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A naturally-aspirated, direct-injection, four-stroke diesel engine has a total displacement volume of 10L, 125 mm bore and 16.3:1 compression ratio. The engine produces a maximum of 210 kW at 2100 RPM. Assuming that the intake air is at 45°C and 22.5 g/s of air flow into each cylinder:
a) Calculate the volume in each cylinder when the piston reaches TDC.
b) Calculate the volumetric efficiency when the piston speed is 9 m/s.
c) Identify a dynamic factor that reduces volumetric efficiency at high engine speeds. FULLY explain how and why the selected parameter affects the engine volumetric efficiency.
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A 25-g bullet is traveling with a velocity of 425 m/s when it impacts and becomes embedded in 2.5 kg wooden block. The block can move vertically without friction. Determine a) the velocity of the bullet and block immediately after impact,
Describe how you would implement it using an open-loop system
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