Investigation of Flow Behavior around Corotating Blades in a Double-Spindle Lawn Mower Deck

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Chon W. ; Amano R. S. (2005)
  • Publisher: Hindawi Limited
  • Journal: International Journal of Rotating Machinery (issn: 1023-621X, eissn: 1542-3034)
  • Related identifiers: doi: 10.1155/IJRM.2005.77
  • Subject: TA1-2040 | laser Doppler velocimetry | rotating blades. | rotating blades | experimental investigation | computational fluid dynamics | Engineering (General). Civil engineering (General) | lawn mower

<p>When the airflow patterns inside a lawn mower deck are understood, the deck can be redesigned to be efficient and have an increased cutting ability. To learn more, a combination of computational and experimental studies was performed to investigate the effects of blade and housing designs on a flow pattern inside a <math alttext="1.1un{m}"> <mn>1.1</mn><mtext>m</mtext> </math> wide corotating double-spindle lawn mower deck with side discharge. For the experimental portion of the study, air velocities inside the deck were measured using a laser Doppler velocimetry (LDV) system. A high-speed video camera was used to observe the flow pattern. Furthermore, noise levels were measured using a sound level meter. For the computational fluid dynamics (CFD) work, several arbitrary radial sections of a two-dimensional blade were selected to study flow computations. A three-dimensional, full deck model was also developed for realistic flow analysis. The computational results were then compared with the experimental results.</p>
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