(8) An SI, six-liter, V8 race car engine operates at WOT (wide open throttle) on a four-stroke cycle at 6000 r.p.m. using stoichiometric nitromethane. fuel enters the engine at arate of 0.198 kgand combustion efficiency is 99%. calculate: (a) Volumetricefficiency of engine. (%)sec(b) flow rate of air into engine. (kesec(c) Heat added per cycle per cylinder. (kj)ANS: (a) 95, (b) 0.337, (c)5.35

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Answered: (8) An SI, six-liter, V8 race car…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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A spark ignition engine based on Otto cycle has a working temperature range of 25.0 °C and 700.0 °C and its output power is 200 kW. The efficiency of this engine is found to be 56.5%. a. Calculate the compression ratio (r). b. Calculate the input power. c. Calculate the mass flow rate (kg/sec) of air. d. Consider reducing the air emission by 10% while keeping the same materials for key components of the engine, maximum engine temperature of 700.0 °C and input power obtained from part (b). Propose modification and analysis the possible impact on other physical properties. [for air cp = 1.003; c, = 0.717 J/kg-K]
The following data is given for a four-stroke diesel engine: Cylinder bore = 250 mm, Length of stroke = 300 mm, Speed = 600 rpm, Indicated mean effective pressure = 0.6 Mpa, Mechanical efficiency 80% Maximum gas pressure = 4 Mpa, Fuel consumption = 0.25 kg per BP per h Higher calorific value of fuel = 44 000 kJ/kg, Assume that 5% of the total heat developed in the cylinder is transmitted by the piston. The piston is made of grey cast iron FG 200 (Sut = 200 N/mm² and k = 46.6 W/m/°C) and the factor of safety is 5. The temperature difference between the centre and the edge of the piston head is 220°C. () Calculate the thickness of piston head by strength consideration. (i) Calculate the thickness of piston head by thermal consideration. (ii) Which criterion decides the thickness of piston head? (iv) State whether the ribs are required. (v) If so, calculate the number and thickness of piston ribs. (vi) State whether a cup is required in the top of the piston head. (vii) If so, calculate…
Identify the correct order of the cycles in the four-stroke engines analyzed in lab, with the first cycle beginning when the piston is at Top Dead Center and no air-fuel mixture is present in the combustion chamber. Combustion, Intake, Compression, Exhaust Intake, Compression, Combustion, Exhaust Intake, Combustion, Compression, Exhaust Intake, Combustion, Exhaust, Compression
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