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a) Determine the work done by the steam on the piston if steam is admitted to the cylinder at 20 bar throughout the 25 m stroke. The piston diameter is 500 mm. It assumed that the process is reversible. (Ans: W = 9.817 MNm or MJ) may be b) In some instances steam is admitted for part of the stroke only and thereafter the fixed mass of steam in the cylinder expands to a reduced pressure. If steam is admitted at 20 bar for 60% of the stroke, the pressure falling linearly to 4 bar over the remainder of the stroke, sketch a diagram of steam pressure against volume and determine the new work done. (Ans: W = 8.24 MJ)

a) Determine the work done by the steam on the piston if steam is admitted to the cylinder at 20 bar throughout the 25 m stroke. The piston diameter is 500 mm. It assumed that the process is reversible. (Ans: W = 9.817 MNm or MJ) may be b) In some instances steam is admitted for part of the stroke only and thereafter the fixed mass of steam in the cylinder expands to a reduced pressure. If steam is admitted at 20 bar for 60% of the stroke, the pressure falling linearly to 4 bar over the remainder of the stroke, sketch a diagram of steam pressure against volume and determine the new work done. (Ans: W = 8.24 MJ)

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A steam catapult is used to assist the acceleration of aircraft from standstill to flight speed in a very short distance. Steam is admitted to the cylinder and steam pressure acts on a piston sliding in a cylinder. The force produced is transmitted to the aircraft by means of a suitable linkage. a) Determine the work done by the steam on the piston if steam is admitted to the cylinder at 20 bar throughout the 25 m stroke. The piston diameter is 500 mm. It may be assumed that the process is reversible. (Ans: W = 9.817 MNm or MJ) m %3D b) In some instances steam is admitted for part of the stroke only and thereafter the fixed mass of steam in the cylinder expands to a reduced pressure. If steam is admitted at 20 bar for 60% of the stroke, the pressure falling linearly to 4 bar over the remainder of the stroke, sketch a diagram of steam pressure against volume and determine the new work done. (Ans: W = 8.24 MJ)
Transcribed Image Text:A steam catapult is used to assist the acceleration of aircraft from standstill to flight speed in a very short distance. Steam is admitted to the cylinder and steam pressure acts on a piston sliding in a cylinder. The force produced is transmitted to the aircraft by means of a suitable linkage. a) Determine the work done by the steam on the piston if steam is admitted to the cylinder at 20 bar throughout the 25 m stroke. The piston diameter is 500 mm. It may be assumed that the process is reversible. (Ans: W = 9.817 MNm or MJ) m %3D b) In some instances steam is admitted for part of the stroke only and thereafter the fixed mass of steam in the cylinder expands to a reduced pressure. If steam is admitted at 20 bar for 60% of the stroke, the pressure falling linearly to 4 bar over the remainder of the stroke, sketch a diagram of steam pressure against volume and determine the new work done. (Ans: W = 8.24 MJ)
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