document

Appraisal of Wing Aerodynamic Design Methods for subsonic flight speed

Loeve, W. (author)

For a number of direct calculation methods for the prediction of flows around wings at subsonic speed, the basic assumptions are discxissed. This forms the basis of the demonstration of the applicability of the methods. Comparison of calculated pressvire distributions with results from windtunnel tests serve to illustrate this for three...

report 1984

document

CAD developments at the National Aerospace Laboratory NLR of the Netherlands

Loeve, W. (author), Klaasse, A.A.C. (author)

The NLR renders scientific support and technical assistance for the design and operation of aircraft and spacecraft. This concerns Dutch and foreign industries, aircraft and spacecraft operators, governmental organizations, and organizations that are active in aerospace research. Activities are undertaken also in technical fields that may...

report 1984

document

De invloed van CAD op research

Loeve, W. (author), van den Dam, R.F. (author)

NLR has developed an infrastructure of hardware and software for support of aerodynamic design of aircraft. Organizational and technical aspects of this development are described.

report 1983

document

CAD-systemen voor overdracht van kennis

Loeve, W. (author), van den Dam, R.F. (author)

The NLR in the Netherlands renders scientific support and technical assistance for the design and operation of aircraft and spacecraft. The approach of NLR can be characterized by integration of experimental and theoretical investigations. For this an integrated computer and terminal network has been developed that links both NLR laboratory...

report 1983

document

Het functioneren van een wiskundige in een instituut voor toegepast wetenschappelijk onderzoek

Loeve, W. (author)

Aan de hand van voorbeelden wordt aangegeven wat de bijdragen zijn van wiskundigen aan het vervullen van de taken van instellingen voor toegepast wetenschappelijk onderzoek. Daarbij wordt tevens ingegaan op de organisatorische aspecten.

report 1982

document

Een infrastruktuur voor stromingsberekeningen ten behoeve van computergesteund ontwerpen

Loeve, W. (author)

Computational fluid dynamics becomes an increasing important tool in the design process of aeroplanes, ships and cars. Wherever possible computational and experimental fluid dynamics are applied alternately in the design process. By means of techniques that are under development to support computer aided design, the problem must be solved to...

report 1982

document

De ingenieur in een instituut voor toegepast wetenschappelijk onderzoek

Loeve, W. (author)

In this paper aspects are discussed that determine the functioning of engineers in a research and development environment. Emphasis is put on multi-disciplinary activities in a matrix organization that are based in a good knowledge of mono-disciplines. It is indicated how the Technical University can improve some aspects of the education....

report 1978

document

The calculation of aerodynamic characteristics of wing-body combinations at subsonic flight speeds

Loeve, W. (author)

Surface panel methods and finite difference methods are reviewed with respect to the use in the design of aeroplanes. It is concluded that there is a need for inverse surface panel type methods to diminish the trial and error character of the design process. Finite difference methods based on transonic small perturbation theory have to be based...

report 1976

document

De wijze waarop wiskunde wordt gebruikt bij het onderzoek door het Nationaal Lucht- en Ruimtevaartlaboratorium

Loeve, W. (author)

In deze voordracht is gepoogd om aan te geven wat er wordt verwacht van het toepassen van wiskunde in het Nationaal Lucht- en Ruimtevaartlaboratorium NLR. Hierbij staat centraal dat de bepaling van de waarde van de toepassing van de wiskxinde plaatsvindt binnen niet-wiskundige technische disciplines. Na een beschrijving van de taken van het NLR...

report 1976

document

An hierarchic multi-suppliers computer network of a research laboratory with two settlements

Loeve, W. (author)

For the aerospace laboratory NLR in the Netherlands the considerations are discussed that formed the basis of along-term plan to realize an optimal computer network. In the optimization process up to now the laboratory switched from a situation in which in each of both settlements one central close shop computer centre was available to a...

