USE OF A HIGH-SPEED DIGITAL COMPUTER FOR ANALYSIS OF CATAPULT PERFORMANCE

1954 ◽  
Author(s):  
C. M. KING
Keyword(s):  
Digital Computer ◽  
High Speed

The Wall Effect in Cavity Flow

1966 ◽  
Vol 88 (1) ◽  
pp. 132-136 ◽  
Author(s):  
D. K. Ai
Keyword(s):  
Flow Field ◽  
Flat Plate ◽  
Integral Equations ◽  
Nonlinear Theory ◽  
Digital Computer ◽  
High Speed ◽  
Cavity Flow ◽  
Channel Width ◽  
Wall Effect ◽  
Plate Location

A nonlinear theory for the calculation of the flow field of an oblique flat plate under blockage condition is given using the techniques of integral equations. Numerical results are obtained with the aid of a high-speed digital computer for the plate situated midchannel at values of the angle of attack from 10 to 90 deg and the channel width-chord ratio from 3 to 20. Although the theory is developed for arbitrary plate location, the midchannel case is of great interest due to the fact that most of the tests are performed at this position.

The Calibration of Thermocouples by Freezing-Point Baths and Empirical Equations

1959 ◽  
Vol 81 (2) ◽  
pp. 177-188 ◽  
Author(s):  
R. P. Benedict
Keyword(s):  
Digital Computer ◽  
High Speed ◽  
Freezing Point ◽  
Individual Characteristics ◽  
Empirical Equations ◽  
Test Results ◽  
Calibration System ◽  
Temperature Range ◽  
Experimental Values ◽  
The Individual

A calibration system is described which is based on the use of a few precisely determined experimental values obtained from freezing-point baths. Characteristics of the individual thermocouples at intermediate points are obtained by passing empirical equations of prescribed form through the test values. A program is reviewed, by which a high-speed digital computer accomplishes the necessary conversions, curve fittings, comparisons of individual characteristics with arbitrary reference tables, and the printing out of a table of differences. Test results for a series of iron-constantan thermocouples, over the temperature range 32–1225 F, are presented to illustrate the use of the system and the uncertainties involved. Comparisons are drawn between these results and those obtained by other methods.

Balancing of High Speed Machinery

1967 ◽  
Vol 89 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Chi-Yeh Han
Keyword(s):  
Phase Angle ◽  
Analytical Method ◽  
Digital Computer ◽  
High Speed ◽  
Mechanical Systems ◽  
Constant Speed ◽  
Mass Moment ◽  
Balance Weight ◽  
Optimal Values ◽  
Complete Revolution

An analytical method for optimal balancing of the shaking forces and the shaking moments of force of any plane mechanism driven by a constant speed shaft is developed. The optimal values of phase angle and mass moment of the balance weight on the driving shaft are ascertained, such that the variation of load on the machine supports due to shaking forces and shaking moments of force will be a mininum through a complete revolution of the driving shaft. Using a digital computer, this method is applicable to complicated mechanical systems; an illustrative example follows the analysis.

Fission fragment damage to crystal lattices: lead iodide. II. Atomic displacement

1966 ◽  
Vol 294 (1436) ◽  
pp. 93-111 ◽  
Keyword(s):  
Electron Microscope ◽  
Point Defects ◽  
Fission Fragment ◽  
Digital Computer ◽  
Basal Plane ◽  
High Speed ◽  
Atomic Displacement ◽  
Lead Iodide ◽  
Crystal Lattices

This paper describes some dynamic calculations which have been performed for a simulated lead iodide lattice on a high speed digital computer. The principle is similar to that of earlier computations for metals by Gibson, Goland, Milgram & Vineyard (19660). The results show that channelling of atoms in the lead iodide lattice is possible in the <101 ˉ 1> direction and parallel to the basal plane. It is suggested that channelling of knocked-on lattice atoms in lead iodide may be a factor in increasing considerably the mobility of point defects in an irradiated crystal and in explaining electron microscope observations of fission fragment damage.

Three-dimensional Fourier summations on a high-speed digital computer

1953 ◽  
Vol 6 (5) ◽  
pp. 427-427 ◽  
Author(s):  
S. W. Mayer ◽  
K. N. Trueblood
Keyword(s):  
Digital Computer ◽  
High Speed ◽  
Three Dimensional
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