scholarly journals Discussion: “A Simple Approach to an Approximate Two-Dimensional Cascade Theory” (Schilhansl, M. J., 1958, ASME J. Appl. Mech., 25, pp. 607–612)

1959 ◽  
Vol 26 (3) ◽  
pp. 474-475
Author(s):  
Hans Kraft
Keyword(s):  
Simple Approach ◽  
Two Dimensional ◽  
Cascade Theory

scholarly journals Modelling of Antarctic Tabular Icebergs in Ocean Waves

1983 ◽  
Vol 4 ◽  
pp. 152-157 ◽  
Author(s):  
Monica Kristensen ◽  
Vernon A. Squire
Keyword(s):  
Surface Waves ◽  
Field Data ◽  
Ocean Waves ◽  
Simple Approach ◽  
Two Dimensional ◽  
Main Difficulty ◽  
Floating Bodies ◽  
Frequency Dependent ◽  
Response Behaviour ◽  
Dimensional Simulation

The prediction of the motions of a tabular iceberg in a seaway is a problem which cannot be solved with a simple approach. The main difficulty lies in the size and mass of the iceberg, which produce frequency-dependent hydrodynamical effects as it moves in the water. Specifically, any solution must take into account both the added inertia and the generation of surface waves caused by the motions of the berg. Early attempts at modelling, which did not include these terms, could not accurately predict the complicated response behaviour seen in field data. In this paper we discuss some modifications to a two-dimensional simulation of floating bodies in waves, which must be applied when the motions and the hydro-dynamical pressures beneath tabular icebergs are required.

scholarly journals Modelling of Antarctic Tabular Icebergs in Ocean Waves

1983 ◽  
Vol 4 ◽  
pp. 152-157
Author(s):  
Monica Kristensen ◽  
Vernon A. Squire
Keyword(s):  
Surface Waves ◽  
Field Data ◽  
Ocean Waves ◽  
Simple Approach ◽  
Two Dimensional ◽  
Main Difficulty ◽  
Floating Bodies ◽  
Frequency Dependent ◽  
Response Behaviour ◽  
Dimensional Simulation

The prediction of the motions of a tabular iceberg in a seaway is a problem which cannot be solved with a simple approach. The main difficulty lies in the size and mass of the iceberg, which produce frequency-dependent hydrodynamical effects as it moves in the water. Specifically, any solution must take into account both the added inertia and the generation of surface waves caused by the motions of the berg. Early attempts at modelling, which did not include these terms, could not accurately predict the complicated response behaviour seen in field data. In this paper we discuss some modifications to a two-dimensional simulation of floating bodies in waves, which must be applied when the motions and the hydro-dynamical pressures beneath tabular icebergs are required.

A Simple Approach to an Approximate Two-Dimensional Cascade Theory

1958 ◽  
Vol 25 (4) ◽  
pp. 607-612
Author(s):  
Max J. Schilhansl
Keyword(s):  
Simple Approach ◽  
Geometrical Shape ◽  
Approximate Theory ◽  
Two Dimensional ◽  
Mathematical Methods ◽  
Simple Method ◽  
Sources And Sinks ◽  
Singularity Method ◽  
Two Dimensional Flow ◽  
Stagger Angle

Abstract The following simple approach to an approximate theory of incompressible two-dimensional flow past cascades, Fig. 1, is based on the so-called singularity method, in which the blade sections are replaced by sheets of vortexes, sources and sinks, and the flow induced by these singularities is calculated. The condition that the flow must be tangential to the blade surface, sometimes termed as the tangency condition, leads to a relation between the geometrical shape of the blade sections (camber and thickness), the cascade parameters (solidity and stagger angle), and the singularity distributions along the mean camber lines. As soon as these distributions are known, the pressure distribution and the lift may be determined. The calculation of the velocities at the blades is the most laborious portion of the whole problem. It has been carried out by various authors [1–4], with different mathematical methods. In this paper, a short, simple method of calculating the velocities induced by the singularities will be described. This approach has already been applied by others [5, 6], in less elaborate form.

Self-folding of polymer sheets using microwaves and graphene ink

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89254-89261 ◽  
Author(s):  
Duncan Davis ◽  
Russell Mailen ◽  
Jan Genzer ◽  
Michael D. Dickey
Keyword(s):  
Three Dimensional ◽  
Simple Approach ◽  
Two Dimensional ◽  
2D Material ◽  
3D Objects ◽  
Polymer Sheets

Self-folding represents an attractive way to convert two-dimensional (2D) material sheets into three-dimensional (3D) objects in a hands-free manner. This paper describes a simple approach to self-fold pre-strained polystyrene (PS) sheets using microwaves.

Performance Prediction of a Mixed Flow Impeller

1992 ◽  
Vol 206 (3) ◽  
pp. 189-196 ◽  
Author(s):  
S Sarkar
Keyword(s):  
Performance Prediction ◽  
Flow Path ◽  
Experimental Results ◽  
Two Dimensional ◽  
Conical Flow ◽  
Mixed Flow ◽  
Cascade Theory ◽  
Operating Range ◽  
Normal Operating ◽  
Specific Speed

A method based on two-dimensional cascade theory is presented here to predict the characteristics of mixed flow impellers of high specific speed having a conical flow path. The theoretical characteristics are compared with the experimental results. Agreement is fairly good in the normal operating range, but some uncertainties exist in the assessment of appropriate slip factors and losses in the field of mixed flow rotor cascades, which need further studies. In the present case, the flow is assumed to be incompressible.

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