Experimental and Computational Investigation of Triple-rotating Blades in a Mower Deck.

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  • CHON Woochong
    Department of Mechanical Engineering, University of Wisconsin-Milwaukee
  • AMANO Ryoichi S.
    Department of Mechanical Engineering, University of Wisconsin-Milwaukee

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Experimental and computational studies were performed on the 1.27m wide three-spindle lawn mower deck with side discharge arrangement. Laser Doppler Velocimetry was used to measure the air velocity at 12 different sections under the mower deck. The high-speed video camera test provided valuable visual evidence of airflow and grass discharge patterns. The strain gages were attached at several predetermined locations of the mower blades to measure the strain. In computational fluid dynamics work, computer based analytical studies were performed. During this phase of work, two different trials were attempted. First, two-dimensional blade shapes at several arbitrary radial sections were selected for flow computations around the blade model. Finally, a three-dimensional full deck model was developed and compared with the experimental results.

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