In design and fabricate drive shafts with high value of fundamental natural frequency that represented high value of critical speed; using composite materials instead of typical metallic materials could provide longer length shafts with lighter weight. In this paper, multi-objective optimization (MOP) of a composite drive shaft is performed considering three conflicting objectives: fundamental ...

Although the gas turbine combined cycle (GTCC) system has better environmental performance, it still emits pollution gases such as CO2 and NOx. It is reasonable necessary to add cost power production of GTCC system. Based on structure theory thermoeconomics, through pricing pollutants (considering costs NOx emission), thermoeconomic (ETC) model developed in this study, which achieves absolute i...

The design of a convective drying cycle could be challenging because its thermodynamic performance depends on wide range operating parameters. Further, the initial product properties and environmental conditions fluctuate during production, affecting final quality, impact, energy usage. An off-design analysis distinguishes effects different parameters defining setup with best more stable perfor...

Abstract Traditionally, submarine hydrodynamic design has focussed mainly on requirements regarding operational range, powering performance and manoeuvring ability for deeply submerged conditions. To improve the effectiveness of boat, attention is also paid to operating near or at surface fortunately, computational tools experimental methods are available analyse submarines these advance hydrod...