Question
The following parametric curves have been used to define the shape of a turbine blade for a new jet engine. The two curves represent the
The following parametric curves have been used to define the shape of a turbine blade for a new jet engine. The two curves represent the bottom and top edges of the blade.
P1 (u) = (3u, u2 + 1, 1-u)
P3 (u) = (4-u2, 2u, 5)
where u varies between 0 and 1.
(i) Create a linear loft in the w direction between the two curves, and show the equation describing the lofted surface.
(ii) Calculate the points on the surface corresponding to the following pairs of u and w: (1,0), 0.5,0.5)
(iii)The fluid mechanics department sends two more “edge” curves to represent the blade:
P2 (w) = (4w2, 1-w, 1+4w2) P4 (w) = (3, 2, 5w2)
Use bi-directional lofting (linear Coons Surface) to represent the new surface.
(iv) Plot using any software and calculate the points on the new surface corresponding to the following pairs of u and w: (1,0), (0.5,0.5)
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Calculus
Authors: Dale Varberg, Edwin J. Purcell, Steven E. Rigdon
9th edition
131429248, 978-0131429246
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