Thermal contact conductance for cylindrical and spherical contacts |
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Authors: | S?Sunil Kumar P?M?Abilash Email author" target="_blank">K?RamamurthiEmail author |
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Institution: | (1) Propulsion Research and Studies Group, Liquid Propulsion Systems Centre, Trivandrum, Kerala, India, 695 547, |
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Abstract: | A prediction methodology based on Monte-Carlo simulation model, developed for flat conforming surfaces in contact, is modified
and extended to predict contact conductance between curvilinear surfaces like cylinders and spheres. Experiments are also
conducted in vacuum for the measurement of contact conductance between stainless steel and aluminium cylindrical contacts
and stainless steel spherical contacts over a range of contact pressures. The contact conductance between cylindrical and
spherical bodies is, in general, about an order of magnitude lower than for flat surfaces in contact. Increase of surface
roughness and decrease in contact pressure lowers the contact conductance. However, the influence of these parameters is larger
than those obtained for flat surfaces. The prediction for different parametric conditions agree closely with those measured
in the experiments. |
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Keywords: | |
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