Published February 8, 1978 | Version v1
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Super-cavitating wings with a 'wetted' suction side in a plane flow

Creators

Description

The aim of this study is to develop a method of calculation to restore, for various operating conditions, the characteristics of a super-cavitating wing profile with a wetted (and truncated rear part) suction side. The paper starts with a theoretical part where the method of calculation is described, beginning with an examination of the main previous studies followed by a presentation of the principles that allow for the complete formulation of the problem, and then the calculations. Some analytical developments have been placed in the appendix, as well as the details of some methods which make it possible to remove the numerical difficulties. The studied profile is of a rounded leading edge and the extrados (suction side) has a length different from that of the intrados (front side); such a free parameter allows to set the detachment point of the upper cavity. The description of the profile is given in Chapter II. The second part is an experimental one where the test configuration is briefly described; some experimental results are presented and the results are compared with the theory

Abstract (French)

Cette etude consiste a developper une methode de calcul pour restituer, pour des conditions variees de fonctionnement, les caracteristiques d'un profil supercavitant a extrados mouille et arriere tronque. Notre expose se divise en deux parties: - Une partie theorique ou nous decrivons la methode de calcul utilisee. Cette partie commence par un examen des principales etudes anterieures: nous situons le contexte dans lequel se place notre etude et nous essayons d'en faire ressortir l'interet. Nous exposons ensuite les principes retenus qui permettent la formulation complete du probleme puis nous developpons les calculs dans les paragraphes 3 et 4 du chapitre II. Certains developpements analytiques dont la presentation aurait alourdi le texte ont ete places en annexe, ainsi que le detail de quelques methodes qui permettent de lever les difficultes numeriques. Nous avons choisi d'etudier un profil a bord d'attaque arrondi dont l'extrados a une longueur differente de celle de l'intrados. On dispose ainsi d'un parametre libre fixant le point de detachement de la cavite superieure, mais cette particularite n'est pas sans creer certaines difficultes sur le plan experimental. La description du profil est donnee dans le paragraphe 2 du meme chapitre II. - Une partie experimentale ou nous decrivons brievement le moyen d'essai. Nous presentons certains resultats experimentaux concernant le profil defini precedemment au chapitre II, et nous comparons avec la theorie

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Additional details

Additional titles

Original title (French)
Ailes supercavitantes a extrados mouille en ecoulement plan

Identifiers

URL
http://www.iaea.org/inis/Contacts/;

Publishing Information

Imprint Pagination
168 p.
Report number
FRNC-TH--10477

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
50064703
Subject category
S42: ENGINEERING; S97: MATHEMATICAL METHODS AND COMPUTING;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
CALCULATION METHODS; CAVITATION; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; FLOW MODELS; FLUID FLOW; HYDRODYNAMICS; LIQUID FLOW; MEASURING METHODS; SHIPS; THREE-DIMENSIONAL CALCULATIONS; TURBULENCE
Descriptors DEC
EVALUATION; FLUID FLOW; FLUID MECHANICS; MATHEMATICAL MODELS; MECHANICS; SIMULATION

Optional Information

Notes
111 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS-NKM website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/; Also available from Bibliotheques Universitaires Grenoble Alpes 1130 avenue Centrale 38400 Saint-Martin-d'Heres (France)