Propeller Generating User-defined Primitive (UDP) in Engineering Sketch Pad
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Oluwalana, Daniel
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Abstract
Engineering Sketch Pad (ESP) is a web-based system used to create and manipulate geometry for the aim of designing and analyzing aerospace vehicles. There are User-defined Primitives that are pre-packaged with ESP; however, the system also allows users to create their own single body primitives written in C, C++ or FORTRAN and have them coupled with ESP and compiled in real time. The purpose of this paper is to detail the process used in creating a User Defined Primitive (UDP) within Engineering Sketch Pad that generates a propeller using a well-established design process. Prior to this propeller scheme implementation in the software, a user would generate a propeller by manually arranging a series of airfoils at certain angles and applying a covering or skin over them, an inefficient method as users would have to permute the airfoil arrangements to achieve the design shape and power. UDP Propeller is the first power/thrust auto-derived propeller primitive to be implemented in any CAD software as it creates optimum propeller blades for an aircraft’s engine based on specifications from a user such as power coefficient and advance ratio.
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2021-04
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