minute of fuel B/ A simple jet carburetor is required to supply 5 kg of air per minute and 0.45 kg per of density 740 kg/m³. The air is initially at 1.013 bar and 25°C, take y=1.4, cp=1.005 kJ/kg.K and R=0.287 kJ/kg.K (i) Calculate the throat diameter of the choke for a flow velocity of 95 m/s. Velocity coefficient is 0.85. (ii) If the pressure drop across the fuel metering orifice is 0.75 of that at the choke, calculate the orifice diameter ssuming Cd = 0.60. Male)

minute of fuel B/ A simple jet carburetor is required to supply 5 kg of air per minute and 0.45 kg per of density 740 kg/m³. The air is initially at 1.013 bar and 25°C, take y=1.4, cp=1.005 kJ/kg.K and R=0.287 kJ/kg.K (i) Calculate the throat diameter of the choke for a flow velocity of 95 m/s. Velocity coefficient is 0.85. (ii) If the pressure drop across the fuel metering orifice is 0.75 of that at the choke, calculate the orifice diameter ssuming Cd = 0.60. Male)

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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A single-stage, single-acting air compressor with runs at speed 600 rpm. It has a polytropic index of 1.26. The induced volume flow rate is 0.72 cubic meters per min and the air must be delivered at a pressure of 660 kPa. The free air conditions are 101.3 kPa and 15 0C. The clearance volume is 6.8% of the stroke volume and the stroke/bore ratio is 1.6/1. Calculate the volumetric efficiency in 3 decimal places.
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Divided chamber diesel engines use lower injection pressures compared to open chamber enginesbecause (a) Pintle nozzles cannot withstand high injection pressures (b) High air swirl does not require high injection pressures for atomization (c) High injection pressures may cause over-penetration (d) High injection pressure causes leakage of the fuel at the pintle
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A simple jet carburetor is required to supply 5 kg of air and 0.5 kg of fuel per minute. The fuel specific gravity if 0.75. The air is initially at 1 bar and 300 K. Calculate the throat diameter of the choke for a flow velocity of 100 m/s. Velocity coefficient is 0.8. If the pressure drop across the fuel metering orifice is 0.80 of that of the choke. Calculate orifice diameter assuming Cdf=0.60 and γ = 1.4
TThe venturi of a simple carburetor has a throat diar the coefficient of flow is 0.8. The fuel orifice has a and the coefflicient of fuel flow is 0.65. The gasolin surface is 5 mm below the throat, calculate * of 20 mm and er of 1.14 mm when the nozzle (i) the air-fuel ratio for a pressure drop of 0.0. tip is ne arted (ii) the aiaeDW atio when the nozzle tip is taken into account (iii) the minimum velocity of air or critical air velocity requi red to start the fuel flow when the nozzle tip is provided. Assume the density of air and fuel as 1.20 and 750 kg/m respectively.
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The Venturi of a simple carburetor has a throat diameter of 25 mm and the coefficient of air flow is 0.87. The fuel orifice has a diameter of 1.35 mm and the coefficient of the fuel flow is 0.66. The petrol surface is 6 mm below the throat. Find (a) The air-fue ratio for a pressure drops of 0.07 N/m² when the nozzle tip is neglected. (b) The air-fuel ratio when the nozzle tip is taken into account (c) the minimum velocity of air or critical air velocity required to start the fuel flow when nozzle tip is provided. Take the density of air and fuel as 1.2 and 750 kg/m³ respectively.
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Single stage, single-acting air compressor. Air delivery for this device is 30 bar at a speed of 1500 rev/min. The atmospheric condition of his location is 87 kPa and 20 ˚C, with a FAD of 0.22 m2/min. The clearance volume is 4% of the swept volume and the stoke/bore ratio is 1.3/1. Take “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg KW 1.What is the isothermal power of the compressor in kW to 2 decimal places in kW? 2. which formula will be used to evaluate the isothermal efficiency? 3. which formula will be used to evaluate the delivery volume? 4. What is the induced volume in terms of stroke volume, provide the coefficient values of the swept volume to 4 decimal places?