A Joint Computational Fluid Dynamics and Experimental Fluid Dynamics Test Program

Tyler, Charles

doi:10.2514/6.2004-877

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…2.1 Aerodynamic/structural optimization For the high-speed wind-tunnel tests, the test models usually meet higher aerodynamic loads than at low speeds. Therefore, to meet the strength and stiffness requirements is very significant for the RP wind-tunnel models based on photopolymer-resin (Hague et al, 2004;Tyler et al, 2005;Wohlers, 2006;Tyler, 2004). The combination of aerodynamic and structural analysis can be utilized to validate if the structural design of the RP models can meet experimental requirements (Jordan et al, 2003;Hildebrand et al, 2003b;Tyler et al, 2004).…”

Section: Design and Manufacture Methodologymentioning

confidence: 99%

“…Therefore, to meet the strength and stiffness requirements is very significant for the RP wind-tunnel models based on photopolymer-resin (Hague et al, 2004;Tyler et al, 2005;Wohlers, 2006;Tyler, 2004). The combination of aerodynamic and structural analysis can be utilized to validate if the structural design of the RP models can meet experimental requirements (Jordan et al, 2003;Hildebrand et al, 2003b;Tyler et al, 2004). Aerodynamic loads on the models are obtained by computational fluid dynamics (CFD), and the loads are utilized to accomplish strength, stiffness and vibration calibration by computational structure dynamics (CSD).…”

Section: Design and Manufacture Methodologymentioning

confidence: 99%

“…At last, further design optimization of the product is carried out according to the above analyzed results. The processing is wasteful in work efficiency and effect (Tyler et al, 2004). In the paper, the design method based on sharing mesh database is a feasible depending on current advanced computers and high efficient computational capability.…”

Section: Model Structural Designmentioning

confidence: 99%

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Design and manufacture methods of rapid prototyping wind‐tunnel models based on photopolymer‐resin

Yang

Sun

Zhang

et al. 2013

Rapid Prototyping Journal

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Purpose -The purpose of this paper is to present a novel method to design and manufacture rapid prototyping (RP) lightweight photopolymer-resin models for wind-tunnel tests. This method can ensure the structural configuration similarity considering model deformation under aerodynamic loads. Design/methodology/approach -Photopolymer-resin based on RP technique was used to fabricate DLR-F4 models. Testing in a subsonic and transonic wind tunnel was carried out and the test results were compared to analyze performance predictions. Findings -RP photopolymer-resin wind-tunnel models fabricated by the design methods yielded satisfactory aerodynamic performance. The methods can decrease the model's weight and prevent resonance occurrence among the models, wind-tunnel, and support system, shorten the processing period, and lead to decrease in manufacturing period and cost. Research limitations/implications -Stiffness shortage of the thin components, such as wing tip, often leads to deformation occurrence under aerodynamic loads in transonic wind-tunnel tests, which has significant influence on aerodynamic characteristics of the test models. Therefore, model deformation should be taken into account in the design process. Originality/value -This design and manufacture method, aerodynamic and structural combination design and structural optimization, can obtain RP lightweight photopolymer-resin wind-tunnel models for satisfactory aerodynamic performance, which makes RP techniques more practical for manufacturing transonic wind-tunnel test models, considering deformation induced by aerodynamic forces such as lift force. The methods also present an inexpensive way to test and evaluate preliminary aircraft designs, in both academia and industry. Nomenclature and abbreviationsThe current issue and full text archive of this journal is available atThe authors thank Pro LI Di-chen for many helpful comments, and for suggesting the theoretical analysis and RP model design optimization. The authors thank Xi'an Jiao Tong University for giving some help in model design and manufacturing,

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Section: Design and Manufacture Methodologymentioning

confidence: 99%

Section: Design and Manufacture Methodologymentioning

confidence: 99%

Section: Model Structural Designmentioning

confidence: 99%

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Design and manufacture methods of rapid prototyping wind‐tunnel models based on photopolymer‐resin

Yang

Sun

Zhang

et al. 2013

Rapid Prototyping Journal

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“…Other measurement results on this model are reported by Tyler. 34 PDV Measurements were taken at five measurement planes (measured along the model surface relative to the wing/body junction) as shown on Figure 12. For the data presented here the trailing edge control surface was set at positive 20 degrees with the control surface deflected up.…”

Section: B Boeing Unmanned Combat Air Vehiclementioning

confidence: 99%

Evaluation and Optimization of a Multi-component Planar Doppler Velocimetry System

Elliott

Crafton

Baust

et al. 2005

43rd AIAA Aerospace Sciences Meeting and Exhibit

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A Planar Doppler Velocimetry system has been developed for multi-component velocity measurements in large scale subsonic wind tunnel facilities. System components, methodologies and improvements are evaluated and discussed. Data is presented on two component measurements conducted in the flow field above a 70 degree delta wing at an angle of attack of 23 degrees in a Mach 0.2 (69 m/s) free stream. Although only two components of velocity could be resolved, axial and spanwise measurements were made characterizing the velocity field associated with the vortex cores as they developed downstream. Detector placement and system performance was improved in a second test to measure the three dimensional velocity field above a Boeing UCAV model again at 20 degrees angle of attack operated in a Mach 0.2 free stream. The evolution of the three dimensional velocity field created by vortices from the sharp leading edge of the body and the outboard vortex above the wing was characterized. Further optimization of the current system indicated that current levels of uncertainty can be improved by proper camera placement to reduce the sensitivity to laser frequency fluctuations and by improving the linear independence of the measured velocity components as characterized by the condition number of the coefficient matrix. Other considerations of camera placement and considerations to make measurements are also discussed.

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“…aerodynamic force and moments, pressure sensitive paint, and deflection using Moiré Interferometry) of the flow field around the model. 31 The long term goal of this study is to develop new tools so that CFD and experiments utilizing rapid prototype manufacturing techniques can be combined more efficiently to investigate future aircraft designs. Measurements were taken at five measurement planes (measured along the model surface relative to the wing/body junction) as shown on Figure 5.43.…”

Section: Boeing Ucav Modelmentioning

confidence: 99%

Filtered Rayleigh Scattering Velocimetry for Wind Tunnel Applications

Crafton¹,

Elliott²,

Carter³

et al. 2004

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A Joint Computational Fluid Dynamics and Experimental Fluid Dynamics Test Program

Cited by 8 publications

References 8 publications

Design and manufacture methods of rapid prototyping wind‐tunnel models based on photopolymer‐resin

Design and manufacture methods of rapid prototyping wind‐tunnel models based on photopolymer‐resin

Evaluation and Optimization of a Multi-component Planar Doppler Velocimetry System

Filtered Rayleigh Scattering Velocimetry for Wind Tunnel Applications

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