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Showing 1 to 9 of 9 for “"Axial-flow fan"”.
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Predicting Axial Flow Fan Sound Pressure Spectrums
Made available in DSpace on 2014-12-11T17:36:09Z (GMT). No. of bitstreams: 1 7524255.pdf: 8339950 bytes, checksum: 096e097bd75d545071c0dfb33a1853d9 (MD5) Previous issue date: 1975
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Simulating the performance of the 24 ft. installed MinWaterCSP axial flow fan
… condenser systems use arrays of large diameter axial flow fans to discharge heat to the ambient air. However, assessing the installed performance of these large axial flow fans remains a challenge, especially when correlating full-scale installed performance with small-scale standardized tests, …
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The correlation of randomness with high tip losses in an axial flow fan stage
… survey the by-pass duct downstream of an axial flow fan stage are presented. The probe measures time resolved total temperature and total pressure from which isentropic efficiency is calculated. The objective was to provide time resolved data to further the understanding of the flow and …
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Computer-aided design of axial-flow fans
… the process of designing low- to medium-speed, axial-flow fans and blowers is discussed, and a Fortran program called FANJD is introduced. The first purpose of F AN3D is to perform the aerodynamic and mechanical calculations needed to establish the basic geometry of an axial-flow fan blade. …
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Computational study of the effects of protruding studs casing treatment on the performance of an axial transonic turbofan
… based on casing treatments, often involving flow paths into the rotor casing, to affect the behavior of the flow in favorable ways. In either case, it is desirable that the stability enhancing method be as simple as possible and that it keep performance and/or efficiency degradation to a …
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A Method for Evaluating the Application of Variable Frequency Drives with Coal Mine Ventilation Fans
The adjustable-pitch setting on an axial-flow fan is the most common method of controlling airflow for primary coal mine ventilation. With this method, the fan operates at a constant speed dictated by its motor design. The angles of the blades are adjusted to change the amount of airflow and …
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Development of a rotor model for the numerical simulation of helicopter exterior flow-fields
… model the effect of a rotor on the surrounding flow-field. The model calculates the time-averaged aerodynamic forces exerted on the air by the fan blades within the blade-swept region, and permits the user to specify blade properties such as cross-sectional profile and orientation at a …
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Application of Background Oriented Schlieren (BOS) in Underground Mine Ventilation
… by air movement. The ability to visualize gas flows has significant implications for analyzing underground mine ventilation systems. Currently, the widely utilized traditional schlieren methods are impractical underground due to complex equipment and design requirements. Background oriented …
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Bio-Inspired Axial Fan Design, 3D Printing Fabrication and Characterization for Noise and Flow Performance Optimization
… acoustic regulations. In this context, axial-flow fans represent a key technological component, acting as major sources of both tonal and broadband aerodynamic noise, with direct implications for public health, building energy performance, and urban liveability. Mechanical fans, …