Low Speed Aerodynamic Study of Full-Scale High-Fidelity Runback Ice Shapes

2011 ◽  
Author(s):  
Nathalie Alegre ◽  
David Hammond
Keyword(s):  
Full Scale ◽  
High Fidelity ◽  
Low Speed ◽  
Ice Shapes

The Application of Non-Axisymmetric Endwall Contouring in a Single Stage, Rotating Turbine

2009 ◽  
Author(s):  
Glen Snedden ◽  
Dwain Dunn ◽  
Grant Ingram ◽  
David Gregory-Smith
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Pressure Gradient ◽  
Full Scale ◽  
Secondary Flows ◽  
Tip Clearance ◽  
Detailed Understanding ◽  
Low Speed ◽  
Endwall Contouring ◽  
Probe Measurements

As turbine manufacturers strive to develop machines that are more efficient, one area of focus has been the control of secondary flows. To a large extent these methods have been developed through the use of computational fluid dynamics and detailed measurements in linear and annular cascades and proven in full scale engine tests. This study utilises 5-hole probe measurements in a low speed, model turbine in conjunction with computational fluid dynamics to gain a more detailed understanding of the influence of a generic endwall design on the structure of secondary flows within the rotor. This work is aimed at understanding the influence of such endwalls on the structure of secondary flows in the presence of inlet skew, unsteadiness and rotational forces. Results indicate a 0.4% improvement in rotor efficiency as a result of the application of the generic non-axisymmetric endwall contouring. CFD results indicate a clear weakening of the cross passage pressure gradient, but there are also indications that custom endwalls could further improve the gains. Evidence of the influence of endwall contouring on tip clearance flows is also presented.

scholarly journals Full-scale self-propulsion simulation with a discretized propeller

2021 ◽  
Vol 4 (398) ◽  
pp. 15-23
Author(s):  
Zhang Qingshan ◽  
◽  
Chen Weimin ◽  
Du Yunlong ◽  
Dong Guoxiang ◽  
...  
Keyword(s):  
Boundary Layer Thickness ◽  
Polynomial Interpolation ◽  
Flow Characteristics ◽  
Uncertainty Assessment ◽  
Full Scale ◽  
The Self ◽  
High Fidelity ◽  
Cfd Simulations ◽  
Towing Tank ◽  
Grid Application

A comparison between towing tank testing and full-scale CFD simulations is presented at three different target speeds. For the current self-propulsion simulation, the self-propulsion point was obtained using polynomial interpolation. The studies of boundary layer thickness, a basic grid uncertainty assessment and verification were performed to give some confidence of grid application to current self-propulsion simulation. All simulations are performed using a commercial CFD software STAR-CCM+. It is concluded that with high-fidelity numerical methods, it’s possible to treat hull roughness and directly calculate full-scale flow characteristics, including the effects of the free surface, none-linearity, turbulence and the interaction between propeller, hull and the flow field.

Numerical Simulation of Icing on the Rotating Blade

2015 ◽  
Author(s):  
Wei Dong ◽  
JianJun Zhu ◽  
Rui Wang ◽  
Yong Chen
Keyword(s):  
Collection Efficiency ◽  
Numerical Study ◽  
High Fidelity ◽  
Ice Accretion ◽  
Blade Surface ◽  
Physical Processes ◽  
Ansys Fluent ◽  
Rotating Blade ◽  
Process Simulations ◽  
Ice Shapes

The physical processes involved in ice accretion on the rotating blade are complex. It is important to develop high fidelity numerical method and simulate the icing process on the blade under icing conditions. This paper presents a numerical study on the icing process on the rotating blade. The flow field around the blade is obtained using ANSYS FLUENT. The trajectories of supercooled water droplets and the collection efficiency are calculated by Eulerian approach. Heat and mass balance on the rotating blade surface is taken into account in icing process simulations. The NASA Rotor 67 blade is chosen as the computational model. The collection efficiency on the blade surface is computed and the impingement characteristics are analyzed. The 3D icing accretion on Rotor 67 blade is predicted at design point. The ice shapes of accretion time of 5s, 10s and 15s are simulated and the ice shapes at different span positions of the rotating blade are compared.

Response of lower limb in full-scale car–pedestrian low-speed lateral impact – influence of muscle contraction

2009 ◽  
Vol 14 (4) ◽  
pp. 339-348 ◽  
Author(s):  
Anurag Soni ◽  
Anoop Chawla ◽  
Sudipto Mukherjee ◽  
Rajesh Malhotra
Keyword(s):  
Muscle Contraction ◽  
Lower Limb ◽  
Full Scale ◽  
Lateral Impact ◽  
Low Speed

scholarly journals Randomised comparison of Enk™ and Manujet™ for emergency tracheal oxygenation with a high-fidelity full-scale simulation

2020 ◽  
Vol 39 (6) ◽  
pp. 807-812
Author(s):  
Corinne Lejus-Bourdeau ◽  
Nicolas Grillot ◽  
Ségolène Dupont ◽  
Vincent Robert-Edan ◽  
Olivier Bazin ◽  
...  
Keyword(s):  
Full Scale ◽  
High Fidelity

Full-Scale Experimental Validation of High-Fidelity Wireless Measurement on a Historic Truss Bridge

2011 ◽  
Vol 14 (1) ◽  
pp. 93-101 ◽  
Author(s):  
Shinae Jang ◽  
Billie F. Spencer ◽  
Jennifer A. Rice ◽  
Zhihao Wang
Keyword(s):  
Experimental Validation ◽  
Full Scale ◽  
High Fidelity ◽  
Wireless Measurement ◽  
Truss Bridge

Effect of High-Fidelity Ice-Accretion Simulations on Full-Scale Airfoil Performance

2010 ◽  
Vol 47 (1) ◽  
pp. 240-254 ◽  
Author(s):  
Andy P. Broeren ◽  
Michael B. Bragg ◽  
Harold E. Addy ◽  
Sam Lee ◽  
Frédéric Moens ◽  
...  
Keyword(s):  
Full Scale ◽  
High Fidelity ◽  
Ice Accretion
Sign in / Sign up

Export Citation Format

Share Document