report 1975

document

On the use of "panel methods" for predicting subsonic flow abour aerofoils and aircraft configurations

Loeve, W. (author), Slooff, J.W. (author)

With the availability of large capacity computers there is a tendency for potential flow calculations to play a more important role in the process of aircraft development. The possibility for accurate prediction of aerodynamic characteristics had been widely increased by the development of socalled "panel methods". These are based on the...

report 1971

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Development of a method for predicting wing pressure distributions in subsonic flow: report on an intermediate solution

Bleekrode, A.L. (author), Loeve, W. (author), Slooff, J.W. (author)

A method is described for predicting pressure distributions on wings in subcriticial attached flow. The method comprises the following basic elements. - linearized lifting surface theory the surface source panel method of Hess and Smith - approximate, uniformly valid, second-order corrections to be applied to the results of lifting surface...

report 1971

document

An approximate method for the calculation of the pressure distribution on wing-body combinations at subcritical speeds

Labrujere, T.E. (author), Loeve, W. (author), Slooff, J.W. (author)

Paper presented at the AGARD Specialist Meeting "Aerodynamic Interference", Silver Spring, Maryland , 28 - 30 September 1970

report 1970

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Computer programmes in use at NLR for the calculation of flow details around wing-body combinations at subsonic speeds

Loeve, W. (author)

.

report 1969

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Note concerning the standard method for predicting pressure distributions on swept wings in subsonic flow available at NLR

Loeve, W. (author)

report 1968

document

An approximate method for the determination of the pressure distribution on wings in the lower critical speed range

Labrujere, T.E. (author), Loeve, W. (author), Slooff, J.W. (author)

Tho design of aircraft for efficient flight at high subsonic speeds demands for methods by which the pressure distributions on wings can be predicted accurately. The present paper is concerned with an approximating method that is based on the fact that the main characteristics of subsonic flow about wings are described rather well by the...

report 1968

document

A digital computer programme for predicting pressure distributions on swept wings in subsonic flow according to a semi-empirical method

Loeve, W. (author), Bleekrode, A.L. (author)

A computer programme is presented for the application of a semi-empirical method, based on work from the Royal Aircraft Establishment, for calculation of the pressure distribution on wings in subsonic attached flow. A comparison of calculated results with results of experiments is made with the purpose to determine some of the boundaries of the...

report 1967

document

Calculated and measured pressure-distributions at subsonic speeds on a non-lifting wing, mounted on a body

Kramer, H. (author), Loeve, W. (author)

Pressure measurements on a non-lifting 55 swept wing-body combination have been performed at subsonic speeds in the 2.00x1.60 m2 high speed windtunnel (HST) of the National Aerorpace Laboratory ITLR, Amsterdam. The model for there tests has been made available by the Royal Aircraft Establishment at Farnborough. The results of these measurements...

report 1966

document

De berekening van drukverdelingen over de neuzen van F 28 vleugels, ten behoeve van de bepaling van de drukweeratand uit gemeten drukverdelingen.

Slooff, J.W. (author), Loeve, W. (author)

Aan laodellen van de Fokker F 28 zijn drukmetingen uitgevoerd ten behoeve van de bepaling van de verdeling van draagkracht en torsiemoment over de vleugel. Later is nagegaan of deze drukmetingen tevens zijn te gebruiken voor de bepaling van de verdeling van de weerstand. Hierbij is gebleken dat er een te gering aantal drukken op het voorste deel...

report 1966

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Beschouwingen over de rol van drukverdelings-berekeningsmethoden bij de vormgeving van vliegtuigvleugels voor hoog-subsone snelheden

Loeve, W. (author), Zandbergen, P.J. (author)

In this paper, a discussion is given of some of the aerodynamic difficulties involved in the design of wings for high-subsonic speeds, and of the theoretical methods available to calculate sub-critical pressure distributions. It appears that until now only one of these methods, being in fact a semi-emperical one, is developed far enough to be of...

report 1966