Abstract
In the present paper, we have considered about a fundamental fluid machine having a screw fin. The screw type fluid machine can transport a fluid substantially with a very simple structure. It has been, therefore, used as a water pump. On the other hand, there is not the example which was applied to a blower because of low efficiency and not to be suitable for gas transportation. However, it can forecast the degree of freedom of installation and the noise reduction. Here, we have examined the optimum fin design by dividing the spiral fin into a circular elements to obtain the design guidance of the screw wing when I used the screw wing as a blower, and considered the optimum pitch angle using CFD.
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