Evaluation of measured-boundary-condition methods for 3D subsonic wall interference

Measurements on a simple aircraft model in both an appropriately sized and a relatively large, low-speed, solid-wall test section were used to analyse the accuracy and consistency of measured-boundary-condition (MBC) methods. For completeness, the classical method of images, with two different correction procedures, was also analysed. For the...

Wind tunnel influence considering 2D high lift configurations

The present paper describes two alternative correction methods for wall interference based on measured boundary conditions. In both methods it is assipied that at or near the tunnel boundary the flow velocity will be measured in magnitude and direction and that the main part of the flow field may be considered irrotational and subsonic. One...

A review of research at NLR on wind-tunnel corrections for high angle of attack models

A survey is given of past, current and planned work at NLR in the field of wind-tunnel wall interference on models at high angles of attack at lowsubsonic speeds. Among the new long-term research activities those concerning slotted-wall test sections play a dominant part. It is felt that an approach which makes use of measured distrihutions of...

Evaluation of Thing's method for the calculation of the lift discription on a wing in propulsive jets

The calculation method presented by Ting, Liu and Kleinstein in reference 3 has been subjected to an evaluation study, principally on the basis of experimental data obtained from special experiments on a half wing immersed in two jets. Very satisfactory results were found for the unflapped wing lying centrally within the jets. Both flap...

Evaluation of Levinsky's method for the calculation of the lift distribution on a wing in propulsive jets

Based on comparison with results from special experiments, an evaluation has been performed of the method of Levinsky, Thommen, Yager and Holland, which is intended to calcxilate the spanwise lift distribution on wings immersed in propulsive jets. Various modifications of the original method have been investigated. It was found that the method,...

Experimental investigation of the aerodynamic characteristics of a wing propulsion jets

With the intent to test the qualities of the theoretical models used in two different calculation methods, pressure distributions have been measured on a simple half model wing-in-jet combination. The position of the jets relative to the wing was varied, mainly in a plane perpendicular to the span. Jet velocities of 1, 2 and 3 times the tunnel...

Calculation of the lift distribution on a wing in jets or slipstreams using Ting's method

A numerical investigation of the analysis of Ting, Liu and Kleinstein has been performed, in order to obtain a better insight into the properties and possibilities of this method for application to wings immersed in propulsive jets, It is expected that Ting's method will turn out to be a valuable tool for the prediction of the spanwise lift...

Voorstellen betreffende de toepassing van de eindige elementen-methode op enkele vliegtuig-aerodynamische problemen

Voorstel voor een nieuwe lage-snelheid windtunnel voorzien van een meetplaats van 8x6 m. Deelrapport 1: Keuze van de afmetingen van de meetplaats