Stagnation point heat transfer in a gas undergoing relaxation of its
internal energy is examined by solution of the equations of motion
using the two temperature approach of Wang Chang and Uhlenbeck.
The results are presented in parametric form and show that relaxation effects produce an adiabatic wall temperature above...
The study of nonlinear vibrations of systems having two
degrees of freedom has met considerable attention during the past
few years. Nonlinear symmetrical systems have received most of it.
Normal mode motion of a system is defined as a periodic motion
such that the masses of the system assume repeated...
The respiratory tract is lined with a mucous blanket which is
motivated by a ciliated epithelium. This blanket includes a lower
serous layer of fluid through which the cilia beat and an upper viscid
layer into which particulates from the inhaled air are deposited.
The movement of the mucous blanket...
The zirconium-chromium phase diagram was investigated in the
region between 40% and 85% chromium. The ZrCr₂ intermetallic
compound which has been the source of some controversy was especially
considered. It was found that ZrCr₂ transforms from the low
temperature C-15 (MgCu₂, FCC) structure to the high temperature
C-14 (MgZn₂, HCP)...
Flat, laminar, premixed hydrocarbon-air flames were stabilized
on a porous-plate burner. In addition to temperature profiles,
concentration profiles were measured for methane, ethane, ethylene,
propane, acetylene, propylene, carbon monoxide, carbon dioxide and
oxides of nitrogen. Dead space thickness, luminous flame zone
thickness and hydrocarbon disappearance point responses were also
monitored....
Solid solution alloying was employed in an attempt to produce some
relatively ductile form of beryllium. If the c/a ratio could be significantly
altered, it was felt new or different slip systems could be activated. The
following elements were selected on the basis of atomic size, melting point,
crystal structure...
The heat-transfer phenomena studied in this work were
associated with pool boiling from a flat horizontal surface facing
upward with the bulk liquid at its saturation temperature. The
analysis of boiling sound and the investigation of the transition boiling
mechanism constituted the essence of the present study.
The distinctively large...
A model of an exhaust plume was developed and programmed
on a digital computer. The purpose of the model was to predict the
concentration and size distribution of ice particles produced from
automobile exhaust during arctic conditions. The model accounted
for the nucleation, growth, and freezing of the condensed water...
An experimental study was performed to investigate the effect of
flow channel geometry on fully developed turbulent flow in "clean" rod
bundle flow channels. This information was sought to obtain a better
understanding of crossflow mixing between rod bundle subchannels. The
experiments were performed in water with a Reynolds number...
A high volume sampling system, employing Nuclepore filters and
designed for sampling particulate in the plumes from industrial
sources using a light aircraft, is described. The effluent of kraft
paper mills was sampled using this system and then analyzed by
electron microscopy.
Size distributions of particles were obtained at several...
Because of the fuel crisis and problems associated with thermal
pollution there is new impetus and urgency for developing more
efficient energy conversion systems for power generation. A preliminary
analysis was undertaken to determine the potential of staged
Rankine cycle systems for substantially higher efficiency. It was
necessary to optimize...