7.A single cylinder, single acting, four stroke cycle gas engine develops 20 kW at 250 r.p.m. The workdone by the gases during the expansion stroke is 3 times the work done on the gases during thecompression stroke. The work done on the suction and exhaust strokes may be neglected. If theflywheel has a mass of 1.5 tonnes and has a radius of gyration of 0.6m, find the cyclic fluctuation ofenergy and the coefficient of fluctuation of speed.[Ans. 12.1 kN-m; 3.26%]

Answered: 7. A single cylinder, single acting,…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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7. A single cylinder, single acting, four stroke cycle gas engine develops 20 kW at 250 r.p.m. The work done by the gases during the expansion stroke is 3 times the work done on the gases during the compression stroke. The work done on the suction and exhaust strokes may be neglected. If the flywheel has a mass of 1.5 tonnes and has a radius of gyration of 0.6m, find the cyclic fluctuation of energy and the coefficient of fluctuation of speed.
An engine having five cylinders in line, as shown in Figure Q5, has successive cranks 1440 apart, the distance between cylinder centre lines being 450 mm. The reciprocating mass for each cylinder is 12 kg, the crank radius is 120 mm and the connecting rod length is 450 mm. The engine runs at 650 rev/min.
In a reciprocating engine which has four cylinders in line, the reciprocating masses are each 0.5 kg per cylinder. The stroke is 120 mm, and the connecting rods are 450 mm long. The firing order of the engine is 1-4-2-3 and the cranks are set at 90° to each other. The cylinders are spaced 140 mm apart and the engine speed is 2000 rev/min. Find: 1.The maximum out-of-balance primary and secondary forces. 2. The maximum out-of-balance primary couples.
Seatwork No. 1 An SI I-2 square engine operates on a 2-stroke cycle at 2400 rpm. The average piston speed is 15 m/se and the no. of piston action is 2. When the piston is at its maximum position the remainder volume is 0.005 Liters. Determine: a. Volumetric displacement per unit time for all cylinders (m³/sec) b. Compression ratio c. Volume at Bottom Dead Center (m³)
A horizontal cross compound steam engine develops 500 kW at 100 rpm. The coefficient of fluctuation of energy as found from the turning moment diagram is to be 0.1 and the fluctuation of speed is to be kept within ± 0.5% of the mean speed. Find the mass of the flywheel required, if the radius of gyration is 3 meters.
A three-cylinder single acting engine has its cranks set equally at 120° and it runs at 1200 1.p.m. The torque-crank angle diagram for each cycle is a triangle for the power stroke with a maximum torque of 90 N-m at 60° from dead center of corresponding crank. The torque on the return stroke is sensibly zero. Determine: • Power developed. • Coefficient of fluctuation of speed, if the mass of the flywheel is 6 kg and has a radius of gyration of 80 mm. • Coefficient of fluctuation of energy. • Maximum angular acceleration of the flywheel.
A gas engine (four stroke) working on the Otto cycle has cylinder bore of 210 mm and stroke length of 240 mm. The clearance volume is 1550 cm3. The pressure and temperature at the beginning of I bar and 23°C respectively. The maximum temperature of the cycle is 1450°C. The developed by the engine if the rotational speed is 3500 rpm is (the specific heat ratio is, y heat at constant volume Cy = 0.717 kJ/kg.K and the gas constant is 287 J/kg.K for air):" A. 140 kW B. 105 kW New Ror C. 225 kW D. 95 kW
i need the answer quickly
A single cylinder, four stroke cycle, reciprocating engine develops 160 brake horsepower with a brake mean effective pressure of 120 lb/ sq.in and an engine speed of 2000 revolutions per minute. The length of the stroke and the diameter of the bore in the cylinder are equal. Find the piston diameter.
i need the answer quickly
The length of stroke of a four cylinder four stroke cycle SI engine is1.6 times the diameter of the cylinder. The engine develops 25 kWbrake power at 2450 rpm. Each piston observes a mean effectivepressure of 8.5 bar and the mechanical efficiency is 86%. Find thediameter and stroke length of each cylinder.
The firing order in a 6-cylinder vertical 4-stroke inline the engine is 1-2-4-6-5-3. The piston stroke is 100 mm and length of connecting red is 200 mm. The pitch-distance between cylinder center lines are 100 mm, 100 mm, 150 mm, 100 mm and 100 mm respectively. The reciprocating mass perlylinder is 1.0 kg and the engine runs at 3000 rpm. Determine the unbalance primary, and secondary forces and couples on engine. Is it the best firing order? If yes, why? What will be consequence of other firing order.

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