Metal Temperature Distribution Research Articles

The temperature distribution in liquid metal cooled fuel elements

This article presents the results of experimental and analytical studies of temperature distributions and heat transfer in reactor cores with hexagonal fuel element assemblies. The temperatured is tributions in fuel elements in the central region and at the plane walls are analyzed. Some information i s given on the overheating of fuel element cladding under the spacing fins. Effects related to the redistribution of coolant flow rates over the crosssection of the assembly in the transition from turbulent to laminar flow are discussed.

Vehicular Gas Turbine Periodic-Flow Heat Exchanger Solid and Fluid Temperature Distributions

Design, fabrication, and operation experience with periodic-flow heat exchangers used in General Motors regenerative vehicular gas turbines has indicated that analysis techniques available in published reports are too restrictive for accurate performance and thermal distortion calculations. The design usefulness of previously published analyses is somewhat limited because fluid and metal temperature distributions are not part of the calculated results. These distributions are required for primary seal matching and core and structural thermal stress calculations. A nodal analysis has been accomplished at the General Motors Research Laboratories and a type of finite difference solution obtained for the periodic-flow heat exchanger. This solution can be used to study the effects of longitudinal thermal conduction, variable heat-transfer coefficients, finite rotation, and provides temperature distributions as functions of time and space for transient as well as “steady-state.” This has been checked both with available solutions for more simplified cases and some experimental measured results for periodic flow heat exchangers designed and built as part of the General Motors vehicular regenerative gas turbine program. A brief outline of the calculation procedures, program capabilities, and some calculated results is presented. This includes temperature distributions for periodic-flow heat-exchanger parameters encountered in the vehicular regenerator application.

Temperatures in Orthogonal Metal Cutting

The results of a photographic technique for the determination of the complete temperature distribution in the orthogonal metal cutting process are presented; they are found to disagree with previous theoretical predictions. The temperatures along the tool rake face are of particular interest because they are thought to affect the wear of the cutting tool and friction between the chip and tool; it is found that these temperatures have been considerably over-estimated by previous work. By introducing the width of the secondary deformation zone, i.e. the extent of sub-surface deformation due to friction at the tool-chip interface, as a new variable, it is found that more consistent predictions of rake face temperatures can be made. From this work information has been obtained on the shape of the zones of plastic deformation in metal cutting and on the distribution of heat generation within these zones.

Flow of Liquid Metal Past a Porous Flat Plate

A simple boundary-layer approximation formula is derived for the temperature distribution in liquid metal which flows past a porous flat plate at zero incidence at velocity U and is sucked into it at velocity V.

Coupling of elastic and thermal deformations I

The general solution for the stress and temperature distribution in an isotropic thermoelastic solid occupying the half space has been given when the classical heat conduction equation is suitably modified to take into account the effect of variation of strain on the variation of temperature, the boundary of the solid being assumed to be stress-free but with prescribed temperature distribution. As an illustration the axial temperature distribution in a particular metal has been found for small values of time. The method of integral transform is used as the mathematical tool.