A circular cylinder of 1.0 m diameter and 10 m length is rotated at 420 r. p.m. about its axis when it is kept is air stream with 11.0 m/s velocity perpendicular to its axis. Determine: (i) Circulation around the cylinder, (ii) Theoretical lift and lift co-efficient, (iii) Position if stagnation points,

Elements Of Electromagnetics
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13. A circular cylinder of 1.0 m diameter and 10 m
length is rotated at 420 r. p.m. about its axis when
it is kept is air stream with 11.0 m/s velocity
perpendicular to its axis. Determine:
(i) Circulation around the cylinder,
(ii) Theoretical lift and lift co-efficient,
(iii) Position if stagnation points,
(iv) Actual drag and lift force on the cylinder, and
(v) Actual resultant force and its direction.
Take p = 1.208 kg/m’, and experimental values
of C, and C, as 1.5 and 5.1 respectively.
[Ans. (i) 69.1 m/s; (ii) 9182.67 N; 12.565 (iii)
- 90°; (iv) 1096.26 N; 3727.28 N; (v)3885.15
N; 73.61°]
Transcribed Image Text:13. A circular cylinder of 1.0 m diameter and 10 m length is rotated at 420 r. p.m. about its axis when it is kept is air stream with 11.0 m/s velocity perpendicular to its axis. Determine: (i) Circulation around the cylinder, (ii) Theoretical lift and lift co-efficient, (iii) Position if stagnation points, (iv) Actual drag and lift force on the cylinder, and (v) Actual resultant force and its direction. Take p = 1.208 kg/m’, and experimental values of C, and C, as 1.5 and 5.1 respectively. [Ans. (i) 69.1 m/s; (ii) 9182.67 N; 12.565 (iii) - 90°; (iv) 1096.26 N; 3727.28 N; (v)3885.15 N; 73.61°]
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