

Windtunneltesting

Flig

httesting

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

The goal

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1. To develop tools for multi-

disciplinary optimization of radical

airplane configurations

2. To check how much airplane

performance can be improved incomparison to the current

configuration

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Multidisciplinary optimization

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PANUKL [8]

CalculiX [9]

SDSA [10]

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Paralel processing

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Aerodynamic optimisation

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10

100

1000

10000

100000

1000000

0 5 10 15 20 25

Iterations

F_

OB

J

Best Worst

constraints:

LDobj CCF /1000

Lmg

0CGM

variables: 15 (50)

algorithm: Swarming

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Structural mesh generation

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Shear webs

Ribs

"Patch"

Aero mesh

PANUKL environm ent

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Pressure distribution maping

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-Loads

-Nodes

-Material

-Others

- Stress

- Strain

- Others- Geometry

- Pressure

distribution

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Before structural optimisation

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Large stresses in

joints

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Structural optimisation assumptions

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- Algorithms: Monte Carlo, Nelder-Mead

- 183 variables panel thicknesses

- Material: aluminum alloy

xVx

min

max

max

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

First attempt to structural optimization

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

The extension of the programme?

21/25ukasz Stefanek MSP

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Summary

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Airplane is airworthy and suitable for the following

flight tests

With aft CG position airplane stability is low but

acceptable

Development of the optimisation software is still

ongoing

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Acknowledgments

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This work was supported by The National Centre for

Research and Development under grant No. PBS/A6/14.

Special thanks to the all personnel of the Institute of

Aviation, MSP, Air Force Institute of Technology and

Warsaw University of Technology who made thisprogramme happen.

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Bibliography

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[1] Mamla P., Galinski C., Basic Induced Drag Study of the Joined-Wing Aircraft,Journal of Aircraft, Vol. 46, No. 4, 2009, pp. 1438-1440.

[2] Mamla P. Study of the joined-wing experimental airplane, Master Thesis inPolish, not published

[3] Galinski C., Hajduk J., Kalinowski M., Seneko K. The Concept of the JoinedWing Scaled Demonstrator Programme, 146 paper in proceedings of theCEAS2013 conference, Linkoping, 16 - 18 September 2013, pp. 244-253

[4] Dziubiski A., Kuprianowicz S., Surmacz K., Galiski C., tak J. The JoinedWing Scaled Demonstrator Results of CFD, 514 paper in proceedings of theICAS2014 conference, St. Petersburg, 07 - 12 September 2014

[5] Galinski C., Hajduk J., Kalinowski M., Wichulski M., Stefanek . Inverted JoinedWing Scaled Demonstrator Programme, 551 paper in proceedings of theICAS2014 conference, St. Petersburg, 07 - 12 September 2014

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First Flight of the Inverted Joined-wing Demonstrator and Beyond

Bibliography

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[6] Lis M., Dziubiski A., Galiski C., Krysztofiak G., Ruchaa P., Surmacz K.Predicted Flight Characteristics of the Inverted Joined Wing ScaledDemonstrator, 552 paper in proceedings of the ICAS2014 conference, St.Petersburg, 07 - 12 September 2014

[7] Bogdanski K., Krusz W., Rodzewicz M., Rutkowski M Design and Optimization ofLow Speed Ducted Fan for a New Generation of Joined Wing Aircraft, 663 paperin proceedings of the ICAS2014 conference, St. Petersburg, 07 - 12 September2014

[8] http://www.meil.pw.edu.pl/add/ADD/Teaching/Software/PANUKL

[9] http://www.calculix.de/

[10] http://www.meil.pw.edu.pl/add/ADD/Teaching/Software/SDSA

http://www.meil.pw.edu.pl/add/ADD/Teaching/Software/PANUKLhttp://www.calculix.de/http://www.meil.pw.edu.pl/add/ADD/Teaching/Software/SDSAhttp://www.meil.pw.edu.pl/add/ADD/Teaching/Software/SDSAhttp://www.calculix.de/http://www.meil.pw.edu.pl/add/ADD/Teaching/Software/PANUKL