Mathematical Modeling of Wind-Speed Transients in Wind Tunnels

Rennie, R. Mark; Sutcliffe, P.; Vorobiev, Alexander; Cain, Alan B.

doi:10.2514/6.2013-1024

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…This term can be solved explicitly by integrating with respect to time, such that the mass flow rate in response to a fan speed acceleration changes as a function of both time and position around the wind-tunnel circuit. Examples of this kind of solution for several different closed-circuit wind tunnels are given in [1,9,10].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…(11)] and by a full integration of Eq. (9), for the fastest possible wind-speed acceleration from 0 to 30 m∕s in the wind tunnel examined in [10] and used in this investigation. These two computations produced almost identical results, and both computations matched the measured fan power within experimental error.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…For further information on a full comparison between Eq. (9) and the behavior of a wind tunnel during an acceleration, the reader is referred to [10], which shows that an accurate simulation of the wind speed in the wind tunnel during the acceleration requires a full integration of Eq. (9); however, as shown here, for the purpose of computing the fan heat input, the difference between Eqs.…”

Section: Mathematical Modelmentioning

confidence: 99%

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Mathematical Modeling of Wind-Tunnel Thermal Behavior

Rennie

Sutcliffe

Vorobiev

et al. 2015

Journal of Thermophysics and Heat Transfer

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The development from basic fluid-mechanic equations of a mathematical model for the thermal behavior of a closed-circuit wind tunnel is presented. As part of the model development, various parameters such as total pressure loss factors and heat transfer coefficients are identified that are required by the mathematical model to produce a high-fidelity simulation of the behavior of an actual wind tunnel. Techniques for the measurement of these parameters, as well as results for a subsonic closed-circuit wind tunnel, are presented. After incorporating these experimentally measured parameters into the mathematical model, the model is shown to predict wall and air temperatures in the actual wind tunnel to within experimental accuracy for both static and dynamic testing.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

See 1 more Smart Citation

Mathematical Modeling of Wind-Tunnel Thermal Behavior

Rennie

Sutcliffe

Vorobiev

et al. 2015

Journal of Thermophysics and Heat Transfer

Self Cite

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“…A model for the thermal behaviour of a subsonic wind tunnel [16] was used to control temperature in the actual wind tunnel [17]. A model that deals with the short-time-scale changes in pressure and other flow parameters in response to changes in control inputs was developed and validated via comparison with experimental measurements [18].…”

Section: Introductionmentioning

confidence: 99%

Model-based stagnation pressure control in a supersonic wind tunnel

Ilić¹,

Miloš²,

Milosavljević³

et al. 2016

FME Transaction

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The flow parameters control in wind tunnels is an area of intense research in recent years, with the aim of improving quality and efficiency of the wind tunnel operation. In this paper, an attempt is made to contribute to a better understanding of the stagnation pressure control in supersonic blowdown-type facilities. The stagnation pressure control strategy in the VTI Belgrade T-38 wind tunnel is discussed. An improved mathematical model for a supersonic wind tunnel is suggested and applied to the T-38 facility. Comparisons of simulation and experimental data are made to demonstrate accurate prediction of the facility response in supersonic flow conditions by the mathematical model. The model is used to incorporate a modified feedforward control in the original T-38 wind tunnel control system. The actual wind tunnel tests confirm model-predicted decrease of flow stabilization time and increase of available measurement time, bringing significant improvement in the wind tunnel operation efficiency.

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A review of modeling, simulation, and control technologies of altitude ground test facilities for control application

Pei

Liu

et al. 2023

Chinese Journal of Aeronautics

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Mathematical Modeling of Wind-Speed Transients in Wind Tunnels

Cited by 9 publications

References 3 publications

Mathematical Modeling of Wind-Tunnel Thermal Behavior

Mathematical Modeling of Wind-Tunnel Thermal Behavior

Model-based stagnation pressure control in a supersonic wind tunnel

A review of modeling, simulation, and control technologies of altitude ground test facilities for control application

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