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This document analyzes the computational fluid dynamics (CFD) of flue gases over a valve spindle with rotor wings in 2-stroke marine diesel engines. It aims to increase the time between overhauling (TBO) of the engines by modifying the rotor wing design parameters. The study models the spindle-rotor assembly and analyzes temperature, pressure and rotational effects of exhaust gases on the spindle using ANSYS. Modifying the rotor wing inclination angle is found to give more uniform corrosion and increase spindle rotation angle, potentially extending its lifeline. Validation shows the CFD results match published engine data, demonstrating the methodology can help optimize spindle design for reduced maintenance costs.
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This document summarizes a study on construction sequence delays for road infrastructure projects. It begins with an abstract that outlines the objectives of studying delay causes and factors that contribute to construction sequence delays for road projects. It then reviews literature on previous studies related to construction delays, earned value management, and delay analysis methods. The document describes the methodology used, which was a questionnaire survey to identify and rank significant delay causes. It presents the results of the survey, identifying the top 10 delay causes. It then describes a case study analysis of a road project in India using earned value management to validate the questionnaire findings. The key delays identified for the case study project were related to land acquisition, environmental issues, and coordination challenges.
Projeto sie emef conrado doeth
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Este documento resume una lección de aritmética impartida por el profesor Sergio Ulises Fuentes López a estudiantes de primer grado. Describe las actividades del profesor durante la clase, incluyendo el uso de materiales didácticos, la resolución de problemas, y la participación de los estudiantes a través de preguntas y discusión del tema.
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