| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 97 === Range hood is utilized extensively in the kitchen ventilation to maintain the air quality and prevent the soot pollution, which are essential for cook’s health. Thus an increasing demand for the high performance and low noise range hood is generated and motivated this integrated CFD, mockup fabrication, and experimental work. At first, the detailed flow visualization on Lee’s optimum design is executed and examined carefully for serving as the modification reference with the aids of numerical calculations. Later, the systematic and thorough geometry variations on inlet cone, hub, airfoil blade, impeller, spiral housing, and outlet conical cone are implemented for improving its aerodynamic outputs. It is demonstrated numerically that inlet cone, rotor blade, and outlet cone have the strongest impact on this performance enhancement research. Also, 29.8% flow rate increase and 28.2% maximum static pressure gain are achieved by setting parameters appropriately. Thereafter, the range hood mockup is fabricated via a CNC machine and executing the performance measurements in AMCA chamber for experimentally validating the numerical outcome. A comparison between numerical and experimental results indicates an acceptable deviation percentage within 10% for the entire performance curve. In conclusions, this rigorous and integrated study successfully establishes a systematic and reliable design scheme for range hood manufacturer and enlarges the aerodynamic characteristics of Lee’s range hood by almost 30%.
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