Samples of commercial purity titanium were heat treated above the
beta transformation temperature and within the two phase alpha-beta
phase field, followed by cooling at varying rates. Testing of the
samples in tension and by instrumented impact indicated that some
strengthening could be imparted by these heat treatments, although at...
An experimental investigation has been performed to determine the
forced convection heat transfer due to three-dimensional air flow over
a flat plate as a function of angle of attack and free stream velocity.
The experimental method employed a transient thermal technique and
placed the convecting surface next to the exhaust...
The literature cites several examples of investigations made
concerning the size of bubbles rising in small particle fluidized beds
at room temperature. In many practical applications, however, fluidized
beds require the use of large particles at very high temperatures.
Despite this fact, little information has been reported on bubble size...
Some desirable features of a solar energy collector are listed
and a collector design is presented which incorporates their features.
As the collector is operated, air flows within the collector enclosure
and is heated as it passes through a porous radiant energy receiver
mounted in the enclosure. The porous energy...
An important element in rector safety and fuel performance assessments is the efficient calculation of the time dependent temperature profiles within reactor fuel pins. Because the fuel pins have temperature dependent thermal properties, the governing partial differential equations are nonlinear. Traditionally, finite difference or finite element methods have been used...
Water source heat pumps are increasingly being used for residential
and commercial space heating. Typically, these heat pumps are capable
of both heating and cooling, and historically the design emphasis
has been on improving the units' cooling performance. Recently,
there has been more interest in improving the heating performance,
however,...
"Piping Design and Engineering" first published in 1963 by
Grinnell, Co. is widely used by engineers to perform approximate
thermal stress analysis of high-temperature piping systems. The
text consists of numerical constants to calculate end reactions and
maximum bending stresses in a variety of piping configurations from
known properties of...
The thermal energy storage requirements for a district heating
system utilizing geothermal energy is evaluated with respect to the
system design heating load and local climatic conditions. The
local climate pattern is represented by a series of events which
characterize the nature and sequence of the cold spells that can...
This study was concerned with the flow of a magnetic self-propelled
ferrohydrodynamic fluid in a horizontal circular tube subjected
to axially varying temperature and magnetic field. The first
phase of the study involved the analytical solution to the governing
equations for the velocity and temperature profiles within the fully
developed...
Emissions of oxides of nitrogen from a small (15 kW) turbine generator burning high fuel bound nitrogen fuels were measured by a chemiluminescence method. Kerosene was used as the base fuel and pyridine was added to achieve different fuel bound nitrogen levels. Mixtures of 0.0%, 0.5%, and 1.0% (by weight)...
The object of this research study is to investigate and provide
some fundamental information about bed slumping in a partially defluidized
bed combustor. Due to the difficulty in making measurements and
observations at high temperature, a dynamically similar cold phase
fluidized bed was used to model the high temperature case....
A problem found in high speed transport aircraft is
excessive tail loading when flying at cruise speeds through
turbulence. Attempts to reduce these areodynamic forces on
the tail may result in unstable aircraft motions. Using a
linear quadratic regulator in conjunction with a Kalman
filter, the feasibility of designing an...
An algorithm is developed to compute the time averaged, output
statistics of a linear system with periodic coefficients forced by
stationary white noise. The algorithm makes use of Floquet theory
and introduces the averaged system dynamics matrix to obtain more
favorable numerical performance. The time series approach to
averaged statistics...
This thesis presents thermodynamic evaluations of various biomass-fueled combined-cycle power plants using a computer model developed for simulating such plants. The combined-cycle systems Investigated are characterized by having a wood-fueled combustor, an indirect-fired gas turbine, and a steam cycle. This work was part of a larger biomass energy project at...
The stability of small oscillations of the troposkeinshaped
blade used on Darrieus wind turbines is investigated.
The blade is assumed to be attached to a perfectly rigid rotor
shaft and spinning in still air. Linear equations of motion are
derived which include the effects of in-plane, out-of-plane,
and torsional stiffness,...
A complete analytical model of radiative and convective heat
transfer to a horizontal tube in small and large particle gas fluidized
beds has been developed. In the model the bed of particles
consists of an emulsion phase and a bubble phase. The emulsion phase
is approximated by a series of...