A steam catapult is used to assist the acceleration of aircraft from standstill to flight speed in avery short distance. Steam is admitted to the cylinder and steam pressure acts on a piston slidingin a cylinder. The force produced is transmitted to the aircraft by means of a suitable linkage.a) Determine the work done by the steam onthe piston if steam is admitted to the cylinderat 20 bar throughout the 25 m stroke. Thepiston diameter is 500 mm. It may beassumed that the process is reversible.(Ans: W = 9.817 MNm or MJ)m%3Db) In some instances steam is admitted forpart of the stroke only and thereafter thefixed mass of steam in the cylinder expandsto a reduced pressure. If steam is admitted at20 bar for 60% of the stroke, the pressure falling linearly to 4 bar over the remainder of thestroke, sketch a diagram of steam pressure against volume and determine the new work done.(Ans: W = 8.24 MJ)

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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

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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