Universidade Federal De Santa Catarina Programa De Pós-graduação Em Engenharia Mecânica

Content Provider	Semantic Scholar
Author	Novak, Paulo Rogério
Copyright Year	2011
Abstract	Fans are machines used to move gas with high airflow rate and low pressure making the mechanical energy generated from the fans rotor into kinetics energy and the fluids pressure. These fan’s can be used in many forms from industrial to commercial needs. The first way to classify them is by the type of rotor, either axial or centrifugal. Centrifugal fans may have their propellers straight, curved to front or back. Each type has its own characteristics. With many variations of these characteristics for each type of fan it is possible to achieve different performance rates. To get an accurate response curve from industrial fans it is used test bench to obtain such a curve for the fan been tested. For that these dissertation describes the development for the instrumentation of the test bench used in this studied case as well as the metrological analyses of results. The main objective of the analyses is to inform and ensure that the measurements must be with a probability certainty within a range of values. This makes the measurements trustable and traceable metrologically in a way that for any alteration in the measurement system are specific for the determination in minimizing the measurements uncertainty. To achieve these goals it is proposed and developed the instrumentation for the test bench which can perform measurements in torque, rotation, velocity and airflow rate, and the powers involved. It was developed a software to process the signals from sensors using the LabVIEW platform which performs the metrological analyses by a method different from the traditional ISO GUM, using the Monte Carlo method which is known for generating a probability density function. With the results generated it is analyzed the minimum interval which contains 95% of the obtained values.
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Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article