Compressor stage
Description of the unsteady flow pattern from peak efficiency to near surge in subsonic centrifugal compressor stage
... the compressor stage; (b) Performance of the decoupled components Figure ...the stage as a function of the corrected mass flow for steady and unsteady simulations ...the compressor may exhibit ...
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Prediction of the unsteady turbulent flow in an axial compressor stage. Part 2: Analysis of unsteady RANS and LES data
... rotor and stator parts. The paper is organized in five sections. In the first one, a summary of the compressor test case is presented along with the nu- merical method. The second section proposes an analysis of ...
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Characterization of unsteady flow processes in a centrifugal compressor stage
... Because the 2D model includes the unsteadiness associated with the interaction of the diffuser inlet static pressure disturbance with the upstream rotating impeller, it is used to identi[r] ...
137
Prediction of the unsteady turbulent flow in an axial compressor stage. Part 1: Comparison of unsteady RANS and LES with experiments
... and LES formalisms, to predict the unsteady turbulent flow in an axial com- pressor stage. For both approaches, the geometry takes into account for the whole 3D flow (including rotor tip clearance) and the real ...
42
Active control of rotating stall in a transonic compressor stage with inlet distortion
... The performance of a MIMO H, controller based on the zeroth and first harmonic model was also investigated and the results showed only little reduction in stalling [r] ...
103
Characterization of performance-limiting flow mechanisms in a centrifugal compressor stage
... These effects-leading edge boundary layers, secondary flows, and local flow accelera- tions-are all present in the diffuser inlet and are most pronounced at high a[r] ...
270
Multiple-Frequency Phase-Lagged Unsteady Simulations of Experimental Axial Compressor
... mental compressor stage CREATE investigated at École Centrale de Lyon in the LMFA laboratory ...axial compressor from Société Nationale d'Etudes et de Construction de Moteurs d'Aviation (SNECMA) is ...
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Low-Cost Rotating Experimentation in Compressor Aerodynamics Using Rapid Prototyping
... the compressor inlet conditions used for correcting the mass flow ( ̇𝑚 𝑐 ) and rotational speed (𝑁 𝑐 ...axial stage and the entire two-stage compressor, ...
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Le stage femme enfant
... évaluation aura lieu lors du dernier mois de stage . Des apprentissages de l'étudiant : L'évaluation des compétences s'infère . Il faut que les évaluations se répètent pour que l'étudiant puisse savoir à quel ...
5
Applications of axial and radial compressor dynamic system modeling
... The third project is the investigation of unsteady impeller-diffuser interaction effects on compressor stability. First, the unsteady blade-row interaction in axial co[r] ...
262
Centrifugal compressor return channel shape optimization using adjoint method
... This thesis describes the use of an adjoint method in an automated gradient-based optimization process for return channel design. With reducing losses as the goal [r] ...
60
Computational simulation of unsteady flow in transonic compressor rotor
... Consequently, a steady state approximation to the Navier-Stokes equations will never fully converge, the error locations being predominantly near the shedding location[r] ...
131
Computational study of rotating stall in high-speed compressor
... While the work constituted a first attempt on using body force representations of blade rows to simulate instability behavior in a high-speed single stage compresso[r] ...
101
Design method for centrifugal compressor and centripetal turbine impellers
... single stage is being eXploited fully at the present ...ratios, compressor and turbine impellers are highly stressed and the trend has been toward impellers with straight radial ...single stage ...
194
Design of an active compressor blade for aeroelastic studies
... A finite element model (FEM) of the Active Rotor was used to predict the stresses in the composite spar due to centrifugal loads, the blade tip deflection availa[r] ...
140
Convention de stage avec une institution
... LL A CONVENU CE QUI SUIT Article 1 : La présente convention a pour objet de définir les conditions dans lesquelles l’interne inscrit à la faculté de médecine de Poitiers et effectuant son stage auprès du praticien ...
2
Rapport de stage (jounalistique)
... Ce stage d'information a été effectué dans un laboratoire de la faculté de S T Jérôme du 10/06/91 au ...mon stage s'est déroulé dans un groupe de ...
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Opinions des maitres de stage des universités sur la filière universitaire de médecine générale et la maîtrise de stage
... du stage chez le médecin généraliste, aussi bien sur l’envie de devenir généraliste après le stage de deuxième cycle que sur la diminution de l’appréhension à exercer ou sur le projet ...
63
Innovative fan design for both high compressor and windmilling performance
... Design efforts aimed at: - suppressing the mixed local behaviour at the boundary between the compressor and turbine modes; - reducing negative incidences on both rotor and stator, typica[r] ...
9
Operating heterogeneities in a PEM Electrochemical Hydrogen Compressor
... In this study, the local behavior of an electrochemical hydrogen compressor (EHC) was investigated. A local dehydration of the polymer electrolyte membrane (PEM) was experimentally observed, due to the unbalanced ...
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