ISJ Theoretical & Applied Science 07(159) 2026

Philadelphia, USA

Purtskhvanidze, G., Shubladze, Z., Kurshubadze, T., Bekirishvili, M., & Gvetadze, V.

Analysis of the Temperature and Thermal Stress State of Marine Engine Components.

Full Article: PDF

Scientific Object Identifier: http://s-o-i.org/1.1/TAS-07-159-4

DOI: https://dx.doi.org/10.15863/TAS.2026.07.159.4

Language: English

Citation: Purtskhvanidze, G., Shubladze, Z., Kurshubadze, T., Bekirishvili, M., & Gvetadze, V. (2026). Analysis of the Temperature and Thermal Stress State of Marine Engine Components. ISJ Theoretical & Applied Science, 07 (159), 63-68. Soi: https://s-o-i.org/1.1/TAS-07-159-4 Doi: https://dx.doi.org/10.15863/TAS.2026.07.159.4

Pages: 63-68

Published: 30.07.2026

Abstract: Maintaining the temperature and thermal stress of engine components within permissible limits is impossible without some heat loss. It has been established that only 35–45% of the thermal energy is converted into useful (effective) energy. To determine the thermal stress experienced by individual components, the heat released in the cylinder must be apportioned among them. The engine's thermal balance makes it possible to assess the degree of heat utilization, quantify heat losses, and evaluate the potential for reducing them. In turn, the degree of heat utilization can be improved through the recovery of waste heat. The thermal stress of engine components is determined not only by the magnitude of the thermal balance components, but also by the heat flux density and intensity. The bottom of the cylinder heads and the piston crown are characterized by the highest heat flux densities. The result of the thermal stress magnitude is the mechanical properties of materials, which determines the reliability and durability of components and assemblies. The thermal stress of engine components can be assessed using various criteria.

Key words: heat flux density and intensity; thermal stress; useful energy; heat utilization efficiency; heat losses; thermal energy recovery; mechanical properties of materials; reliability and durability of components.