Three-Dimensional Ice-Accretion Measurement Methodology for Experimental Aerodynamic Simulation

2018 ◽  
Vol 55 (2) ◽  
pp. 817-828 ◽  
Author(s):  
Andy P. Broeren ◽  
Harold E. Addy ◽  
Sam Lee ◽  
Marianne C. Monastero ◽  
Stephen T. McClain
Keyword(s):  
Three Dimensional ◽  
Ice Accretion ◽  
Measurement Methodology ◽  
Aerodynamic Simulation

Integrated Microcomputer-LDV Instrumentation for Studying Finite Wing Aerodynamics

1993 ◽  
Author(s):  
Abdollah Khodadoust
Keyword(s):  
Reynolds Number ◽  
Flow Field ◽  
Data Acquisition ◽  
Fiber Optic ◽  
Three Dimensional ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter ◽  
Ice Accretion ◽  
Wing Model ◽  
Finite Wing

Abstract The effect of a simulated glaze ice accretion on the flow field of a three-dimensional wing is studied experimentally. A PC-based data acquisition and reduction system was used with a four-beam two-color fiber-optic laser Doppler velocimeter (LDV) to map the flow field along three spanwise cuts on the model. Results of the LDV measurements on the upper surface of the finite wing model without the simulated glaze ice accretion are presented for α = 0 degrees at Reynolds number of 1.5 million. Measurements on the centerline of the clean model compared favorably with theory.

Anatomical Frames of Reference and Biomechanics

1978 ◽  
Vol 22 (1) ◽  
pp. 607-610
Author(s):  
Herbert M. Reynolds ◽  
Robert P. Hubbard
Keyword(s):  
Air Force ◽  
Three Dimensional ◽  
Frames Of Reference ◽  
Anatomical Landmarks ◽  
Data Comparability ◽  
Kinematic Study ◽  
Measurement Methodology ◽  
Research Contract ◽  
Kinematic Properties

Segment axes systems for simulations have been defined by the inertial tensor unique to each simulated body segment. When empirical three-dimensional data are sought that describe either the mass distribution or the kinematic properties of the human body, anatomical frames of reference are needed for the sake of measurement methodology and data comparability. Anatomical axes systems are based on anatomical landmarks that must represent functional and stable features in the skeletal geometry. This presentation will, therefore, discuss the role of anthropometric landmarks used in defining anatomical coordinate axes systems, and results using present preliminary anatomical frames of reference in a kinematic study of the human hip joint in a research program sponsored by the Air Force Office of Scientific Research (Contract #F49620-78-C-0012).

A Eulerian Method for Water Droplet Impingement by Means of an Immersed Boundary Technique

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Francesco Capizzano ◽  
Emiliano Iuliano
Keyword(s):  
Water Droplet ◽  
Numerical Solutions ◽  
Experimental Testing ◽  
Three Dimensional ◽  
Immersed Boundary ◽  
Test Cases ◽  
Ice Accretion ◽  
Droplet Impingement ◽  
Protection Systems ◽  
Numerical Approaches

The estimation of water droplet impingement is the first step toward a complete ice accretion assessment. Numerical approaches are usually implied to support the experimental testing and to provide fast responses when designing ice protection systems. Basically, two different numerical methodologies can be found in literature: Lagrangian and Eulerian. The present paper describes the design and development of a tool based on a Eulerian equation set solved on Cartesian meshes by using an immersed boundary (IB) technique. The tool aims at computing the evolution of a droplet cloud and the impingement characteristics onto the exposed surfaces of an aircraft. The robustness of the methodology and the accuracy of the approach are discussed. The method is applying to classical two- and three-dimensional test cases for which experimental data are available in literature. The results are compared with both experiments and body-fitted numerical solutions.

Prediction of Ice Accretion on Wind Turbine with Numerical Method

2012 ◽  
Vol 512-515 ◽  
pp. 754-757
Author(s):  
Xian Yi ◽  
Kai Chun Wang ◽  
Hong Lin Ma
Keyword(s):  
Wind Turbine ◽  
Numerical Method ◽  
Collection Efficiency ◽  
Three Dimensional ◽  
Horizontal Axis ◽  
Ice Accretion ◽  
Horizontal Axis Wind Turbine ◽  
Blade Tip ◽  
Computer Codes ◽  
Multiple Reference

A three dimensional numerical method and its computer codes, which are suitable to predict the process of horizontal axis wind turbine icing, are presented. The method is composed of the Multiple Reference Frame (MRF) method to calculate flowfield of air, an Eulerian method to compute collection efficiency and a three dimensional icing model companying with an iterative arithmetic for solving the model. Ice accretion on a 1.5 MW horizontal axis wind turbine is then computed with the numerical method, and characteristics of droplet collection efficiency and ice shape/type are obtained. The results show that ice on the hub and blade root is slight and it can be neglected comparing with ice near blade tip. From blade tip to root, ice becomes thinner and glaze ice may changes into rime ice.

scholarly journals Aerodynamic Simulation of Runback Ice Accretion

2009 ◽  
Author(s):  
Andy Broeren ◽  
Edward Whalen ◽  
Greg Busch ◽  
Michael Bragg
Keyword(s):  
Ice Accretion ◽  
Aerodynamic Simulation

PoliMIce: A simulation framework for three-dimensional ice accretion

2015 ◽  
Vol 267 ◽  
pp. 96-107 ◽  
Author(s):  
G. Gori ◽  
M. Zocca ◽  
M. Garabelli ◽  
A. Guardone ◽  
G. Quaranta
Keyword(s):  
Three Dimensional ◽  
Ice Accretion ◽  
Simulation Framework

A Numerical Study of Droplet Impingement for In-Flight Ice Accretion Prediction

2016 ◽  
Author(s):  
Hao Zhang ◽  
Chihyung Wen ◽  
Junwei Su
Keyword(s):  
Collection Efficiency ◽  
Numerical Study ◽  
Three Dimensional ◽  
Ice Accretion ◽  
Eulerian Model ◽  
Droplet Impingement ◽  
Basic Module ◽  
Wide Range ◽  
Subsonic Regime ◽  
Finite Volume Approach

Droplet impingement is the basic module in both ice accretion and anti-icing numerical calculation. A three dimensional finite volume approach with the capacity of modeling the in-flight droplet impingement on a wide range of subsonic regime is therefore established in this research, using OpenFOAM®. The Eulerian model is applied to estimate the droplet flow field with the same computational grid sets as those of the air flow calculation. The roughness effect caused by ice accretion is considered in the wall function modeling. Thus, the collection efficiency could be investigated for further icing numerical simulations. This approach is validated on both cylinder and sphere benchmark cases. The results are compared with the corresponding experimental and LEWICE (LEWis ICE accretion program) simulation data.

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