International Journal of Mechanical Engineering

1-8

Authors: AMIR QASHQAEI & RAMIN GHASEMI ASL

In this paper, a comparison of heat transfer and pressure drop characteristics of CuO/water nanofluids in a helically coiled heat exchanger held in horizontal and vertical positions is presented. heat transfer of Nanofluid is a new environment, usually metallic nanoscale particles suspended in a base fluid composed. Do nanofluidics compared with conventional fluids have higher coefficients of thermal conductivity and displacing. However, due to the increased use of nanofluidics, sometimes leading to excessive pressure drop can be pumped. The theoretical study of this issue using nano-fluids in the heat exchanger tube and shell and tube heat exchangers are widely used in the industry are the purpose of the project is located.

1-8

Authors: L. UMAMAHESWARARAO & K. MALLIKARJUNARAO

The first stage rotor blade of a gas turbine has been analyzed for structural, thermal analysis using ANSYS (Finite Element Analysis Software). The material of the blade was specified as INCONEL 718. The thermal boundary conditions on the rotor blade are taken from the reference. The temperature distribution across the blade is obtained. The maximum stress up to which the blade can withstand is known and the stress distributions across the blade are obtained accordingly. The obtained results are compared with N-155, Mild Steel and the most suitable material is discussed. In final the actual fir tree model blade root compared with I-section model blade root, results are tabulated and it is observed that stress distribution less in fir tree model that the I-section model.

23-36

Authors: MOHAMED HUSSEIN NASSAR HASSAN & MOHAMED AHMED SOLIMAN AL SHERIF

States have always had access to seas and the governments of these states always had important interests, that grew throughout history, to be achieved in the coastal areas close to these states, such as the growth of the world trade, and the need to guard these waters against smuggling that deprives the states from revenues, and also to control and implement regulations on health, migration, exclusive rights of fishing, mining and natural resources, using touristic sights, and organizing the fleets defending the state. And it’s one of the most critical factors affecting the use of the commercial, as well as military and technological power of the state. The research problem is the competition for the control over coastal seas, and allegations of marine areas and international waters. Taking into consideration recent international changes and amendments of the international rules and especially the study of coastal state authorities, as well as maritime law and the authorities given to the state in accordance with the international rules and regulations to recognize its own sovereignty over coastal waters, in addition to the sovereign rights and duties along the coast line on innocent passage. The aim of this research is to review the concept of sea expansion and measure all maritime areas which allow a coastal state to extend its mandate, and utilizing it efficiently economically and strategically in accordance with international the maritime law and its provisions. This research adopts the analytical approach in general, and the historical and realistic narrative approach in brief by explaining and analysing all the international conventions and treaties, laws, rules, as well as comparisons resulting from experience and recent studies in that content.