A new large wind tunnel for civil-environmental and aeronautical applications

Diana, Giorgio; Ponte, S. De; Falco, M.; Zasso, Alberto

doi:10.1016/s0167-6105(98)00050-6

Cited by 18 publications

(12 citation statements)

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“…Diana et al [13] establishes the non-uniformity and turbulence behavior of mean velocity inside the test-section of a wind tunnel designed for civil and aeronautical applications. The findings have depicted that both non-uniformity and turbulence were recorded under 2% in the civil test-section, while the smaller test-section used in aeronautics recorded non-uniformity and turbulence values of under 0.2%.…”

Section: Previous Related Workmentioning

confidence: 99%

CFD and Experimental Study on the Effect of Progressive Heating on Fluid Flow inside a Thermal Wind Tunnel

et al. 2015

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A detailed Computational Fluid Dynamics (CFD) and experimental investigation into characterizing the fluid flow and thermal profiles in a wind tunnel was carried out, highlighting the effect of progressive heating on the non-uniformity flow profile of air. Using controllable electrical heating elements, the operating temperatures in the test-section were gradually increased in order to determine its influence on the subsequent velocity and thermal profiles found inside the test-section. The numerical study was carried out using CFD FLUENT code, alongside validating the experimental results. Good correlation was observed as the comparison yielded a mean error of 6.4% for the air velocity parameter and 2.3% for the air temperature parameter between the two techniques. The good correlation established between the numerically predicted and experimentally tested results identified broad scope for using the advanced computational capabilities of CFD applicable to the thermal modeling of wind tunnels. For a constant temperature process, the non-uniformity and turbulence intensity in the test section was 0.9% and 0.5%, which is under the recommended guidelines for wind tunnels. The findings revealed that the increase in temperature from 20 °C to 50 °C reduced the velocity by 15.2% inside the test section. OPEN ACCESSComputation 2015, 3 510

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Section: Previous Related Workmentioning

confidence: 99%

CFD and Experimental Study on the Effect of Progressive Heating on Fluid Flow inside a Thermal Wind Tunnel

et al. 2015

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“…Hence the flow quality in the test section must meet the standards for wind engineering studies. (11) is positioned in the test section (12) which has a square cross-sectional area of 0.5 x 0.5 m 2 and a length of 1 m. Downstream of the test section is the diffuser section (13) which decelerates the flow in order to minimise the loss of flow kinetic energy. Particular effort is made to avoid flow separation in the diffuser, which can significantly reduce the overall performance of the wind tunnel [16][17][18].…”

Section: Wind Tunnel Facilitymentioning

confidence: 99%

A validated design methodology for a closed-loop subsonic wind tunnel

Calautit

Chaudhry

Hughes

et al. 2014

Journal of Wind Engineering and Industrial Aerodynamics

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A systematic investigation into the design and simulation of flow parameters in a closed-loop wind tunnel was carried out using Computational Fluid Dynamics (CFD). The analytical model for estimating pressure losses were directed as input boundary conditions. Full-scale model of the entire wind tunnel was considered instead of the conventional approach, in which only test section flow is simulated. This allowed for optimisation of flow quality not only in the test section but also the flow in the entire circuit. Analysis of the guide vane configurations showed that test section flow quality was more affected by flow conditions in upstream than downstream sections. Hence, special attention must be given while designing the vanes at upstream turns particularly corners in line with the test section. Validation of the test section with block model showed that CFD was able to replicate wind tunnel measurements of velocity, turbulence intensity and pressure coefficient with error below 10%. Keywords

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“…Wind-loading vectors (F x , F y , and T) lumped at the position of floors are obtained from wind tunnel tests conducted at the wind tunnel of Politecnico di Milano [23] on a scaled 1 : 100 rigid model of the tower. The wind profile represents a typical urban terrain, as shown in Figure 2.…”

Section: Modeling Of the Buildingmentioning

confidence: 99%

Proposed Configurations for the Use of Smart Dampers with Bracings in Tall Buildings

Aly

Zasso

Resta

2012

Smart Materials Research

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This paper presents wind-induced response reduction in a very slender building using smart dampers with proposed bracingslever mechanism system. The building presents a case study of an engineered design that is instructive. The paper shows that shear response and flexural response of tall buildings present two very different cases for vibration suppression. Smart dampers are implemented optimally in the building to reduce its response in the lateral directions for both structural safety and occupant comfort concerns. New bracings-lever mechanism configurations are proposed for the dampers to improve their performance. The study shows how the proposed configurations can enable application to flexural response and scenarios where the interstory drift is not enough for dampers to work effectively. In addition, a decentralized bang-bang controller improved the performance of the smart dampers.

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A new large wind tunnel for civil-environmental and aeronautical applications

Cited by 18 publications

References 0 publications

CFD and Experimental Study on the Effect of Progressive Heating on Fluid Flow inside a Thermal Wind Tunnel

CFD and Experimental Study on the Effect of Progressive Heating on Fluid Flow inside a Thermal Wind Tunnel

A validated design methodology for a closed-loop subsonic wind tunnel

Proposed Configurations for the Use of Smart Dampers with Bracings in Tall Buildings

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