Pm 1500 with possible overspeed of 2500 compression

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: size of studs when the permissible stresses for the cylinder head and stud materials are 45 MPa and 65 MPa respectively. 2. Design a cast iron trunk type piston for a single acting four stroke engine developing 75 kW per cylinder when running at 600 r.p.m. The other avialable data is as follows: Maximum gas pressure = 4.8 N/mm2; Indicated mean effective pressure = 0.65 N/mm2; Mechanical efficiency = 95%; Radius of crank = 110 mm; Fuel consumption = 0.3 kg/BP/hr; Calorific value of fuel (higher) = 44 × 103kJ/kg; Difference of temperatures at the centre and edges of the piston head = 200ºC; Allowable stress for the material of the piston = 33.5 MPa; Allowable stress for the material of the piston rings and gudgeon pin = 80 MPa; Allowable bearing pressure on the piston barrel = 0.4 N/mm2 and allowable bearing pressure on the gudgeon pin = 17 N/mm2. 3. Design a piston for a four stroke diesel engine consuming 0.3 kg of fuel per kW of power per hour and produces a brake mean effective pressure of the 0.7 N/mm2. The maximum gas pressure inside the c...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online