scholarly journals Discussion: “Stresses in a Metal Tube Under Both High Radial Temperature Variation and Internal Pressure” (Chang, C. C., and Chu, W. H., 1954, ASME J. Appl. Mech., 21, pp. 101–108)

1955 ◽  
Vol 22 (1) ◽  
pp. 136-137
Author(s):  
J. H. Faupel
Keyword(s):  
Internal Pressure ◽  
Temperature Variation ◽  
Metal Tube ◽  
Radial Temperature

Stresses in a Metal Tube Under Both High Radial Temperature Variation and Internal Pressure

1954 ◽  
Vol 21 (2) ◽  
pp. 101-108
Author(s):  
Chieh-Chien Chang ◽  
Wen-Hwa Chu
Keyword(s):  
Stress Distribution ◽  
Temperature Variation ◽  
Modulus Of Elasticity ◽  
Coefficient Of Thermal Expansion ◽  
Metal Tube ◽  
Radial Temperature ◽  
Variation Of Parameters ◽  
Effects Of Temperature ◽  
Fundamental Equations ◽  
Very High

Abstract The paper treats the stress distribution in a metal tube which is subject to a very high radial temperature variation and pressure. The radial temperature distribution across the tube wall and the variations of the modulus of elasticity and the coefficient of thermal expansion are obtained from experimental data, and all these effects of temperature are taken into account in the calculations. The fundamental equations in the case of plane strain and plane stress can be formulated as the nonhomogeneous Whittaker differential equations. The corresponding solutions are obtained by the method of variation of parameters and in terms of Kummer series. An example is shown, and the stress distribution across the wall is given. For comparison, the stress distribution of the case of constant modulus of elasticity and coefficient of expansion is included.

Sequential Estimation of the Radial Temperature Variation in Overhead Power Cables

2021 ◽  
pp. 1-14
Author(s):  
Farith M. Absi Salas ◽  
Helcio R. B. Orlande ◽  
Luis A. M. C. Domingues ◽  
Carlos R. N. Barbosa
Keyword(s):  
Temperature Variation ◽  
Sequential Estimation ◽  
Power Cables ◽  
Radial Temperature

A Thermo-Hydrodynamic Analysis of a Mechanical Face Seal

1992 ◽  
Vol 114 (4) ◽  
pp. 639-645 ◽  
Author(s):  
M. D. Pascovici ◽  
I. Etsion
Keyword(s):  
Boundary Conditions ◽  
Thermal Behavior ◽  
Temperature Variation ◽  
Energy Equation ◽  
Face Seal ◽  
Radial Temperature ◽  
Hydrodynamic Analysis ◽  
Implicit Equation ◽  
Face To Face ◽  
Mechanical Face Seal

A thermo-hydrodynamic analysis is performed for a face-to-face double seal configuration. Temperature and viscosity variations both across and along the sealing gap are considered and realistic boundary conditions are considered. The energy equation is solved analytically and the radial temperature variation is presented by an implicit equation. This approach enables analytical parametric investigation and gives better understanding of the effects of various parameters on the seal’s thermal behavior.

scholarly journals Impulsive Motion in a Cylindrical Fluid-Filled Tube Terminated by a Converging Section

2019 ◽  
Vol 141 (2) ◽  
Author(s):  
Jean-Christophe Veilleux ◽  
Joseph E. Shepherd
Keyword(s):  
Free Surface ◽  
Internal Pressure ◽  
Model System ◽  
Complex Interaction ◽  
Normal Operation ◽  
Pressure Waves ◽  
Metal Tube ◽  
Impulsive Motion ◽  
Injection Mechanism ◽  
Auto Injector

The syringe in a subcutaneous auto-injector may be subjected to internal pressure transients due to the normal operation of the injection mechanism. These transients are similar to transients in fluid-filled pipelines observed during water hammer events. In this paper, the effect of an air gap in the syringe and a converging section is studied experimentally and numerically in a model system which consists of a fluid-filled metal tube that is impulsively loaded with a projectile to simulate the action of the auto-injector mechanism operation. The air between the buffer and the water results in a complex interaction between the projectile and the buffer. Also, there are tension waves inside the tube due to the presence of a free surface and the motion of the buffer, and this causes distributed cavitation which, in turn, gives rise to steepening of the pressure waves. The converging section can amplify the pressure waves if the wave front is sharp, and it can enhance the collapse of bubbles. Pressures as high as 50 MPa have been measured at the apex of the cone with impact velocities of 5.5 m/s.

Thermal Buckling and Snapping of a Circular Ring

1971 ◽  
Vol 93 (4) ◽  
pp. 1245-1254
Author(s):  
David Burgreen
Keyword(s):  
Temperature Distribution ◽  
Temperature Variation ◽  
Circular Ring ◽  
Thermal Buckling ◽  
Uniform Temperature ◽  
Radial Temperature ◽  
Axial Temperature ◽  
Axisymmetric Temperature

An analysis is made of the thermal buckling of flat rings and of shallow conical rings which are subjected to an axisymmetric temperature distribution. It is found that flat rings can buckle when there is a radial temperature variation only. Conical rings are subject to instability and snapping in the presence of either an axial temperature variation alone, or a combined axial and radial temperature variation, of the proper magnitude. Expressions are developed which give the temperatures at which buckling and snapping take place, as well as the temperature over-lap in a full thermostatic cycle of increasing and decreasing temperatures. Bimetallic conical rings at uniform temperature are examined, and snapping temperatures are determined for this type element.

Impulsively-Generated Pressure Transients and Strains in a Cylindrical Fluid-Filled Tube Terminated by a Converging Section

2017 ◽  
Author(s):  
Jean-Christophe Veilleux ◽  
Joseph E. Shepherd
Keyword(s):  
Free Surface ◽  
Internal Pressure ◽  
Wave Front ◽  
Model System ◽  
Complex Interaction ◽  
Normal Operation ◽  
Pressure Waves ◽  
Metal Tube ◽  
Pressure Transients ◽  
Injection Mechanism

The syringe in a subcutaneous autoinjector may be subjected to internal pressure transients due to the normal operation of the injection mechanism. These transients are similar to transients in fluid-filled pipelines observed during water hammer events. In this paper, the effect of an air gap in the syringe and a converging section are studied experimentally and numerically in a model system which consists of a fluid-filled metal tube that is impulsively loaded with a projectile to simulate the action of the autoinjector mechanism operation. The air between the buffer and the water results in a complex interaction between the projectile and the buffer. Also, there are tension waves inside the tube due to the presence of a free surface, and this causes distributed cavitation which, in turn, gives rise to steepening of the pressure waves. The converging section can amplify the pressure waves if the wave front is sharp. Pressures as high as 50 MPa have been measured at the apex of the cone with impact velocities of 5.5 m/s.

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