Wind tunnel tests of the inverted joined wing and a comparison with CFD results

Cezary Galinski (Department of Aerodynamics, Institute of Aviation, Center of New Technologies, Warsaw, Poland)
Grzegorz Krysztofiak (Department of Aerodynamics, Institute of Aviation, Center of New Technologies, Warsaw, Poland)
Marek Miller (Department of Aerodynamics, Institute of Aviation, Center of New Technologies, Warsaw, Poland)
Pawel Ruchala (Department of Aerodynamics, Institute of Aviation, Center of New Technologies, Warsaw, Poland)
Marek Kalski (Department of Aerodynamics, Institute of Aviation, Center of New Technologies, Warsaw, Poland)
Mateusz Lis (GE, EDC Warsaw, Aviation Systems, Warsaw, Poland)
Adam Dziubinski (Department of Aerodynamics, Institute of Aviation, Center of New Technologies, Warsaw, Poland)
Krzysztof Bogdanski (Division of Airplanes and Helicopters, Warsaw University of Technology, Warsaw, Poland)
Lukasz Stefanek (MSP, Design Office, Warsaw, Poland)
Jaroslaw Hajduk (Department of Airplanes and Helicopters, Air Force Institute of Technology, Warsaw, Poland)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Publication date: 8 May 2018

Abstract

Purpose

The purpose of this paper is to present the methodology and approach adapted to conduct a wind tunnel experiment on the inverted joined-wing airplane flying model together with the results obtained.

Design/methodology/approach

General assumptions underlying the dual-use model design are presented in this paper. The model was supposed to be used for both wind tunnel tests and flight tests that significantly drive its size and internal structure. Wind tunnel tests results compared with the outcome of computational fluid dynamics (CFD) were used to assess airplane flying qualities before the maiden flight was performed.

Findings

Extensive data about the aerodynamic characteristics of the airplane were collected. Clean configurations in symmetric and asymmetric cases and also configurations with various control surface deflections were tested.

Practical implications

The data obtained experimentally made it possible to predict the performance and stability properties of the unconventional airplane and to draw conclusions on improvements in further designs of this configuration.

Originality/value

The airplane described in this paper differs from frequently analyzed joined-wing configurations, as it boasts a front lifting surface attached at the top of the fuselage, whereas the aft one is attached at the bottom. The testing technique involving the application of a dual-use model is also innovative.

Keywords

Citation

Cezary Galinski, Grzegorz Krysztofiak, Marek Miller, Pawel Ruchala, Marek Kalski, Mateusz Lis, Adam Dziubinski, Krzysztof Bogdanski, Lukasz Stefanek and Jaroslaw Hajduk (2018) "Wind tunnel tests of the inverted joined wing and a comparison with CFD results", Aircraft Engineering and Aerospace Technology, Vol. 90 No. 4, pp. 586-601

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DOI

: https://doi.org/10.1108/AEAT-11-2016-0195

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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