THREE-DIMENSIONAL ANALYSIS OF TURBINE ROTOR FLOW INCLUDING TIP CLEARANCE

A 3D Navier-Stokes investigation of a high pressure turbine rotor blade including tip clearance effects is presented. The 3D Navier-Stokes code developed at ONERA solves the three-dimensional unsteady set of mass-averaged Navier-Stokes equations by the finite volume technique. A one step Lax-Wendroff type scheme is used in a rotating frame of reference. An implicit residual smoothing technique has been implemented, which accelerates the convergence towards the steady state. A mixing length model adapted to 3D configurations is used. The turbine rotor flow is calculated at transonic operating conditions. The tip clearance effect is taken into account. The gap region is discretized using more than 55,000 points within a multi-domain approach. The solution accounts for the relative motion of the blade and casing surfaces. The total mesh is composed of five sub-domains and counts 710,000 discretization points

Assessment of jet-wake flow structures induced by three-dimensional hub wall contouring

International audienc

Application des calculs Navier-Stokes a l'aerodynamique des turbines et des compresseurs

30"eme colloque d'aerodynamique appliquee : utilisation des calculs 'Navier-Stokes' pour les applications, Nantes (France), 25-27 octobre 1993SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1994 n.17 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Supersonic stator-rotor interaction in a turbine stage

Extrait de : 6th International symposium on unsteady aerodynamics, aeroacoustics and aeroelasticity of turbomachines and propellers, University of Notre-Dame, IN (USA), September 15-19, 1991SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1991 n.166 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Utilite de la validation du code CANARI sur le cas du banc experimental de compresseur ERECA

Communication to : 32eme Colloque d'aerodynamique appliquee, Lyon (France), 25-27 mars 1996SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1996 n.72 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Technical solutions for the accessibility of web sites: a current preoccupation for the disabled persons

International audienceThe accessibility of buildings to everyone is a fundamental right today. For already 15 years, the access to establishments or collective houses is regulated as shows the French decree 94.86 of January 26th, 1994 defining which types of statutory arrangements must be applied. It is a precursor decree to the law of February, 2005, which law imposes the stake in conformity of all the public access buildings. But buildings are not the only place where the disabled person is confronted with the problem of the accessibility. The internet, which has become today a fundamental communication tool for the access to the information and the freedom of expression, is still inaccessible under many points to the disabled persons. With the aim of remedying these lacks in accessibility, our work consists in drawing up a list of the handicap problems met by a disabled person and trying to associate it material and software technical solutions to compensate for these problems. Face to navigation on a website, the problems stressing the handicap of the person (and sometimes creating new ones) are many. We can quote two examples among the most classical: - A website which contains too much information on the same page, in a non-hierarchical basis or too bushy way, does not allow a visual deficient person to navigate serenely and effectively. A solution can then consist in acting on the shape of the navigation within the site itself and in simplifying the searches for keywords and the access to the various links. - For a person with a motor disability problem which can move only parts of his body, a specialised software has to be used. The examples are many as the EXTREME HEADMOUSE (movement of the mouse thanks to the movements of the head) or the EYEGAZE (movement of the mouse thanks to the movements of eyes). Our approach has been to be put in the situation of the disabled person to better evaluate the engendered trouble or lack and look for the most adequate solutions. We leaned for that on the current legislation and on the latest available material and software technologies of information and communication. After the establishment of a catalogue of technical equipments which role is intended to assist the internet website navigation, the objective is the creation of a test website implementing some of the chosen solutions. The evaluation will be made by persons with varied handicaps. The results will be presented at the conference

New abilities of the multiapplication elsA software in the field of turbomachinery flow computation

Communication to : 2002 joint US ASME-European fluid engineering summer conference : forum of high speed jet flows, Montreal (Canada), July 14-18, 2002SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Comparison of steady and unsteady 3D viscous flow computations through a transonic turbine stage

Communication to : 13th International symposium on airbreathing engines (ISABE), Chattanooga (USA), September 07-12, 1997SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1997 n.147 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Turbomachinery flow simulations using elsA software : steady validations and first abilities for unsteady computations

Communication to : 38th AIAA/ASME/SAE/ASEE joint propulsion conference and exhibit, Indianapolis (USA), July 07-10, 2002SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.2002 n.132 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc