scholarly journals Preliminary Design Considerations for Variable Geometry Radial Turbines with Multi-Points Specifications

2017 ◽  
Author(s):  
Pierre-Thomas Lauriau ◽  
Nicolas Binder ◽  
Xavier Carbonneau ◽  
Sandrine Cros ◽  
Mathieu Roumeas
Keyword(s):  
Preliminary Design ◽  
Variable Geometry ◽  
Design Considerations ◽  
Radial Turbines

scholarly journals Preliminary Design Considerations for Variable Geometry Radial Turbines with Multi-Points Specifications

2018 ◽  
Vol 3 (4) ◽  
pp. 22
Author(s):  
Pierre-Thomas Lauriau ◽  
Nicolas Binder ◽  
Sandrine Cros ◽  
Mathieu Roumeas ◽  
Xavier Carbonneau
Keyword(s):  
Flow Diagram ◽  
Speed Ratio ◽  
Preliminary Design ◽  
Variable Geometry ◽  
Operating Range ◽  
Design Considerations ◽  
Radial Turbines ◽  
Nozzle Opening

Radial turbines’ preliminary designs are usually carried out through some dimensionless approaches, such as the loading-to-flow-diagram and/or the blade speed ratio. In case of variable nozzle radial turbines, multi-points specifications must be considered, related to the improvement of the operating range. As preliminary design correlations and standards usually taken into consideration arise from studies dedicated to fixed geometry radial turbines, they need to be updated with regard to nozzle off-design opening configurations. This paper provides some theoretical basics in order to help designers considering variable geometry problems. Some complementary elements about the dimensionless methods are given by taking into account the nozzle opening effect. Then, useful considerations are brought regarding the preliminary design of variable geometry radial turbines with multi-points specifications.

scholarly journals Advanced tokamak reactors based on the spherical torus (ATR/ST). Preliminary design considerations

1986 ◽  
Author(s):  
R.L. Miller ◽  
R.A. Krakowski ◽  
C.G. Bathke ◽  
C. Copenhaver ◽  
N.M. Schnurr ◽  
...  
Keyword(s):  
Preliminary Design ◽  
Spherical Torus ◽  
Design Considerations ◽  
Tokamak Reactors

Preliminary Design Analysis of a Catalytic Ceramic Structure in a Turbine Combustor

1981 ◽  
Vol 103 (2) ◽  
pp. 338-344
Author(s):  
W. S. Y. Hung ◽  
W. H. Dickson ◽  
S. M. DeCorso
Keyword(s):  
Steady State ◽  
Preliminary Analysis ◽  
Mechanical Analysis ◽  
Preliminary Design ◽  
Support Structure ◽  
Ceramic Structure ◽  
Analysis And Design ◽  
Design Considerations ◽  
Low Emission ◽  
Conceptual Designs

Analysis and design of a catalytic ceramic element and its support structure in a turbine combustor for low emission application have been performed. Preliminary analysis including a survey of literature has helped identify certain design considerations and conceptual designs of the catalytic ceramic element. A thermo-mechanical analysis of the major components in these conceptual designs has been performed for both steady-state and transient (shut-down) situations. Consequently, an arrangement to build a viable catalytic ceramic combustor element has been identified which is expected to perform its mechanical functions.

Application of Coandă Jet for Generating Lift of Micro Air Vehicles - Preliminary Design Considerations

2014 ◽  
Vol 629 ◽  
pp. 139-144 ◽  
Author(s):  
Riyadh Ibraheem Ahmed ◽  
Harijono Djojodihardjo ◽  
A.B.D. Rahim bin Abu Talib ◽  
Mohd Faisal Abd Hamid
Keyword(s):  
Micro Air Vehicles ◽  
Coanda Effect ◽  
Preliminary Design ◽  
Circulation Control ◽  
Engineering Applications ◽  
Design Considerations ◽  
Coandǎ Effect ◽  
Coanda Jet ◽  
The Relationship ◽  
Air Vehicles

Coandă effect, which has been widely utilized in many engineering applications for circulation control, is here reviewed for the design of Coandă Micro-Air-Vehicles (MAVs). Based on the review, a basic spherical configuration is analyzed to obtain the relationship between relevant parameters to the lift that can be produced based on fundamental principles. The results can be used for preliminary design purposes and are discussed in view of existing literature.

Preliminary Design Considerations and Feasibility of a Biomimicking Tissue-Engineered Vascular Graft

2000 ◽  
Author(s):  
Joel D. Stitzel ◽  
Gary L. Bowlin
Keyword(s):  
Vascular Graft ◽  
Large Diameter ◽  
Small Diameter ◽  
Preliminary Design ◽  
Bypass Grafts ◽  
Thrombotic Occlusion ◽  
Design Considerations ◽  
Blood Flow Velocities ◽  
Vascular Replacement ◽  
Compliance Mismatch

Abstract Development of an ideal vascular replacement has been addressed with increasing urgency in recent years. To date, appropriate replacements for only large diameter bypass grafts have been realized, employing the use of Dacron and expanded polytetrafluoroethylene. A solution for small diameter (<6 mm I.D.) vessel bypass, however, has not yet been found. This is due mainly to acute thrombotic occlusion and chronic anastomotic hyperplasia that is introduced into these grafts due to the low blood flow velocities experienced by smaller caliber vessels and compliance mismatch between prosthetic and native vessel, respectively [1].

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