The low pressure steam Turbine blades are suffering especially the longest parts a bad history of failure. The breakage reasons are unknown due to its complexity. The aim of this work concentrated for the analysis of stresses at the last stage blades in Baji thermal power station. No records have been recorded of breakage incident at any other stages. The aim of the designer is to find way of reducing stresses due to centrifugal force.(ANSYS 12.1) is used for obtaining various stresses in case. The blades without lacing rod, the blades with lacing rod. It was concluded throughout using (ANSYS) Techniques, analysis increasing stresses at the leading and trailing edge of blade root and a stress concentration at the upper mid of the blade. This indicates why a failure at the lacing rod and aerofoil occurred in this station.
Mechanical vibration is one of the most important phenomena studied by mechanical engineering, as well as other branches of engineering. Since most of the mechanical machines contain rotor shafts, then hard conditions during operation cause many faults to occur, one of which is the unbalance fault. Therefore, this research studies the diagnosis of static unbalance fault that causes the vibration of the rotor shafts, through conducting a real model for the unbalance fault of the rotor shaft in order to obtain the real vibration signal resulting from this fault. Moreover, monitoring the vibration signal in the frequency domain, and detecting the machine condition during operation at different speeds, and with position sensor device three axes for the bearing (horizontal, vertical, and axial). It has been proved that unbalance increases by increasing speed, and it becomes more obvious in the horizontal axis. Detecting faults unbalancing in the rotor shafts can also be done by taking the value of root mean square (RMS), which represents the maximum value that can be taken from the horizontal axis of the bearing. This value can be compared with the international standards (ISO 12372) to ensure being within the allowed limits.
Green energy, including wind energy, becomes a vital component of reducing air pollution and enhancing its sustainability. Wind energy production increases rapidly due to its significant turbine technologies, compatible with sources of energy-environment friendly in reducing Carbon emissions. This paper presents an evaluation of wind power potential of Nineveh governorate in the northern part of Iraq based on the GIS technique using 20 years daily wind speed and direction at elevation 10m, 50m on earth surface covering the period of 2000 to 2019 obtained from NASA agency. It is observed that Nineveh Governorate and its surrounding have a wind speed between 2.8 and 3.7m/s at 10m, and wind speed between 3.9 and 5.3m/s at 50m. The annual mean power density ranges from 54 to 124 W/m 2 at 50m.These results indicate that the monthly variation recorded for the speed is maximum 3.7m/s at 10m and a value of 5.3 m/s at 50m in the northwest direction in Hadhar site which matched with the results obtained by GIS/ IDW interpolation map of the power density.
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